0075 – Processes of ditch filling

Dog skull inside ditch 3 of Perdigões.

The nature and the processes of ditch fillings are central to ditched enclosures interpretation. Several elements can be analysed to try to understand those processes. One of them is fauna.

Usually, faunal remains are approached in terms of levels of articulated bones, present and missing bones, structure of the deposition of the bones, animals represented and other associated elements.

Recently, a study of faunal remains from ditches 3 and 4 of Perdigões enclosure done by Cláudia Costa (“Problem of filling the ditches 3 and 4 (Sector I) of Perdigões (Reguengos de Monsaraz”, Estudos do Quaternário, 6, APEQ, Porto, 2099/2010) based on stratigraphic analysis of faunal remains”) showed that the taphonomical approach is also quite relevant and that, together with the analysis of other present elements, can be a precious help to interpret the formation process of the fillings.

Here is what she says in the papers abstract:

“During archaeological intervention on sector I of Perdigões ditch enclosure (Southern Portugal), dated from the IIIrd mil¬lennium B C, a section of Ditch 3 and 4 were excavated. The ditches are parallel “V” shaped structures, excavated on local bed rock, of 1,70 m (Ditch 3) to 2 m (Ditch 4) deep.

The ditches were filled with a sequence of anthropic sediments with archaeological artefacts, mostly potsherds, and vertebrate fauna. The species present in both ditches are suids, the most numerous, followed by bovids (domestic, and an element of an auroch), ovi¬caprids, red deer, horse, dog/wolf, rabbit and hare. The anatomical representation is the opposite in each ditch: in Ditch 3 the most common elements are from cranial and appendicular skeleton, whereas Ditch 4 is filled mostly with elements from axial skeleton. This aspect linked with the specific spatial association of bones and other elements, as pottery or pebbles, with an unequivocal intentional organization, doesn’t seems to fit on the pattern of secondary refuse. The faunal remains seem to integrate the “intentional depositions” at least on some points of the sequence.

On both structures, faunal assemblages are more fragmented on top of the sequence, and on the base, faunal remains tend to be more complete. The transition of more fragmented to less fragmented bones is materialized by intentional depositions layers, unit 58 on Ditch 3 and unit 34 on Ditch 4. On the other hand, in some stratigraphic units, root etching was identified on bone surfaces. Root etching is linked to vegetation that settles on soil profiles top, on the early stages of pedogenic developments. The existence of this phenomena point to a discontinuous filling process of the two ditches, where stratigraphic units remain stable and exposed long enough to pedo¬genetic process begin. On Ditch 3, the assemblage from unit 58, interpreted as “structured depositions”, is one of the most affected assemblages by root etching, which means that after sedimentary formation and installation of “depositional structures”, the unit was exposed. The same unit was affected as well by a natural water channel that mutilates the unit’s surface.
The other natural taphonomical signatures are manganese oxide, which affects continuously all remains from Ditch 3, and in a low percentage Ditch 4, and carbonate calcium that particularly affects the base assemblages in both ditches. This aspect reveals the strati¬graphic stability of the sequence.”

0074 – What’s inside?

Possible reconstitution of the wall of the inside enclosure of Castro de Santiago and of one of the inside huts.

Usually, inside ditched enclosure we only have negative structures, basically constituted by pits. Positive structures are rare or simply nonexistent.

On the contrary, pits are rare in walled enclosures (see here), but positive structures are common (whit some exceptions, such Fraga da Pena). But it is current to find walls or alignments of stones that are usually interpreted as hut infrastructures or stone pavements.

At Castro de Santiago (Beira Alta), inside the inner enclosure, two of those huts were identified where the bedrock makes a sort of basin, and they had central fireplaces built in a hemi hexagonal plan with three slabs.


Hut infrastructures at Castro de Santiago and actual parallel in Africa.



Hut infrastructures at Castro de Santiago.

Although the walled architecture and the use of rock tor formations is similar in Fraga da Pena (just 8 km north in the same valley), the excavations made there didn’t reveal any similar structures inside. Being alike, those two walled enclosures seem to have played different functional roles, although, in terms of social identity management, they might have had similar tasks (as I have argued elsewhere: Valera, 2007).

It is important to notice what’s inside an enclosure and what’s missing to start to give them names. Structures, material cultural, social practices evidences, etc. He must “built” contexts first. So, when we have a surface evidence of a stone wall or a geophysical image of ditches, we must be careful in interpretation. If the general plan of the architecture of an enclosure could give us enough information to develop some analysis and propose some interpretation and develop some ideas, the cases of Castro de Santiago and Fraga da Pena remember us that similar general architectures could enclosure quite different contexts.

0073 – Map of Portuguese Prehistoric Enclosures

This is a map in permanent updating. From now on, it will be available in a separated page, next to the bibliography ones at the top of the blog.
It is, of course, of free use. Citation of the blog is the only request.

0072 - Águas Frias ditched enclosure

Location: Alandroal municipality, Évora district, Alentejo, South Portugal)
Chronology: Late Neolithic
Bibliographic references: Calado & Rocha, 2007.


Plan of Águas Frias (after Clado & Rocha, 2007)

Águas Frias is an interesting enclosure excavated during the rescue program of Alqueva dam, but still to be fully published. Is located in the valley of the Lucefecit river, a tributary of the Guadiana.

It presents in the left bank of the river three apparently concentric ditched enclosures, designed by wavy ditches with “V” profiles, being the middle one more regular in plan than the others and presenting the outside one a complex sequence of negative elongated structures in the north part. Based on its archaeological material the site was dated from Late Neolithic (second half of the 4th millennium BC).

Because the archaeological intervention was done when the dam was already flooding, the Lucefecit was then much larger and it was impossible to know if the ditches go through the river to the other side and the enclosures would be crossed by the water stream, as it happen in other cases (Porto Torrão, in Portugal; Pijotilla in Spain).

Nevertheless, the site was interpreted as a village and the ditches as defensive structures associated to palisades which ended in the water borders, creating an image of a semi circular settlement.


Águas Frias model(after Calado, 2007, in http://megasettlements.blogspot.com/2007/01/re-creating-past_24.html).

An interesting aspect, yet to be explained, is the way in which one of the ditches ends, presenting the extremity in a ramp filled with a stone pavement.


Image of the ditch end (after Calado & Rocha, 2007)

0071 - Enclosures mental images

Some Portuguese enclosures present designs that have patterns that are visually striking from above and as a whole (from an aerial picture or geophysics image, for instance). Just like, with the natural differences, the Nasca “land drawings”. But their builders and users didn´t saw those images (well, there is the question of the possible balloons in Nasca).

But, didn´t they?

Could sites like Xancra, Santa Vitória, Outeiro Alto 2, Monte do Olival or Perdigões not have a previous and spread mental image that the architecture was reproducing? In fact, we have the metal capacity of imagining and visually conceive what we actually cannot see. We built mental maps, for instance, and we can build mental plans, even without flying or drawing.

So, how really were perceived these enclosures in terms of their plans and designs? Could this perception of Xancra ever been formed in the mind of one of its builders or visitors?

0070 - Neolithic ditches and rectangular houses

Senhora da Alegria is a surprising and important site, by the combination of its location, structures and chronologies.

It is located in central Portugal, where the littoral platform gives way to the central mountains and in one of the pathways to the hinterland of Beira Alta central Portugal, where no ditched/palisade enclosures were known until now.

A sequence of occupations dating from Early Neolithic (with “cardial” decorated pottery) to Late Neolithic is being excavated by the Omniknos company (scientific coordination of António Valera and field direction of Tiago do Pereiro and Rui Ramos) in a context of archaeological emergency intervention.

The site presents several ditches, some of them probably corresponding to palisades, that form more than one enclosure, with several moments of construction with structures cutting other structures.


One of the ditches of the eastern side of the site.

Those ditches cut previous early Neolithic layers and some of them may be also from the same period and others from a middle Neolithic phase. These ditches are then covered by layers with positive stone structures, dating from middle/late Neolithic.




One of the ditches of the western side of the site, going under Late Neolithic layers.

It is, therefore, the earliest site with this kind of structures known in Portugal (and in this area of Portugal), revealing that also in western Iberia this architectures are present at the early stages of the Neolithic (as was already documented in eastern Iberia).

But it also present one (at the moment) rectangular house. Rectangular Neolithic houses are quite rare in Western Europe. In Portugal, for the recently excavated and published site of Castelo Belinho in Algarve (by Mário Varela Gomes), post holes were argued to be evidences of the presence of rectangular houses. Nevertheless, some scepticism has been revealed by some scholars relating those interpretations, because of the large and scattered number of post holes. But at the present site the image of the structure is striking and leaves no doubts: a sub-rectangular house (with slightly rounded corners), with central posts aligned with the entrance (facing east), with 10,5 x 5,5 meters.


Image of the house post holes.


One of the post holes of the entrance (left) and one of the central ones, reaveling two construction moments (right) .

So, this archaeological context also presents for the first time in Iberia the “association” of rectangular houses with ditches at a same site and gives strength to the interpretations developed for the Algarve’s site.



Located at in a hinterland transitional point, this site is already fundamental to the research of Neolithic process of West Iberia, to the emerging of the surrounding megalithism (and the Beira Alta one) and to the problems concerning the appearance of ditches/palisades enclosure architectures in the peninsula.

Not everything is bad news in this new year of 2012.

0069 - Topographical differences

I’m now writing the paper presented at the Rome conference, where the main issue was to compare ditched and walled enclosures in South Portugal, since they share the same general space and time.

I centred my analyses in eight aspects: tendency for architectonic separation; topographical location; dimensions; design ; architectonic dynamics and associated practices, cosmological foundation of architecture; relation to funerary practices; practice of metallurgy. Some of these items were already discussed here (dimension, presence of pits).

Today I would like to draw the attention to the topographical differences between the locations of this to kind of architectures. Those differences can be expressed as a more homogeneous location strategy for walled enclosures that prefers exclusively hill tops (or cliff edges or high rocky tors in central and north Portugal), and a more diversified location for ditched enclosures. We can find them also on hill tops (Santa Vitória, Outeiro Alto 2), but they can be in the middle of smooth slops (Xancra, Monte do Olival), in natural amphitheatres (Perdigões, Paraiso), in large valleys (Porto Torrão) or spread from small and flat hill tops, through the slops and to the lower ground (Moreiros 2).

In fact, ditched enclosures do not reveal a particular standard pattern of location. By the contrary, they relate themselves with the landscape in diverse ways, although we can observe some tendencies, like the interest of building facing east (frequently with gates astronomically orientated).

This difference between ditched and walled enclosures is just one amongst others, suggesting that, in general, they didn’t serve exactly the same purposes or, at least, that those architectures were responding and were related to specific practices that were not shared by both.

0068 - Plurality of funerary practices in ditched enclosures

Cremation experiment in progress (Tõnno Jonuks & Marge Konsa, “The revival of Prehistoric burial practices: three archaeological experiments”, 2007)

This is an issue that will be discussed in the becoming meeting on Perdigões research project, next February. There, new radiocarbon dates demonstrate that several different practices regarding bodies manipulations were occurring at the same time (according the method resolution capability) in several areas of the enclosure and in different structures.

The data that is being obtained at Perdigões, as I have said already elsewhere, demands new theoretical approaches to funerary practices in Late Neolithic / Chalcolithic, namely the ones that deal with the problems of the unity and ontology of the body and that develop relational conceptions of burial places and structures. The notion of necropolis, as a clear individualized space for the dead, is clearly at risk in Perdigões, as in other large ditched enclosures.

0067 - Ditches are spreading to Central/North Portugal

Plan of Gonçalvinhos (Mafra, Lisbon) small ditch segment (after Sousa, A.C., 2010, O PENEDO DO LEXIM E A SEQUÊNCIA DO NEOLÍTICO FINAL E CALCOLÍTICO DA PENINSULA DE LISBOA, PhD thesis presented to FLUL.)

If the last decade and a half revealed a concentration of ditched enclosures and ditched structures in South Portugal hinterland (and I believe that some negative structures sectioned by Edia tube lines are yet to be correctly evaluated, probably enlarging the numbers and the “troubles”), the recent years are indicating that those archaeological realities are also present in central and north Portugal, in different topographical contexts. Some of those sites, in present process of excavation, may even be the earliest known in west Iberia with ditches.

Ditches are now emerging in Lisbon peninsula (as the one in the image), in the Mondego basin (just at the “gate” of the Beira Alta hinterland), in the deep hinterland of Beira Interior (East of the central mountains system) or near the coast, in Aveiro or Maia (north of Oporto). The north half of Portugal is revealing what should be expected, if we attend to the general picture (European and Iberian): that, like megalithism (to which they seem to be well connected), ditches structures and ditched enclosures are present and that specific research programmes should be design to detect them (since local topography and land use makes them more difficult to detect than in the southern plains).

I suspect that the near future will bring some surprises about the building of enclosures in the central coast of Portugal and their importance to the so called process of “becoming Neolithic”.

0066 - Funerary practices in Perdigões

(Click the image)

A meeting for presenting results and debate perspectives of a ongoing project of research on funerary practices at Perdigões ditched enclosure will take place in February 2012.

0065 - Human remains at Zambujal enclosure

Recently, at the Rome conference, Michael Kunst provided an interesting information about the research conducted by DAI at Castro de Zambujal walled enclosure. During the study of faunal remains, about 300 human bone remains were detected.

Until now, only one structure at Leceia and another in Castelo Velho presented human remains in walled enclosures and were interpreted in quite different terms.

This new revelation at Zambujal, still to be contextualized, reinforce the idea that some ditched enclosures have already stressed: human depositions in Western Iberia Chalcolithc are a complex and diversified practice that cannot be restricted to the traditional notion of necropolis.

0064 – A (fragmented) sequence of ditch 4 of Perdigões

Horizontal and localized depositions of stones, pottery shards and faunal remains, separated by clay deposits. At the bottom, some stone agglomeration, before a layer with calcite precipitation.

0063 - What's the meaning?

It's not from Portugal and it is not about ditched or walled enclosures, but about a famous henge. It is absolutely hilarious, but... we could do similar stuff about some of our own enclosures.
See here

0062 - Talks about Perdigões (I)

PROGRAMA GLOBAL DE INVESTIGAÇÃO ARQUEOLÓGICA DOS PERDIGÕES - INARP

Perdigões enclosure (Reguengos de Monsaraz) is one of the important archaeological contexts of the Iberian Peninsula Recent Prehistory and on that has been researched for more than a decade.

The questions that it rises and allows to developed are of significant relevance for the knowledge of Neolithic and Chalcolithic communities as well to the development of disciplinary theoretical thinking and the social models built to deal with those societies and their historical dynamics.

Several institutions and individual researchers, national and international, participate in this open and enclosing project, known at international level. Now, ERA Arqueologia, through its research unit (NIA), decided to promote the project within the academic student community.

So, a series of talks will be promoted at ERA, regarding the research, results and problems at Perdigões. In summary, trying to present what’s is going on at this magnificent site.

Academic students are the target public, but other interest people can assist if there are available places. Attending is free, submitted to inscriptions send to the email: antoniovalera@era-arqueologia.pt.

The talks can be repeated at other institutions solicitation.

Talks about Perdigões (I)

Program:

18th November 2011, from 17 to 19

- Building the Research Global Program of Perdigões
- Geophysics, spatial organization and temporalities at Perdigões
- Digging ditches 1, 3, 4 and 6: problems and interpretations.

25th November 2011, from 17 to 19

- Contexts of Funerary practices at Perdigões: a Eastern Necropolis, pits, ditches and cremation deposits.
- Material culture and interregional interaction
- Perdigões in the context of south Portugal enclosures.

Local: ERA Arqueologia (Cç, Santa Catarina, 9c Cruz Quebrada-Dafundo).
Speaker: António Carlos Valera

Inscriptions (till a maximum of ten) addressed to: antoniovalera@era-arquelogia.pt

0061 – Ditched enclosures at Alcalar

Alcalar partially geophysical image of a complex of gates and ditches (after Morán, 2010)

Location: Portimão municipality, Faro district, Algarve, South Portugal)
Chronology: Chalcolithic
Bibliographic references: Móran, 2008; 2010.

Alcalar is a large enclosure surrounded by several necropolis, with megalithic tombs, hypogea and huge tholoi.

The general plan of the enclosures is not yet kwon. Difficult to survey, due to ownership section of the local land, some areas have been submitted to geophysical prospection, but only a few parts of the results are published and available.

One of those parts corresponds to a complex system of gates through several ditches, some of them presenting configurations (in form of “hook”) similar to the ones observed in other enclosures.

At the inside there is a concentration of pits. As usually, they were interpreted as “silos and considered to belong to a storage area. Once again, I advert to the need of not assuming pits as silos without evidence. And suggesting a storage area with just a fragment image of a large site is also a risk. If we look to Perdigões global image, and assume that the thousands of pits were silos, then Perdigões we be just a huge warehouse (and excavations are, naturally, showing a quite different situation).


Concentration of stones inside ditched (after Morán, 2008)

As to the ditches, only two segments of a wavy ditch were excavated, that had 2,5m wide at the top. Inside, concentrations of stones and some parts of animals in anatomical connection, including a complete lamb, other disperse and abundant faunal remains of vertebrates and of shells. These deposits, that in different approaches could be seen as structured depositions, were interpreted as garbage dumping from domestic units.

Supported in a materialistic approach, the site is seen by its researchers as a settlement and a political centre of a pristine form of state, from where an elite rule through coercion a vast hierarchical territory.

0060 – Portuguese ditched enclosures at the IX CIA

A paper and two posters are being presented at the IX Congress of Iberian Archaeometry, held in Lisbon. The paper focus on the results of the project on Cosmological Foundation of Enclosures Architectures analysed through geophysical survey. The posters present the geophysical results at Xancra and Moreiros 2.
A Project of NIA-ERA, financed by Gulbenkian Foundation (that is hosting the conference).

0059 – Isn’t quantity a quality?

Hundreds of pits in partial images of Xancra and Perdigões enclosures

Another astonishing difference between ditched and walled enclosures is the association to pits.

Traditionally, even when not excavated, what looks like a pit is designated by “silo”. When they are numerous they became a storage area controlled by an elite. But when excavated, usually became “silos” reused as garbage dumps or graves or something else. But the evidence that they ever stored cereal or any kind of food is rare, when we think about the number of these structures known: thousands of thousands. Maybe we should call them just pits. There is no functional interpretation involved, and then, after research and evidence, decide what else to call them.

But what is interesting, when we compared walled and ditched enclosure (the issue of my conference in Rome), is the fact that at ditched enclosures we usually found tens, hundreds, thousands of pits, and in walled enclosures we found one or two. Well, maybe three.

De difference is striking, once again, and the traditional explanation doesn’t explain. If the ditched enclosures performed the same general function of the walled enclosures, then, why the striking difference? Don´t people in walled enclosures need storing? Aren´t they exploiting the common folks and appropriate the surplus of their work? Are they not producing garbage that needs dumping?

Well, apart from the irony, the remaining fact is that the issue has not been addressed until now. And it must. Because this is a significant difference (amongst others) that suggests that walled and ditched enclosures shouldn’t be treated as simple homologies.

0058 – Ditch 2 of Porto Torrão and beaker pottery

Beaker pottery in ditch 2 of Porto Torrão after Valera & Filipe, 2004.

As commented in the previous post, beaker pottery is recorded only in the large complexes of ditched enclosures in South Portugal (Perdigões, Porto Torrão and Alcalar)

At Porto Torrão the presence of this pottery is, inside ditch 2, almost from the beginning of sedimentation, but only with International style. The geometric and incise styles only appear in the upper levels of the sedimentation, where both progressively became more representative than the International style, specially the geometric one.

A confirmation of the chronological “décalage” of the different styles. But also a confirmation that, in these large enclosures, some ditches are still functional in the beaker times.

At Perdigões, also in the outside ditch (ditch 1) incised beaker pottery was recorded in the upper half layers of the sedimentation (Lago et al. 1998).

0057 - Beaker and ditched enclosures

Beaker pottery from Porto Torrão (after Valera & Filipe, 2004)

One interesting issue about the Portuguese ditched enclosures is the distribution of Bell Beaker pottery. We have now an inventory of almost thirty ditched enclosures, the great majority located in the Alentejo’s hierterland.

But when we look to the actual distribution of Bell Beaker pottery in ditched enclosures we are striking by one evidence: beaker pottery, characteristic of late Chalcolithic (mainly 2nd half of the 3rd millennium BC), only appears in the ditched enclosures that grow to achieve large areas and extreme structural complexity: Perdigões, Porto Torrão and Alcalar.

That suggests that the smaller enclosures didn´t reach the 2nd half of the millennium or were not permeable to beaker influences. Only the ones that became large complexes did incorporate beaker phenomena. On the other hand, several walled enclosures present beaker pottery (Monte da Tumba; São Brás) or were reoccupied in beaker times (such as Porto das Carretas or Monte do Tosco) reinforcing the differences between these categories of sites.

This is another particularity that needs careful reflexion. Even more if we add the fact (stressed in Valera, 2007 and in the recent publication of the Fronteira meeting proceedings) that there is a tendency for the small sites to present just one specific beaker style (Porto das Carretas, Miguens 3, Monte do Tosco, Barrada do Grilo, etc.) while Porto Torrão or Perdigões (the large enclosures) present influences of the several beaker styles and a significant amount of this kind of materials (especially Porto Torrão).

A circumstance that reinforces the idea that the latter development of larger ditched enclosures represents a transition to a new social dynamic that is progressively alien to the cosmological/ideological frames that generated in the first place the ditched enclosure phenomena in the Neolithic.

The Cathedral’s Era, in fact.

0056 – Dimension matters

The slide presents Portuguese walled and ditched enclosures at the same scale (the bigger walled enclosure is not Portuguese, but Spanish and near the border – Pijotilla -, used to substitute a similar Portuguese site – Porto Torrão – that doesn´t have yet its integral plan defined). The differences of sizes reached by some ditched enclosures are striking.

At Rome, my presentation was about the connections between walled and ditched enclosures in South Portugal. After established a general spatial and chronological simultaneity, several disparities were stressed. One of them was dimension.

Walled enclosures present small and, let us say, medium sizes (from less than a ha to 2 or 3 ha). Ditched enclosures present equal sizes, but some of them grew bigger, and reached areas from 20 to more than 100 ha (excluding the surrounding necropolis).

This is a striking fact that needs explanation. Why some ditched enclosures did grew so much during the Chalcolithic? Why, in the same region and time, walled enclosures kept small dimensions?

The answer, taking into account other several differences not referred in the present post but stressed at the conference, has to do with different social roles. My suggestion (to be developed in the paper) is that specific social roles of ditched enclosures, such as identity management, control and reproduction of cosmological order through architecture and social activities and funerary and ritualized practices, allowed some of them to grow and became regional centres of social aggregation and living metaphors of the cosmos.

Nevertheless, their size and meanings can somehow be seen as the “singing of the swan” of Neolithic world views. By the end of the 3rd millennium or beginning of the 2nd cal BC they are “dead” and a new social dynamics is already in course.

In a way, they remind us of the Cathedral’s Era.

0055 – Rome reunion on Chalcolithic (October, 2011)

The research of Portuguese enclosures was represented at the conference STRATEGIE INSEDIATIVE E METALLURGIA. I RAPPORTI TRA ITALIA E LA PENISOLA IBERICA NEL PRIMO CALCOLITICO ,promoted by the German Archaeological Institute, through a presentation made by me (representing NIA-ERA), comparing walled and ditched enclosures and proposing a general different social role for those architectures in the South of Portugal, by a presentation of Rui Parreira and Elena Morán of the ditched enclosure of Alcalar and its regional context from a materialistic point of view, and by a presentation of Michael Kunst about the research on Zambujal.

If the apparent antiquity of the emergency of metallurgy in North Italy was one of the main debated issues, the absent or reduced number of enclosures (walled or ditched) in that region was also a striking surprise when comparing to Iberian dynamics, where metallurgy occurred at least a millennium later.

One thing, though, seems to be shared by both regions: the emergency of metallurgy is not particularly linked to the development of enclosure architectures, for in Iberia enclosures appear before metallurgy, and in Italy metallurgy developed with no connection to enclosures.

Food for thought about the social role of both archaeological realities.

0054 – Santa Justa walled enclosure

Santa Justa(after Golçalves, 1989)

Location: Alcoutim municipality, Faro district, Algarve, South Portugal)
Chronology: Chalcolithic
Bibliographic references: Gonçalves, 1989.

Excavated during the late seventies and the eighties of the XX century, Santa Justa is a small walled enclosure located on a hilltop. Presenting a general ellipsoidal plan, it roughly measures 20m by 30 m.

Initially, it was an enclosure with to opposite gates, located in the extreme tops of the ellipse. Then, several phases of construction were detected, providing the structures of bastions, wall reinforcements and the closing of one gate and strengthening of the other.

Structures interpreted as huts were detected inside, but also outside the walls.

Metallurgic activities were detected inside and, because of the size, the site was interpreted as a “fortified farm” of farmers and metallurgists of the 3rd millennium BC.

Recently, in a materialistic approach (Morán e Parreira, 2009), the site was seen as a response to a need of protection of an elite interests and products. This elite would control through ideological coercion, and not through violence (the solution that historical materialism found to deal with symbolism), the common people of the community and would present itself as an assurance of social stability. In this context of power display, the walled enclosures such as Santa Justa would, not just reinforce, but also symbolically express that political power and prestige.

Santa Justa became one example of what historical materialistic approach calls “symbolic euphemism”: control, not through direct coercion, but through ideological persuasion and deception. Every symbolic meaning is at the service of a social strategy of power to sustain social inequality.

A theoretical elaboration that, somehow, seems to rises above the available empirical data.

Bibliographic references: Morán, H. e Parreira, R. (2009), “La exhibición del poder en el Megalistismo del Suroeste Peninsular: tres casos de studio en el extreme sur de Portugal”, Cuadernos de Prehistoria de la Universidad de Granada, 19, p.139-162.

0053 – Escoural walled enclosure and the Neolithic-Chalcolithic transition

Rock 6 and Chalcolithic tower above it (after Gomes, 1991)

Location: Montemor-o-Novo municipality, Évora district, Alentejo, South Portugal)
Chronology: Chalcolithic
Bibliographic references: Gomes, 1991.

The excavations in the walled enclosure of Escoural, located over the formation where the famous cave with Paleolithic art and Late Neolithic funerary use is, detected a wall and a tower and two phases of occupation dated from the first half of the 3rd millennium BC.

The interesting thing is that the wall and the tower were built over carved rocks with Late Neolithic “bucrânios” (representation of ox heads and horns) and a (debated) representation of a wheel car. This was considered a sanctuary and the construction of the walled enclosure was seen as a deliberated act of destruction of the previous site and of its meaning and social role. As the author puts it, the situation represents “a confrontation of two socio economic and religious conceptions”, or in another words, a confrontation between semi-nomad shepherds and sedentary farmers.

At the time, ditched enclosures were practically unknown, and for Late Neolithic no “heavy” architectures were known besides the megalithic ones. So, walled enclosures were seen as an indicator of a new social system, based on agriculture. For some, it would have its origins in internal social dynamics, for others it would have been a result of diffusion. In both conceptions, the transition from Late Neolithic to Chalcolithic was seen as an important historical milestone of periodization, a frontier between two different social systems and historical periods.

Escoural walled enclosure was used as an evidence for this perspective.

Today, we know of large architectonic investments in building ditched enclosures in the Late Neolithic (Porto Torrão, Perdigões, Juromenha 1, Ficalho, Torrão, Águas Frias, Malhada das Mimosas, Ponte da Azambuja). More than that, some of those enclosures grow bigger and continued throughout the chalcolithic, during the 3rd millennium, and became large ditched enclosures (Perdigões or Porto Torrão). Some are related to megalithic cromlechs and to funerary practices and present symbolic items that, in the overall picture, clearly reveal continuity and not rupture.

On the contrary, this can be seen in all subsystems. And as to the world views, the recent research of the symbolic foundations of some ditched enclosures suggests that the same general Neolithic cosmological system is framing chaolcolithic communities. In other words, Chalcolithic (at least untill the middle of the 3rd millennium) is the real Late Neolithic.

0052 - Torrão ditched enclosure

Location: Elvas municipality, Portalegre district, Alentejo, South Portugal)
Chronology: Late Neolithic
Bibliographic references: Lago & Albergaria, 2001.


Plan of Torrão and view of the ditch, after Lago & Albergaria, 2001)

Located in a small hill, Torrão revealed a little ditched enclosure. Excavated in a part of the ditch's route, it has apparently an ellipsoidal or oval shape, with a maximum length of about 50 meters.

The ditch is also small. With a general profile in a “V” shape, it has 1,5 meters wide and 1 meter deep. Inside and outside, pits were detected and excavated, revealing deposits with pottery, grinding stones and some lithic materials. Practically nothing was detected outside te negative structures.

But another interesting circumstance of Torrão is the fact that the enclosure is not exactly at the top of the hill. In fact, it only occupies the NE half of hilltop and the beginning of the slope in that side, sharing the other half with a (previous?) cromlech of also small menhirs. This cromlech was already very destroyed, but the distribution of the monoliths shows that both enclosures didn’t overlapped, a circumstance that could reflect, if not a contemporaneous function, knowledge and a respect for previous symbolic structures. In this context, it is also meaningful the proximity of a small (again) megalithic tomb (proto megalithic by Portuguese typological standards), located just some tens of meters way, in a lower platform of the hill.

Ten years ago, in Portugal, ditched enclosures were steel just settlements. It was in that context that Torrão was first published. But the evident proximity and relation to megalithic structures led the authors to consider the importance of symbolic meanings and ritual practices as main questions to put to the site in future research. Identity and ancestors were issues that emerged in the text at the end.

Today, facing the recent data and the different theoretical approaches, Torrão is a striking example of the limitations (not to say inaccuracy) of the undemanding interpretation of a significant number of these complex sites as simple fortified settlements (in a village sense).

0051 - Fraga da Pena’s job

As I have put it several times, heritage only exists when is socially activated and lived. Archaeology, like other sciences in general, has its social justification in the social recurrence that provides.

Prehistoric enclosures have a double emblematic role in this issue. In one hand they are a kind of heritage that needs to be known, comprehended and valued by people, as a main archaeological phenomenology to understand prehistoric communities of Neolithic and Chalcolithic. Second, as so many of them did in the past, they can be used to bring people together, generating aggregation, reinforcing identities and a general common sense of heritage preservation and recognition of its social values and roles.

This happed last Saturday at the walled enclosure of Fraga da Pena (Fornos de Algodres) for the 3rd time in six years.



As the scientific research saw it, this huge and magnificent granitic tor must have had stories, myths, associated to its existent and majestic domain over the local landscape. When the two walled enclosure were built, some 4200 years ago, this was already a “place”: a local with a name and a history (not a modern geological one, but a mythological one), part of the local landscape semantics.

How to pass this view of a group of rocks and stone walls to common rural local people and general public?



In the absence of a real one, a legend was created and published in 2005, using other local myths and the scientific discourse displayed about the site. The legend, in a more pleasant way, makes people understand that this was a special place for special social practices and important for past world views.



In that year the legend was theatrically played at Fraga da Pena, for local community. Last Saturday another show based on it was performed there, bringing more than 300 persons to the place and, in a way, restoring its earliest social function: aggregating people in social practices that reinforce identities and a sense of territoriality, developing a consciousness of common memories and senses of belonging and, in summary, making heritage doing its job.

0050 – Castelo Velho walled enclosure: a milestone.

Location: Vila Nova de Foz Côa municipality, Guarda district, North Portugal)
Chronology: Chalcolithic
Bibliographic references: Jorge, 1993; 1998; 2002a; 2002b; 2003.



Castelo Velho de Freixo de Romão. Image taken from here.

This walled enclosure, located in a hill top, was used as an instrument for a theoretical drift and for one of the first attempts (if not the first) to introduce a post processual approach in Portuguese Recent Prehistory and in the problematic of enclosures.

As the author puts it: “At first was interpreted along classic lines, as a fortified settlement (...).” (Jorge, 2002a, quoting Jorge, 1993). The next years would be of reinterpretation, questioning the traditional notion of fortified settlement and creating the notion of monuments for these kind of sites. Discussing the arguments, the empirical evidence, the theoretical coherence and fragilities of the framework or the academic contextual environment of this change, all of this would be too much for just a post in a blog. I will be doing it in future posts, as time goes by.

And analyse the consequences of this drift to the disciplinary debate would be no lesser problem. It would be so, if a natural debate happened. But in general, everyone fortified in their one theoretical frameworks (inclusive the newcomers); debate was avoided and substituted by sarcastic comments or back stage gossip; students were (and still are) formatted in the axioms of each “school” and invited to avoided heretical thoughts or practices.

In fact, if the new approach to enclosures, through a clear Anglo Saxon influence, tend to present them as places of social aggregation and identity management, as places intended to bring people together for social interaction, what happen in their contexts of research was a “theoretical fortification” of the different research schools. They enclosed themselves as “real” fortified settlements”, with purpose of defence and control (of their territory and respective inhabitants).

But as I recently put it, “Walls are built and walls fall down. For long, the approach to South Portugal Recent Prehistory was enclosed and protected from “wicked” European influences by high walls of strict empiricism or theoretical radicalism. Those walls stand, but they no longer enclose.”

As some other walled enclosures in the seventies and eighties, used to question cultural and diffusionists explanations in the light of functionalism and historical materialism, Castelo Velho was another milestone in the research of Portuguese enclosures. Not without “sin”, of course, for scientific practices are made by humans living in “sinful” human social contexts (and not by gods in Olympic laboratories).

0049 – The first wood henges in Iberia?

Well known in Europe, wood heges seem to be missing in Iberia. But just like ditched enclosures some years ago, I believe this is just a problem of research rather than a real circumstance.

A couple of years ago I came across with a context in Beira Alta (Central Portugal) in the Quinta da Assentada site that had a sequence of post holes and small ditches with several directions, sometimes cutting each other. This was overlapped by another sequence of alignments of rectangular pits. Unfortunately, the extent of the excavations didn´t allow a full comprehension of the plans suggested by those structures, but an essay of the eventual type of super structures was attempted.



Quinta da Assentada. View of the several small ditches and post holes, inclusively inside the ditches, and possible reconstitution (Valera, 2007)

More recently, the geophysical research done in several ditched enclosures and the reinterpretation of a excavated context, seem to reveal the presence of circular timber henges. This can be seen at Moreiros 2 and Outeiro Alto 2. In the later a possible wood henge was surrounded by three funerary hypogea and a pit grave. This context and interpretation will soon be published.



Circle of large post holes of a possible henge. The pits are equal to the ones that can be seen in the alignment of a possible palisade at the left, in Moreiros 2 (Becker, Valera & Boaventura, in print).

In fact, more situations like those will exist, but they can only be detected with open area excavation or good geophysics (and, of course, with a mind open to this possibility).

References:

Becker, H., Valera, A.C. and Boaventura, R. (in print), “Moreiros 2 (Arronches, Évora): magnetometry of a complex ditch and palisade enclosure”, poster to be presented at the IXIberian Congress of Archaeometry, Lisbon, 2011.

Valera, António Carlos (2007), Dinâmicas locais de identidade: estruturação de um espaço de tradição no 3º milenio AC (Fornos de Algodres, Guarda), Braga, CMFA/TA.

0048 – Portuguese Enclosures in International Congresses

In the following times and in the beginning of next year, Portuguese enclosures will be presented and discussed in international meetings.

At the next Annual Meeting of The European Association of Archaeologists, in a session dedicated to the problems of ditch filling, Cláudia Costa will present a paper based on the analysis of the faunal remains of the excavations of ditches 3 and 4 of Perdigões, in their contributions to the interpretation of the processes of the filling of those ditches. The title is: “Filling the ditches; faunal analysis based inferences on the stratigraphic sequence of Ditches 3 and 4 of Perdigões enclosure (Southern Portugal)”

Next month, in Rome, three communications will be presented that involve reflexion on Portuguese enclosures. Here is the programme:

STRATEGIE INSEDIATIVE E METALLURGIA
I RAPPORTI TRA ITALIA E LA PENISOLA IBERICA NEL PRIMO CALCOLITICO
Convegno Internazionale 6-7 ottobre 2011, Museo Nazionale Romano, Palazzo Massimo, Roma

Giovedì 6. 10. 2011
09:15 – H. von Hesberg, D. Marzoli, P. Petitti, M. Kunst, D. Steiniger: Discorso di saluto
I. Italia
10:00 – Daniela Cocchi Genick (Verona): L’Eneolitico in Italia: stato della ricerca, problematiche e prospettive
10:30 – Alberto Cazzella (Roma): Rapporti tra modelli di insediamento e metallurgia nella penisola italiana
11:30 – Patrizia Petitti (Roma): Necropoli e insediamenti nel Lazio settentrionale: la differenza delle fonti archeologiche
12:00 – Andrea Dolfini (Newcastle upon Tyne): La prima metallurgia in Italia centrale: nuove datazioni e interpretazioni
12:30 – Lucia Sarti – Fabio Martini (Siena/Firenze): Sesto Fiorentino: un “centro insediativo” nel Calcolitico
13:00 – PAUSA PRANZO
14:30 – Roberto Maggi – Marc Pearce (Genova/Nottingham): Transumanza, tecnica mineraria e metallurgia in Liguria
15:00 – Franco Nicolis (Trento): Strategie di insediamento e miniere in Italia settentrionale
II. Francia meridionale
16:00 – Marie Laroche – Paul Ambert (Sète): Découvertes du Programme Collectif International de Recherches (1996-2011) dans le district minier-métallurgique de Cabrières-Péret (Hérault, Sud de la France)
16:30 – Laurent Carozza (Toulouse): Tecnologia mineraria, metallurgia e strategie di insediamento nella Francia meridionale
17:00 – Luc Jallot (Montpellier): Insediamenti fortificati con metallurgia nella Languedoc
III. La penisola iberica
09:15 – Michael Kunst (Madrid): Stato della ricerca e cronologia nella penisola iberica
09:45 – Salvador Rovira (Valencia): La prima metallurgia nella penisola iberica
10:15 – Gert Goldenberg (Innsbruck): Copper ore deposits of southern Portugal and their relevance for the development of the region`s early metallurgy?
10:45 – José Enrique Martínez Romero (Málaga): Fossi circolari e insediamenti fortificati in Andalusia
11:30 – António Carlos Valera (Lissabon): Fossi circolari e insediamenti fortificati in Portogallo
12:00 – Rui Parreira – Elena Morán (Faro/Lagos): Alcalar e poblados fortificados no sul de Portugal
12:30 – Michael Kunst (Madrid): Zambujal e insediamenti fortificati in Portogallo centrale
IV. Il mediterraneo occidentale – uno spazio comunicativo
14:30 – Christian Strahm (Freiburg): The West-Mediterranean metallurgical drift
15:00 – Daniel Steiniger (Roma): L’interpretazione di modelli di distribuzione nel Calcolitico italiano
16:00 – Claudio Giardino (Roma): Relazioni nella metallurgia italiana e iberica
16:30 – Thomas Schuhmacher (Madrid): Scambio d’avorio nel Mediterraneo occidentale durante il Calcolitico
17:00 – Jean Guilaine (Carcassonne): Il Mediterraneo occidentale nel Calcolitico
17:30 – Discussione e sintesi

Next year, 23-25 March, at Oxford, a conference will be held having as issue:

HENGES – A LATE NEOLITHIC CONUNDRUM
Director of Studies: Dr Alex Gibson, University of Bradford and Jim Leary, English Heritage

Program:
Friday
8.00 pm An introduction to the study of henges: Time for a change, Alex Gibson
Saturday
9.00 am Josh Pollard - Avebury
10.00 am Jim Leary - Marden
11.30 am Kenny Brophy - Henging and mounding: the Forteviot henges
2.00 pm Keith Parfitt - Ringlemere
3.00 pm Wolfgang Neubauer - Kreisgrabenanlagen – Middle Neolithic ritual enclosures on the continent: 4800-4500BC
4.30 pm António Valera - Mind the gap: Neolithic and Chalcolithic enclosures of South Portugal
8.15 pm Jan Harding - Yorks henges
Sunday
9.15 am Muiris O’Sullivan - Irish Henges
10.15 am Nick Card - Orkney Enclosures
11.45 pm Richard Bradley - The later history of henges: the view from Northern Britain

0047 – Alto do Outeiro ditched enclosure

Location: Beja municipality, Beja district, Alentejo, South Portugal)
Chronology: Chalcolithic
Bibliographic references: Grilo, 2007

Located in a small hill, Alto do Outeiro was partially surveyed in an emergency context in 2005. Several pits and two ditches were identified. Ditch 1 had a “V” section with 2,20m wide and, 1,5 to 1,3m deep. It was filled with several deposits in a bowed way.



Section of ditch 1 (after Grilo, 2007)

Ditch 2 presented a wavy plan in the area excavated, and the filling was more complex than in ditch 1: stone drops and pits excavated in previous filling deposits were recorded.



Ditch 2 (after Grilo, 2007)

Geophysical prospection was done, but the results were relatively poor. Some pit area were detected and the plan of ditch 2 was interpreted as a sub rectangular shape of 20x18 m.



Part of the geophysical image (ditches area). (after Grilo, 2007)

The shape in the published image is not clear though, and the fact that the quality of the image is not the best associated to the wavy layout of the ditch might induce in error about the real plan of the enclosure. I have my doubts about a sub rectangular shape.

On the other hand, in the lower part of the image, two possible wavy ditches seem to be present, inclusively with and entrance.

0046 – Geophysics and archaeoastronomy of prehistoric ditched enclosures

This project developed by NIA-ERA and financed by Fundação Calouste Gulbenkian is reaching its final steps (it’s a two years project – 2010-2011).

The main goal was to analyse and establish the astronomic foundations of the architectonic design of several Portuguese Neolithic and Chalcolithic enclosures through their plans obtained by geophysics. The project, led by me, counted with the participation of Helmut Becker (as responsible for the geophysics) and Gracia Rodriguez e Javier Mejuto from Madrid Complutense University (responsible for the astronomic research). This general approach is absolutely new in Iberia regarding enclosures.

The ditched enclosures submitted to geophysics were: Moreiros 2; Xancra; Monte do Olival 1; Pombal; Luz 20. To these five sites three other were added: Perdigões (with its integral geophysics) and Santa Vitória and Outeiro Alto 2 (with their plans known through excavation). The preliminary results of the project will be soon presented in two meetings.

At the IX Iberian Congress of Archaeometry (ICA), to be held in Lisbon next October, in the section dedicated to geophysics, a communication and two posters will be presented:

“Magnetometry of Recent Prehistory ditch enclosures and Archaeoastronomy: results of a ongoing project” (António Carlos Valer, Helmut Becker, Javier Mejuto & Gracia Rodriguez)

“Moreiros 2 (Arronches, Évora): magnetometry of a complex ditch and palisade enclosure” (Helmut Becker, António Carlos Valera & Rui Boaventura) - Poster

“Xancra (Cuba, Beja): magnetometry of a possible prehistoric calendar” (Helmut Becker & António Carlos Valera) - Poster.

At the “Star and Stones” meeting dedicated to archaeoastronomy, to be held in Évora this September, we will present a paper:

“Ditcehd enclosures in Southern Portugal: an archaeoastronomical point of view of portuguese Neolithic and Chalcolithic (J. Mejuto, A. Valera, G. Rodríguez-Caderot & Helmut Becker)

Next year a monographic publication will be edited. But some papers are already available:

VALERA, António Carlos e BECKER, Helmut (2011), “Cosmologia e recintos de fossos da Pré-História Recente: resultados da prospecção geofísica em Xancra (Cuba, Beja)”, Apontamentos de Arqueologia e Património, 7, Lisboa, NIA-ERA, p.23-32.

Valera, A. Carlos e Becker, Helmut (in print), “Arqueoastronomia, geofísica e recintos de
fossos da Pré-História Recente no Sul de Portugal”, Xelb. Actas do 8º Encontro de Arqueologia
do Algarve, Silves, C.M.S.

0045 – Monte do Olival 1: a preliminary glimpse into the inside enclosures.

Here is a preliminary geophysical image obtained by Helmut Becker at Monte do Olival 1, in the context of the NIA-ERA project on archaeoastronomy of ditched enclosures directed by me and financed by Fundação Calouste Gulbenkian. The image reflects only the two inside ditches. There are at list more two.
There is still work to be done to improve the image (Helmut will be working on it), since geological interference is strong. But, once again, results are very good. Sinuous wavy ditches are present once more and the similarity to Xancra, Outeiro Alto 2 or Santa Vitória is striking, reinforcing the idea that the design of these particular wavy enclosures has specific patterns and meanings, responding to particular goals.
And the already stressed tendency for circularity and concentricity of these complexes of enclosures is also confirmed.

0044 - Enclosures and funerary contexts: Perdigões recent evidence

The association of ditched enclosures to funerary practices and contexts is increasing. A workshop on the matter is starting to be designed.

In the mean time, in Sector Q of Perdigões, the excavations of this Summer provided more evidences about cremations. Several deposits revealed several hundred (not to say thousands) fragments of scattered human burned bones, associated to burned artefacts, mainly harrow heads and ivory idols (or other ivory artefacts not identifiable).

Two interesting aspects of those contexts can be stressed. One is the presence of small human burned bones: phalanges, for instance, are numerous. This reflects a particular careful on the translation of the burned remains from the original cremation place.


Deposit of burned human bones with ivory idols.

The other is the particular association of these remains to specific idols: limestone decorated idols (with the eyes and facial tattoos) and ivory anthropomorphic idols, known in South Spain, but until now absent in Portugal. I’m talking about: idols with a head with ears, nose, eyebrows, eyes, facial tattoos; hair going down the back; harms with hands crossing over the belly, sometimes holding a symbolic tool; sexual indication; well defined legs and buttocks. Some can reach an outstanding level of perfection and aesthetic significance.




Ivory anthropomorphic idols.

Food for thought. Not just about Chalcolithic funerary practices (where cremation starts to get some importance), but also about the social role of some ditched enclosures, especially in their relations to funerary practices.

0043 – Moita da Ladra walled enclosure

Location: Vila Franca de Xira municipality, Lisboa district, Estremadura, Central Portugal)
Chronology: Chalcolithic (with a previous occupation of Early Neolithic)
Bibliographic references: Cardoso, 2010.

The hill where the site is, with the Tagus River valley behind (after Cardoso, 2010)

Located on a hilltop that dominates the lower Tagus river valley, this site presents a walled enclosure dated from plain/final Chalcolithic. The chronology is deduced by the presence of the locally characteristic decorated pottery (“Folha de Acácia” type), bell beaker vessels and copper and gold artefacts (Palmela point, gold decorated plate and object related to metallurgical work).

The stone wall is considered to represent a unique built phase, defining an ellipsoidal enclosure (44m x 80m), with an entrance in the South side (facing the Tagus River). It was built with local basalt rocks, but also with limestone, brought uphill from the bottom of the mount. Those limestone blocks were especially used in the wall faces (the middle was filled in basaltic rocks). The white of the limestone walls would have generated a strong visual contrast in the top of the dark volcanic hill.

Plan of the enclosure (after Cardoso, 2010)

That strategy of visibility is stressed by the author in the context of a territorial and circulation control between the Tagus valley and the hinterland of Lisbon Peninsula (as would represent the Zambujal walled enclosure in the other side of the Peninsula – the sea side). A settlement-fortress of a regional strategy of occupation, defence and control.

Nearby is the Verdelha dos Ruivos cave, used for Bell Beaker funerary depositions and related with the enclosure as its possible necropolis. The same hypothesis is developed for some local megalithic tombs (as Casal do Penedo ).

0042 – Where have all the flowers gone?

Carrascal (Porto Torrão) ditch excavated by ERA Arqueologia (responsibility of Helena Santos)

I frequently remember the name of this song when I think about all of the geological material that was extracted in the processes of building ditches. Where have all the tons of geological material gone?

As I’ve said before, we completed this year a cross section in Ditch 6 of Perdigões, dated from Late Neolithic. This, combined with the plan obtain by geophysics, allows us to estimate the volume of bedrock extracted. Assuming similar shape and measures (sometimes they change along the ditches) of Ditch 6, that has almost a two hundred meters perimeter, the building process implied the excavation and removing of about 745 m3 of geological material (I will also calculate the weight).

I will deal later with the questions of logistics, labour and technical problems. For now I just renew the question: where is it?

Traditionally is assumed, I repeat assumed, that bank walls were built with that material, later eroded. The problem is that there are no evidences of that erosion in any of the already surveyed ditches at Perdigões (as in other Portuguese enclosures). They simply are filled with different materials (with exceptions for small erosion of ditch walls, as we can observe in a specific point of Ditch 6).

But the geological is also not outside the ditches, not even in Perdigões, that is topographically an amphitheatre, with the pendent orientated to the inside and East. Ditch 6 is in the centre of the natural amphitheatre. If there was a bank by the inside of the ditch built with the geological material there should be evidences of it. There are not.

If we think that at Perdigões are at least 11 ditches, progressively bigger than Ditch 6, we start to have an idea of the quantity of geological material removed there over time. Thousands of cubic meters; thousands of tons (it is now possible to also estimate the volumes for ditches 1, 3 and 4).

Where is it?

0041 – Late Neolithic ditch at Perdigões enclosure

In this year campaign we reach the base of Ditch 6 (the inner one) of the complex of ditched enclosures of Perdigões. It is 3 meters wide at the top, 2 meters deep and has a “u” section.
From bottom to top provide mainly faunal remains and pottery, addressed to Late Neolithic (second half of the 3rd millennium BC).
















The processes of ditch filling of this section is different from the ones observed in Sector I, in Ditches 3 and 4, dated from plane Chalcolithic. As in Ditch 3 a significant change has been observe in the first half of the ditch, regarding the second (upper) half, separated by a moment of local erosion of the western wall of the ditch (not extendable to the entire surveyed area). In the lower part we have basically horizontal layers, with a moment of organized depositions of stones. After the wall erosion period, we have diagonal sedimentation pending from west (from the outside of the enclosure), including moments of formation of stone layers with the same pending.




















The interpretation of this filling is still yet to be done (excavation just finished). But it is clear that the process had different phases (with different conditions) and doesn´t present clear structured depositions as can be observed in Ditches 3 and 4 (Mind that we are talking about small section of long ditches). Nevertheless, is a big ditch by Late Neolithic standards, only overcame in Portugal by one of the ditches excavated at Porto Torrão (Valera & Filipe, 2004).