Showing posts with label Porto Torrão. Show all posts
Showing posts with label Porto Torrão. Show all posts

Friday, June 21, 2019

0420 - New image of ditches at Porto Torrão


The overlapping of two different images allowed the identification of several sections of ditches in the large archaeological complex of Porto Torrão (Ferreira do Alentejo, Beja). Some are the continuation of ditches already surveyed (dotted lines), but others correspond to new ditches that define central enclosures, where at least one gate is visible.

This image was published in the book dedicated to the tholoi tomb of Cardim 6, available for download here.

Wednesday, February 24, 2016

0334 - Human remains in ditches at Porto Torrão

The revision that is being done to materials from the excavations of Era Arqueologia in Porto Torrão is providing new information.


As in other ditches of the site, the Chalcolithic ditch 2 has also human remains deposited together with faunal remains and other archaeological materials.
 

 
The deposition of scattered human remains in ditches is a practice that is being more and more frequent in Iberian large enclosures, such as Perdigões, Valencina de la Concepción, Pijotilla and naturally Porto Torrão. Something that is well known in European ditched enclosures, confirming social practices that have a wide distribution, possibly related to shared cosmologies at a large scale.

Sunday, January 17, 2016

0326 – Portuguese ditched enclosures in intercontinental project


After obtaining the approval and funding for a FCT project on mobility, the enclosure of Perdigões (but also others that were researched by Era Arqueologia, like Bela Vista 5 and Porto Torrão) will be part of an intercontinental research project on prehistoric mobility. The project, titled “Beyond migration and diffusion: The prehistoric mobility of people & ideas”, is funded by the Australian Research Council and has a leading team composed by Catherine Frieman, Rainer Grun, Matthew Springgs, Rachel Wood (from Australian National University), Mathieu Duval (from Centro Nacional de Investigación sobre Evolución Humana, Spain) and António Valera (Era Arqueologia, S.A.).

The main goal is to see how the movement of individuals and groups of people is both an instigator and a response to sociocultural change, utilizing both key European and Pacific Island examples to help build a truly comparative archaeology of rapid social and economic change, with pertinence to general theories of innovation and adoption.

Tuesday, December 1, 2015

0320 - Issues from Porto Torrão



In 2002 two sections in two ditches of Porto Torrão were excavated by Era Arqueologia (Valera, Filipe, 2004; Valera, 2013). In that area the ditches are just 8 meters apart. For the inner one (ditch 1), material culture and radiocarbon dating say that it was open and filled almost to the top during Late Neolithic (end of the 4th millennium BC/transition to the 3rd). The last filling deposits, though, are from Late Chalcolithic. The outside one (ditch 2) was open by the middle of the 3rd millennium BC and the filling went on until the end of the millennium (according to radiocarbon dating). That means that when the outside ditch (ditch 2) was opened the inner one (ditch 1) was visible and not completely filled, what just happened in simultaneity with the later filling of ditch 2. So, why opening a new ditch just 8 meters apart, having to excavate bedrock, when a previous ditch was just there, visible and easier to re-excavate? Well prehistoric communities do not respond to modern principles of effort-profit and this particular situation (together with many others in other ditched enclosures) should make people, at least, wondering.

References:

Valera, António Carlos e Filipe, Iola (2004), "O povoado do Porto Torrão (Ferreira do Alentejo): novos dados e novas problemáticas no contexto da calcolitização do Sudoeste peninsular", Era Arqueologia, 6, Lisboa, ERA Arqueologia/Colibri, p.28-61.

Valera, A.C. (2013), “Cronologia absoluta dos fossos 1 e 2 do Porto Torrão e o problema da datação de estruturas negativas tipo fossos”, Apontamentos de Arqueologia e Património, 9, Lisboa, Nia-Era, p.7-11.



Friday, July 5, 2013

0195 – Necropolis and ditched enclosures

One of the outstanding monuments of the Alcalar peripheral necropolis.

One of the particularities of large ditched enclosures in south Portugal (and south Spain) is the presence, especially during the chalcolithic, of peripheral necropolis, sometimes organized in clusters, with large funerary monuments, namely tholoi. In Alentejo we have them documented in Perdigões and Porto Torrão, and suspected in Salvada and Monte das Cabeceiras 2. But the most monumental ones are surrounding the ditched enclosure of Alcalar in Algarve. Although they don’t reach the monumentality of some monuments of Andalucia (like the ones of Valencina de la Concepción or Antequera), they are impressive anyway.

The way these monuments were articulated with the ditched enclosures is still not clear. In fact, most of these enclosures are not clear themselves, namely in their plans. At Perdigões, however, we have a little more information about that relation. It seems now that the two tholoi already excavated were initially outside the enclosed area. Latter they were enclosed by the outside ditched, that makes a particular turn to embrace them, and one was reused.


But the specific relations between the dynamics of use of enclosures and the dynamics of use of the surrounding monuments is still badly documented and insufficiently researched. So speculation prevails.   

Tuesday, May 21, 2013

0185 – “Structured depositions” in pits and ditches

Porto Torrão ditched enclosure. Exacavation of ERA Arqueologia in 2002 (Valera & Filipe, 2004)

This is an issue present in every ditched enclosure, not only related to the ditch fillings, but also to the pit ones.

There, we can frequently find totally articulated bodies, articulated parts of bodies or scattered bones of animals (or humans). The question, for some time now is always the same: “Is it ritual or rubbish?” (Hill, 1996)

An example is the depositions of some animal bones in a pit between two ditches at Porto Torrão (Valera & Filipe, 2004). There some jaws of different animals and part of a horse limb in anatomical connection were recorded between several small stones. “Is it ritual or rubbish?”


Porto Torrão ditched enclosure. Exacavation of ERA Arqueologia in 2002 (Valera & Filipe, 2004)

The problem here is the traditional difficulty of dealing with human intention in Prehistoric Archaeology and the debate around the expression “structured depositions”.

This expression has been used to fill a semantic emptiness that results from the critics to the use of the modern concept of garbage applied to these contexts. That criticism is supported in the idea that what is today not sacred and understood as waste in a mechanical negligible way, without meaning, might, in different social contexts be of profound significance. Then, structure deposition is a concept that emerges to avoid an impetuous projection of modern reference systems to the past, allowing other reasons to emerge. Nevertheless, as Olsen (2000) stresses, it tells us little about those reasons.

The questions remains; what means an articulated limb of a horse in a pit, associated to two jaws (of a pig and of a possible sheep)?

Recently, taking into consideration the association of animal limbs to human funerary contexts, I and a colleague argued around a possible answer (Valera & Costa, in press):  

Because of these particular ontological frames, archaeology should pay equal attention to animal remains as it does to human remains in archaeological survey (Olsen 2000): orientation, position, represented parts of the body, conditions of those parts, individual attributes (e.g. age, gender, size, pathologies) and contextual associations. Only then will it be possible to detect patterns that allow us a glimpse into their world view that are not restricted to simple economics.

In this context the abundance of limbs or parts of limbs stresses the importance of segmentation, also present in practices involving human bodies, certain categories of artefacts and even the communities, so appropriately called segmentary societies.  Segmentation seems to be a social strategy of significant importance to societies in Recent Prehistory (Valera 2010).

The problem of segmentation is related to the problem of the relation between the part and the whole, and to the different value attributed to the degrees of physical integrality developed in different mental frames. As J. Chapman (Chapman 2000; Chapman & Gaydarska 2007) argued for the fragments of artefacts, we consider that the part and the whole may assume the same symbolic role (through an ontological parity), allowing that the part, by participating of the essence of the whole, to play the social role of maintaining connection between people or between people and places or events. When a part is present, that does not necessarily mean the occurrence of post depositional activities that disordered the original context. On contrary, we must consider the possibility of an intentional segmentation and that the part was deposited as so. But because of the principle of psychological participation, that part (a fragment of a pot, a paw of an animal) may be evocative of bonds between persons and events. For instance, to a ceremony involving the burial, to previous events that were important to the group, even to events to happen in the future or maintaining bonds to the social role and power of an object or animal.

As argued elsewhere (Valera 2008), this is a cognitive mechanism where the psychological principle of participation works allowing essential properties of the whole to be participated by the part, establishing a homology between them. It is the principle of the sacred water, where each segment represents the whole body of Christ and not a part of it. Segmentation is a structural process, where the need to segmentation and sharing and redistributing essences plays an important role in renewing and perpetuating the social and cosmological order (Fowler 2004).

In this context, the fragment of a body acquires a quite different social potential and presents challenging problems to our perception of the relations between the part and the whole, and to our concept of unity. To us, those relations are conformed by Cartesian geometry that establishes dichotomies between complete/incomplete; whole/part; orientated/disorientated, valuing and attributing meaning to the first and insignificance to the second.  This would not be the most appropriate mental frame to deal with other mental schemes, based in different categories and world views. Fragments should not be devalued, for they have the potential to establish and maintain bonds, assuming relevant social roles. “ (Valera & Costa, in press)

Bibliographic References
Chapman, J. 2000. - Fragmentation in Archaeology: people, places and broken objects in the Prehistory of South-Eastern Europe, London, Routledge.
Chapman, J. & Gaydarska, G. 2007. - Parts and wholes: fragmentation in prehistoric context Oxbow Books.
Fowler, C. 2004. - The archaeology of personhood. An anthropological approach London, Routledge.
HILL, James D. (1996), “The identification of ritual deposits of animals: a general perspective froam a specific study of ‘special animal deposits’ from the Southern English Iron Age”, (S.Anderson e K. Boyle, Eds.) Ritual treatment of human and animal remains, Oxford, Oxbow Books, p.17-32.
Olsen, S. L. 2000. -The secular and sacred roles of dogs at Botai, North Kazakhstan Crockford, S. (ed) Dogs through time: an archaeological perspective Oxford, Bar International Series : 71-92.
Valera, A. C. 2008 - Mapeando o Cosmos. Uma abordagem cognitiva aos recintos da Pré-História Recente, ERA Arqueologia 8 Lisboa, Era Arqueologia/Colibri : 112-127.
Valera, A.C. & Costa, C. (in press), “Animal limbs in funerary contexts in southern Portugal and the segmentation problem”.
Valera A.C. & Filipe, I. (2004), "O povoado do Porto Torrão (Ferreira do Alentejo): novos dados e novas problemáticas no contexto da calcolitização do Sudoeste peninsular", Era Arqueologia, 6, Lisboa, ERA Arqueologia/Colibri, p.28-61.

Friday, March 22, 2013

0169 – Ditches and Funerary Practices



Ditch and entrances to hypogea crypts in the north wall.

At Carrascal 2, near Porto Torrão complex of enclosures, a chalcolithic ditch was partially excavated by ERA Arqueologia S.A. and raveled an uncommon situation.  

The ditch, with 2 meters deep and about 4 meters wide, presented a base sectioned in rectangular shapes with a fireplace and in the north side a sequence of hypogea, at least two of them with access through entrances excavated from the side wall of the ditch.

One of the entrances was close by an agglomeration of stones and another by a schist slab. The first third of the filling of the ditch revealed several layers of pavements of circulation, revealing that the ditch functioned as an access atrium to the hypogea.

Over the last pavement, two depositions of human cremation remains were recorded, demonstrating the importance of this specific funerary practice in the 3rd millennium C, just like is being corroborated in Perdigões enclosure.

This kind of articulation of ditches and funerary crypts is new in Iberian Chalcolithic, but shows how diversified practices and structures related to death can be in this period, namely in the areas of the large complexes of ditched enclosures.

A preliminary paper on this context (still in press) can be obtained here

Bottom of the ditch and sequence of circulation pavements with the detail of a deposition of a shell at the entrance of the central hypogeum.

Friday, March 8, 2013

165 - Are they similar?


(By Filipa Rodrigues, frodrigues@crivarque.net,)

When I first saw the image of the Perdigões geophysics, I was digging the Porto Torrão (Ferreira do Alentejo, Beja) ditched enclosures as part of the mitigation work related to the setup of an irrigation component of the Alqueva reservoir (EDIA, SA). This work brought together a number of archaeological consultancies (Crivarque, Neoépica and Archeoestudos).

A monumental double ditch system, which encloses an estimated area of 70 ha, was identified during this work.

In one of the sectors whose excavation took place under my responsibility (Sector 3 East), the architecture of these monumental structures can be briefly described as:

  1. Outer Ditch (Ditch II) → Width - 12m; Depth – 6m; Profile – tending to a V-shape;
  2. Inner Ditch (Ditch I) → Width – 8,5m; Depth – 5,50m; Profile – tending to a U-shape.

The Sector 3 East excavation revealed parallel and concentric ditches ca. 30m apart. Dimensions aside, these features are similar to most known ditched enclosures; however the Porto Torrão double ditch system is distinct in one important aspect: the existence, every 25 m, of small tunnels interconnecting both ditches.


Therefore, I interpret these ditches as a single feature, not as two separate and independent constructions, one meant to fulfill a common purpose. Subsequently, but within the time range of the Copper Age, these features’ original function became obsolete and they were filled-up. Their original purpose and the reasons behind their deactivation in Copper Age times remain open questions

In the area of the site under my responsibility it was not possible fully to excavate these tunnels; in the area under the responsibility of the Neoépica consultancy (whom I thank, and Raquel Santos especially so, for the information), the connection of the ditches by tunnels has been confirmed.

In aerial photography, the layout of the Porto Torrão features reminds the images returned by the Perdigões geophysics:



So, the question that I have for now is: are they similar?

You can also see an excavation video here: http://www.youtube.com/watch?v=Ql3JinQEGeg


Wednesday, September 12, 2012

0107 - The small enclosure of Carrascal (Porto Torrão)



It was a project developed by Era Arqueologia, and the geophysics was, of course, done by Helmut Becker with the results he usually provides.

Just 800 meters way from Porto Torrão traditional limits, and associated to a large area of necropolis, here is a small and perfectly circular ditched enclosure, with just 20m diameter.

A gate is visible at NW, possible orientated to sunset summer solstice.

At Porto Torrão things are much more complex than everybody expected and, I would argue, still expect.

Saturday, October 22, 2011

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).

Tuesday, June 14, 2011

0029 - Porto Torrão ditched enclosure

Late Neolithic ditch (left) and Chalcolithic ditch (right)

Location: Ferreira do Alentejo municipality, Beja district, Alentejo, South Portugal)
Chronology: Late Neolithic and Chalcolithic
Bibliographic references: (Arnaud, 1993; Valera & Filipe, 2004; Valera, 2010; Valera et.al. in press)

Porto Torrão is known as a large Chalcolithic site since the eighties of the last century (Arnaud, 1983), but only in 2002 it became clear it corresponded to a complex set of ditched enclosures.

The excavations that detected the presence of ditches for the first time were conducted in a context of emergency Archaeology (Valera & Filipe, 2004), related to the building of a high voltage electricity line. The excavation of the area of one of the pillars of the line revealed two parallel ditches, separated only by eight meters (a space where some pits were also identified and excavated).

Although the ditches were close to each other, they were from different chronologies. The inner one was filled almost to the top by sediments with Late Neolithic materials and the outer one with materials from Chalcolithic, with the presence of Bell Beaker almost from the beginning of sedimentation.

The Late Neolithic ditch is 3,5 meters wide and 3 meters deep and the Chalcolithic one 5,9 meters wide and 3,4 meters deep. In the first one, some pits were identified inside the ditch, opened along the filling sediments.

More recently, again in a context of emergency Archaeology, other ditches were identified, and several necropolis of tholoi and hypogea were detected around the enclosures (Valera, 2010; Valera et al., in press). The limits and the design of the enclosures and necropolis are not yet known, but the general image points to a large complex and one of the biggest of Iberia.

Peripheral necropolis of tholoi and hypogea (a particular structure is a ditch function as an atrium of access to several the funerary chambers through passages excavated in the ditch wall. Inside the ditch, several pavements of circulation were identified). (Image published in Valera, in press,in, Michael Kunst, Roland Gauβ, Martin Bartelheim eds., Vom Erz zum Kupferartefakt. Metallurgie des 3. Jahrtausends in Zambujal und im Südwesten der Iberischen Halbinsel, DAI, Madrid.)