Wendy Matthews

Droughts have had large impacts on past and present societies. High-resolution paleoclimate data are essential to place recent droughts in a meaningful historical context and to predict regional future changes with greater accuracy. Such records, however, are very scarce in the Middle East in general, and the Fertile Crescent in particular. Here we present a 2400 year long speleothem-based multiproxy record from Gejkar Cave in northern Iraq. Oxygen and carbon isotopes and magnesium are faithful recorders of effective moisture. The new Gejkar record not only shows that droughts in 1998–2000 and 2007–2010, which have been argued to be a contributing factor to Syrian civil war, were extreme compared to the current mean climate, but they were also superimposed on a long-term aridification trend that already started around or before 950 C.E. (Common Era). This long-term trend is not captured by tree ring records and climate models, emphasizing the importance of using various paleoclimate proxy data to evaluate and improve climate models and to correctly inform policy makers about future hydroclimatic changes in this drought-prone region.

The aim of this paper is to show how micromorphology is able to furnish information with the degree of precision necessary for analysing site formation processes and traces of activities in a variety of settings. Use of large resin-impregnated thin sections allows contextual ...

Determining the internal layout of archaeological structures and their uses has always been challenging, particularly in timber-framed or earthen walled buildings where doorways and divisions are difficult to trace. In temperate conditions however, soil formation processes may hold the key to understanding how buildings were used. The abandoned Roman town of Silchester, UK, provides a perfect case study for testing a new approach combining experimental archaeology and micromorphology. The results show that this technique can resolve previously uncertain features of urban architecture such as the presence of a roof and the changes in internal organisation and use over time.

Experimental buildings at Butser Ancient Farm and St. Fagans (UK) and Lejre (Denmark) were sampled to investigate micromorphology of known activity areas, to contribute to our understanding of the internal use of space in excavated buildings and formation processes of house floor deposits. The experimental buildings provided important information relating to activity residues and sediments over the 16 years that the buildings were in use. Specifically, these results contribute to our understanding of the routes and cycles for transportation of materials in occupation contexts, which can be used to inform archaeological studies. It has been possible to identify internal ‘hot spots’ within the buildings for the deposition of activity residues and for the formation of specific deposit types. Analysis also highlighted post-depositional alterations occurring in internal occupation deposits, which has provided a means of identifying roofed and unroofed spaces in the archaeological record.

A range of archaeological samples have been examined using FT-IR spectroscopy. These include suspected coprolite samples from the Neolithic site of Çatalhöyük in Turkey, pottery samples from the Roman site of Silchester, UK and the Bronze Age site of Gatas, Spain and unidentified black residues on pottery sherds from the Roman sites of Springhead and Cambourne, UK. For coprolite samples the aim of FT-IR analysis is identification. Identification of coprolites in the field is based on their distinct orange colour; however, such visual identifications can often be misleading due to their similarity with deposits such as ochre and clay.For pottery the aim is to screen those samples that might contain high levels of organic residues which would be suitable for GC–MS analysis.The experiments have shown coprolites to have distinctive spectra, containing strong peaks from calcite, phosphate and quartz; the presence of phosphorus may be confirmed by SEM–EDX analysis. Pottery containing organic residues of plant and animal origin has also been shown to generally display strong phosphate peaks. FT-IR has distinguished between organic resin and non-organic compositions for the black residues, with differences also being seen between organic samples that have the same physical appearance.Further analysis by GC–MS has confirmed the identification of the coprolites through the presence of coprostanol and bile acids, and shows that the majority of organic pottery residues are either fatty acids or mono- or di-acylglycerols from foodstuffs, or triterpenoid resin compounds exposed to high temperatures. One suspected resin sample was shown to contain no organic residues, and it is seen that resin samples with similar physical appearances have different chemical compositions.FT-IR is proposed as a quick and cheap method of screening archaeological samples before subjecting them to the more expensive and time-consuming method of GC–MS. This will eliminate inorganic samples such as clays and ochre from GC–MS analysis, and will screen those samples which are most likely to have a high concentration of preserved organic residues.

Samples containing red pigment have been collected from two different archaeological sites dating to the Neolithic (Çatalhöyük in Turkey and Sheikh-e Abad in Iran) and have been analysed by a range of techniques. Sub-samples were examined by IR spectroscopy and X-ray diffraction, whilst thin sections were studied using optical polarising microscopy, synchrotron based IR microscopy and environmental scanning electron microscopy with energy dispersive X-ray analysis. Thin layers of red paint in a wall painting from Çatalhöyük were found to contain ochre (hematite and clay) as well as an unexpected component, grains of red and colourless obsidian, which have not been identified in any previous studies of the wall paintings at Çatalhöyük. These small grains of obsidian may have improved the reflective properties of the paint and made the artwork more vivid in the darkness of the buildings. Analysis of a roughly shaped ball of red sediment found on a possible working surface at Sheikh-e ...

Wall plaster sequences from the Neolithic town of Çatalhöyük have been analysed and compared to three types of natural sediment found in the vicinity of the site, using a range of analytical techniques. Block samples containing the plaster sequences were removed from the walls of several different buildings on the East Mound. Sub-samples were examined by IR spectroscopy, X-ray diffraction and X-ray fluorescence to determine the overall mineralogical and elemental composition, whilst thin sections were studied using optical polarising microscopy, IR Microscopy and Environmental Scanning Electron Microscopy with Energy Dispersive X-ray analysis. The results of this study have shown that there are two types of wall plaster found in the sequences and that the sediments used to produce these were obtained from at least two distinct sources. In particular, the presence of clay, calcite and magnesian calcite in the foundation plasters suggested that these were prepared predominantly from a marl source. On the other hand, the finishing plasters were found to contain dolomite with a small amount of clay and no calcite, revealing that softlime was used in their preparation. Whilst marl is located directly below and around Çatalhöyük, the nearest source of softlime is 6.5km away, an indication that the latter was important to the Neolithic people, possibly due to the whiter colour (5Y 8/1) of this sediment. Furthermore, the same two plaster types were found on each wall of Building 49, the main building studied in this research, and in all five buildings investigated, suggesting that the use of these sources was an established practice for the inhabitants of several different households across the site.

Three ochre samples (A (orange-red in colour), B (red) and C (purple)) from Clearwell Caves, (Gloucestershire, UK) have been examined using an integrated analytical methodology based on the techniques of IR and diffuse reflectance UV-visible-NIR spectroscopy, X-ray diffraction, elemental analysis by ICP-AES and particle size analysis. It is shown that the chromophore in each case is haematite. The differences in colour may be accounted for by (i) different mineralogical and chemical composition in the case of the orange ochre, where higher levels of dolomite and copper are seen and (ii) an unusual particle size distribution in the case of the purple ochre. When the purple ochre was ground to give the same particle size distribution as the red ochre then the colours of the two samples became indistinguishable. An analysis has now been completed of a range of ochre samples with colours from yellow to purple from the important site of Clearwell Caves.

Ochre samples excavated from the neolithic site at Catalhöyük, Turkey have been compared with "native" ochres from Clearwell Caves, UK using infrared spectroscopy backed up by Raman spectroscopy, scanning electron microscopy (with energy-dispersive X-rays (EDX) analysis), powder X-ray diffraction, diffuse reflection UV-Vis and atomic absorption spectroscopies. For the Clearwell Caves ochres, which range in colour from yellow-orange to red-brown, it is shown that the colour is related to the nature of the chromophore present and not to any differences in particle size. The darker red ochres contain predominantly haematite while the yellow ochre contains only goethite. The ochres from Catalhöyük contain only about one-twentieth of the levels of iron found in the Clearwell Caves ochres. The iron oxide pigment (haematite in all cases studied here) has been mixed with a soft lime plaster which also contains calcite and silicate (clay) minerals.

Determining the internal layout of archaeological structures and their uses has always been challenging, particularly in timber-framed or earthen walled buildings where doorways and divisions are difficult to trace. In temperate conditions however, soil formation processes may hold the key to understanding how buildings were used. The abandoned Roman town of Silchester, UK, provides a perfect case study for testing a new approach combining experimental archaeology and micromorphology. The results show that this technique can resolve previously uncertain features of urban architecture such as the presence of a roof and the changes in internal organisation and use over time.

Effects of climate on societies are a much discussed topic in archaeology, and especially relevant for semi-arid regions such as the Near East. The potentially most pronounced cold-arid climatic episode of the Holocene occurred at around 8200 years ago (‘8.2 ka event’). A similar event, albeit of a smaller magnitude, took place at around 9200 years ago. Due to the abrupt nature of these climatic changes (onset in less than a decade), a severe impact on societies is expected. The effects of especially the 8.2 ka event have been much discussed, and scenarios for the Near East vary from widespread site abandonment and migration to continuity of occupation. The aim of our study is to further this debate by a comprehensive re-assessment of chronologies, to assess the synchronicity of social and climatic changes.
We re-assessed all available radiocarbon evidence for the relevant time period (9500-7500 cal BP), strictly quality-checking dates and where possible using Bayesian models, and combining dating evidence with archaeological information. Our results show that no systematic, large-scale site abandonment or migration took place at the time of either the 9.2., or the 8.2 ka event. At some sites, change occurs, which represent climate adaptations, but a large variability is present. We conclude that early farming communities were resilient in the face of climatic and environmental deterioration.

The Eastern Fertile Crescent region of western Iran and eastern Iraq hosted major developments in the
transition from hunter-forager to farmer-herder lifestyles through the Early Neolithic period, 10,000-7000
BC. Within the scope of the Central Zagros Archaeological Project, excavations have been conducted
since 2012 at two Early Neolithic sites in the Kurdistan region of Iraq: Bestansur and Shimshara. Bestansur
represents an early stage in the transition to sedentary, farming life, where the inhabitants pursued a mixed
strategy of hunting, foraging, herding and cultivating, maximising the new opportunities afforded by the
warmer, wetter climate of the Early Holocene. They also constructed substantial buildings of mudbrick,
including a major building with a minimum of 65 human individuals, mainly infants, buried under its
floor in association with hundreds of beads. These human remains provide new insights into mortuary
practices, demography, diet and disease during the early stages of sedentarisation. The material culture of
Bestansur and Shimshara is rich in imported items such as obsidian, carnelian and sea-shells, indicating
the extent to which Early Neolithic communities were networked across the Eastern Fertile Crescent and
beyond. This volume includes final reports by a large-scale interdisciplinary team on all aspects of the results
from excavations at Bestansur and Shimshara, through application of state-of-the-art scientific techniques,
methods and analyses. The net result is to re-emphasise the enormous significance of the Eastern Fertile
Crescent in one of the most important episodes in human history: the Neolithic transition.

The Eastern Fertile Crescent region of western Iran and eastern Iraq hosted major developments in the transition from hunter-forager to farmer-herder lifestyles through the Early Neolithic period, 10,000-7000 BC. Within the scope of the Central Zagros Archaeological Project, excavations have been conducted since 2012 at two Early Neolithic sites in the Kurdistan region of Iraq: Bestansur and Shimshara. Bestansur represents an early stage in the transition to sedentary, farming life, where the inhabitants pursued a mixed strategy of hunting, foraging, herding and cultivating, maximising the new opportunities afforded by the warmer, wetter climate of the Early Holocene. They also constructed substantial buildings of mudbrick, including a major building with a minimum of 78 human individuals, mainly infants, buried under its floor in association with hundreds of beads. These human remains provide new insights into mortuary practices, demography, diet and disease during the early stages of sedentarisation. The material culture of Bestansur and Shimshara is rich in imported items such as obsidian, carnelian and sea-shells, indicating the extent to which Early Neolithic communities were networked across the Eastern Fertile Crescent and beyond. This volume includes final reports by a large-scale interdisciplinary team on all aspects of the results from excavations at Bestansur and Shimshara, through application of state-of-the-art scientific techniques, methods and analyses. The net result is to re-emphasise the enormous significance of the Eastern Fertile Crescent in one of the most important episodes in human history: the Neolithic transition.