Keith Wilkinson

Reconciling the roles of climate and tectonics in Late Quaternary fan development on the Spartan piedmont, Greece

Abstract The evolution of five alluvial fan systems is discussed in relation to chronology and possible tectonic and climatic triggering mechanisms. Two types of fan have evolved on the Spartan piedmont, Greece. First relatively large, low-angle fans, comprising four segments (Qf1–Qf4) composed of debris-flow and hyperconcentrated-flow deposits, with fluvial sediments restricted to the upper deposits of the distal segments. Second small, steep telescopically segmented fans, which consist of three segments (Qf1–Qf3), formed predominantly by debris-flow and hyperconcentrated-flow deposits. Morphological analysis of surface soils coupled with mineral magnetic and extractable iron (Fed) analyses of B-horizons suggest that individual segments can be correlated across the piedmont and have equivalent age. Luminescence dating of fine-grained deposits suggests that Qf1 segments formed during marine isotope stage (MIS) 6, Qf2 segments during MIS 5, Qf3 segments during MIS 4–2, and Qf4 segments during MIS 2 and 1. Tectonics has exerted a limited influence on fan systems. Regional uplift provides the gross relief conducive for fan development. The locations of fans were determined by transfer faults of Tertiary age, while Quaternary faulting initiated short phases of fan incision. Climate change as manifested by cycles of aridity and low vegetation cover during stadials, and humidity and deciduous woodland during interglacials and interstadials, played a key role in fan evolution during the later Middle and Upper Pleistocene. Aggradation occurred during stadials, with minor deposition and intermittent erosion during most interstadials, and entrenchment during the interglacials and longer interstadials. Deposition during the Holocene is limited in extent.

Hovk 1 and the Middle and Upper Paleolithic of Armenia: a preliminary framework

The territory of present day Armenia is a geographic contact zone between the Near East and the northern Caucasus. Armenian Middle and Upper Paleolithic records are both few and patchy as a result of the historical paucity of systematic archaeological research in the country. Consequently, it is currently difficult to correlate the Armenian Middle and Upper Paleolithic records with those from other neighboring regions. We present new archaeological and chronometric data (luminescence, U-Th, and 14C) from our ongoing research at Hovk 1 Cave in northeast Armenia. We discuss in particular two activity phases in Hovk 1 Cave for which we have outline chronometric data: (1) an early Middle Paleolithic occupational phase, dated by optically stimulated luminescence (OSL) to 104+/-9.8 ka BP(OSL); and (2) a Paleolithic occupational phase characterized by microlithic flakes dated by AMS 14C to 39,109+/-1,324 calibrated years BP(Hulu). The two phases are separated by a hiatus in hominin occupation corresponding to MIS 4 and an episode in early MIS 3. These chronometric data, taken together with the preliminary paleoenvironmental reconstruction of the Hovk 1 Cave and environment, suggest that these activity phases represent short-lived and seasonal use of the cave presumably by small groups of hunters during episodes of mild climate. Neither tool manufacture nor butchery appears to have taken place within the cave, and consequently, the archaeological record included, for the most part, finished tools and blanks. We address the chronology and techno-typological aspects of Hovk 1 lithics in relation to: (1) the Paleolithic records of Armenia, and (2) the broader interregional context of early Middle Paleolithic hominin occupation and the Middle-Upper Paleolithic transition in the Caucasus.

Areni-1 Cave, Armenia: A Chalcolithic–Early Bronze Age settlement and ritual site in the southern Caucasus

Abstract The beginning of the Bronze Age in the southern Caucasus has been thought to coincide with the appearance of the Kura Araxes (KA) culture around 3500 cal b.c. KA artifacts are known not only from the southern Caucasus but also from sites in Anatolia, Iran, and the Levant. Recent discoveries from Areni-1 Cave in the Vayots Dzor region of Armenia demonstrate that the origin of the distinctive KA artifact assemblage lies in the Late Chalcolithic of the late 5th to early 4th millennia b.c. The cave contains rich assemblages of desiccated botanical remains that allow the site to be precisely dated and that demonstrate that its inhabitants exploited a wide variety of domesticated and wild plants. It would appear that from 4000 cal b.c. onwards, people used Areni-1 Cave for habitation and for keeping goats, storing plant foods, and ritual purposes; unusual for this time period are ceramic vessels containing the skulls of children.

The chalcolithic of the Near East and south-eastern Europe: discoveries and new perspectives from the cave complex Areni-1, Armenia

The archaeological exploration of a cave in the southern Caucasus revealed evidence for early social complexity, ritual burial and wine-making in the early fourth millennium. The marvellous preservation of wood, leather and plants offers a valuable contrast to the poorer assemblages on contemporary tell sites. The authors make the case that the Areni-1 cave complex indicates connections between the urbanisation of early Mesopotamia and the Maikop culture of south Russia.

Quantifying the threat to archaeological sites from the erosion of cultivated soil

Ploughing is probably the greatest agent of attrition to archaeological sites world-wide. In every country, every year, a bit more is shaved off buried strata and a bit more of the past becomes unreadable. On the other hand, people must eat and crops must be planted. How can the fields be best managed to get the best of both worlds? Perhaps the most pressing need for resource managers is to know how quickly a particular field is eroding: negotiation and protection is then possible. Up to now that has been difficult to measure. The new procedure presented here, which draws on the unexpected benefits of nuclear weapons testing, shows how variation in the concentration of the radioisotope 137Cs can be used to monitor soil movements over the last 40 years. The measurements allow a sites ‘life expectancy’ to be calculated, and there are some promising dividends for tracking site formation processes.

Satsurblia: new insights of human response and survival across the Last Glacial Maximum in the southern Caucasus.

The region of western Georgia (Imereti) has been a major geographic corridor for human migrations during the Middle and Upper Palaeolithic (MP/UP). Knowledge of the MP and UP in this region, however, stems mostly from a small number of recent excavations at the sites of Ortvale Klde, Dzudzuana, Bondi, and Kotias Klde. These provide an absolute chronology for the Late MP and MP–UP transition, but only a partial perspective on the nature and timing of UP occupations, and limited data on how human groups in this region responded to the harsh climatic oscillations between 37,000–11,500 years before present. Here we report new UP archaeological sequences from fieldwork in Satsurblia cavein the same region. A series of living surfaces with combustion features, faunal remains, stone and bone tools, and ornaments provide new information about human occupations in this region (a) prior to the Last Glacial Maximum (LGM) at 25.5–24.4 ka cal. BP and (b) after the LGM at 17.9–16.2 ka cal. BP. The latter provides new evidence in the southern Caucasus for human occupation immediately after the LGM. The results of the campaigns in Satsurblia and Dzudzuana suggest that at present the most plausible scenario is one of a hiatus in the occupation of this region during the LGM (between 24.4–17.9 ka cal. BP). Analysis of the living surfaces at Satsurblia offers information about human activities such as the production and utilisation of lithics and bone tools, butchering, cooking and consumption of meat and wild cereals, the utilisation of fibers, and the use of certain woods. Microfaunal and palynological analyses point to fluctuations in the climate with consequent shifts in vegetation and the faunal spectrum not only before and after the LGM, but also during the two millennia following the end of the LGM.

Some techniques for improving the detection of archaeological features from satellite imagery

In common with all domains of remote sensing, residues indicative of past human activity can only be detected if they exhibit some form of identifiable contrast with their surroundings. Unlike many other domains these residues do not exhibit consistent spectral signatures. Archaeological spectral responses are commonly expressed as subtle deviations from their surrounding matrix. This is true for crop marks, soil marks and thermal anomalies. The challenge is to collect imagery when the contrast between archaeological residues and the background matrix is maximized and thus to find algorithms that will enhance these sometimes subtle distinctions so that they can be more readily detected. This paper will present work undertaken in the semi-arid environment of Homs, Syria. The project area includes two contrasting environmental zones with a differing repertoire of archaeological remains: a basalt zone (120 km2) and a marl zone (480 km2). Declassified Corona space photography and Ikonos satellite imagery (panchromatic and multispectral) were evaluated to determine their efficacy for detecting a range of different archaeological residues. No single image set was able to provide the best result for the two zones, as each required imagery collected under different environmental conditions.

Luminescence dating of qanat technology: prospects for further development

With few exceptions in which dating is implied by indirect association with adjacent settlements or incorporation of diagnostic artefacts in upcast sediment, individual qanats have proven very difficult to date. This absence of a chronological framework hampers both our understanding of technology transfer, as well as the study of local settlement and landscape evolution and the temporal correlation of land use with climatic and palaeoenvironmental data. However, surface shaft mounds potentially contain a sequence of upcast deposits collected periodically from the tunnel, starting with initial construction and persisting until the last maintenance episode, less any material lost by surface erosion. The sedimentary nature of the upcast lends itself to the application of luminescence dating to determine the burial age, in particular, using the techniques based on optically stimulated luminescence. We examine the results produced by two recent dating studies where luminescence techniques were applied to two qanat systems with the aim of building a chronostratigraphy for the deposits within their upcast mounds. These studies show that the extent to which a complete record of the deposition since initial construction survives may differ between qanat systems, and even shaft mounds within the same system. Providing there is a close coupling of luminescence and sedimentological analysis in the testing of qanat mounds, these formative studies suggest that there are good prospects for introducing a valuable tool in the study of various types of hydraulic feature where upcast has been preserved and guidance regarding further fieldwork is provided.

A Neolithic and Bronze Age Monument Complex and its Early Medieval Reuse: Excavations at Netherfield Farm, South Petherton, Somerset, 2006

An early Neolithic causewayed enclosure, a middle Neolithic long enclosure and an earlier Bronze Age open enclosure were among a group of prehistoric features discovered and examined by excavation at Netherfield Farm, South Petherton during archaeological mitigation work ahead of the construction of a natural gas pipeline between Ilchester and Barrington, Somerset, in 2006. Of particular interest were burnt deposits within the long enclosure ditches and a possible Bronze Age field system. Assemblages of pottery and flintwork contribute to the understanding of these features and a programme of radiocarbon dating has amplified the chronology of activity on the site. Evidence from a group of burnt and unburnt pits and a partial enclosure reveal the reuse of the site between the fifth and eighth centuries AD.