Geoarchaeology-An International Journal最新文献

The Abrigo de la Quebrada is a Middle Palaeolithic rockshelter located in the Rambla de Ahíllas in the Iberian Range (Valencia, Spain). Archaeological work began in 2007 and was completed in 2015, reaching the rockshelter substratum and uncovering a record that spans from MIS 5 to MIS 4/3. The data from the geoarchaeological and micromorphological study of the site allow us to deduce that it was formed by alluvial contributions from the ephemeral stream, in different subenvironments varying from channel/bar to floodplain facies. These alternate with debris from different displacement processes depending on the unit, such as solifluction–gelifluction, mass displacement, and diffuse runoff. In addition, collapse episodes of the overhanging rockshelter roof influenced the pedological evolution of the record, with implications for the archaeological levels, especially in Unit G (Level IV). From a paleoenvironmental point of view, a more contrasted variability is reflected in the upper units of the site (MIS 4/3), especially in Unit G (Level IV), which, based on data, suggests temperate conditions, and in Unit H (Levels III and II) indicate cold conditions. In contrast, the lower units (MIS 5) are generally temperate, with the exception of Unit C (Level VIIIa), which reflects a colder phase.

The indigenous populations of La Palma (Canary Islands), who arrived on the island from Northwest Africa ca. 2000 years B.P., were predominantly pastoralists. Yet, many aspects of their subsistence economy such as the procurement, management, and use of wild plant resources remain largely unknown. To explore this, we studied the 600–1100-year-old archaeological site of Belmaco Cave, which comprises a stratified sedimentary deposit representative of a fumier. Here, we present a high-resolution, multiproxy geoarchaeological study combining soil micromorphology, lipid biomarker analysis, X-ray diffraction, μ-X-ray diffraction, μ-X-ray fluorescence, Fourier transform infrared spectroscopy, and μ-Fourier transform infrared spectroscopy, to characterize formation processes and explore plant sources. Recurrent goat/sheep habitation and maintenance activities are represented by interstratified layers of unburned dung, charcoal-rich sediment, and dung ash. Lipid biomarker data show a herd diet mainly composed of herbaceous plants, which is key to understanding the mobility of indigenous shepherds. Our results also revealed an unusual suite of authigenic minerals including hazenite, aragonite, and sylvite, possibly formed through diagenetic processes involving interaction between ash, dung, urine, volcanogenic components, and bacterial activity, coupled with arid and alkaline conditions. Our study shows the potential of a multiproxy approach to a fumier deposit in a volcanogenic sedimentary context.

A rhyolite boulder collected by R. S. Newall in 1924 from an excavation at Stonehenge has been pivotal to arguments concerning glacial versus human transport of the bluestones to Stonehenge. Initial studies suggested that the boulder came from north Wales, and hence was a probable glacial erratic. New petrographic and geochemical analyses however support it being from Craig Rhos-y-Felin in west Wales, the source of much debitage recovered from Stonehenge. Examination of the form and surface features of the boulder provides no evidence for it being erratic. Instead, it is considered to be one more piece of debitage probably derived from a broken-up monolith.

This article presents an interdisciplinary study of two Late/Final Neolithic gallery graves (Kernic and Lerret) located on the orthwestern coast of Brittany (Western France). These monuments show striking similarities in terms of architectural style and geographical position. This paper aims to provide a better understanding of the construction strategy of these monuments by (i) determining the origin of the megalithic blocks using comparative petro-structural analyses of blocks and surrounding rocks, (ii) reconstructing the coastal environment from sediment core analyses and (iii) defining the significance of these monuments in the territories from an intervisibility analysis. The study reveals marked differences between the two monuments studied. The Lerret gallery grave was erected close to a unique source of stone material on the margins of a marshland zone. In contrast, the Kernic monument, erected on the edge of an estuary, seems to have been built using a deliberate diversification of stone extraction sites. An intervisibility analysis shows a dense network of visual interconnections between a number of megalithic tombs present in the study area, where the two monuments occupy very distinct sites. The social implications of stone selection and the geographical location of Late/Final Neolithic funerary monuments are also discussed in an enlarged regional context.

Red chert attributed to the Munsungun Lake Formation, Maine, USA is common in late Pleistocene fluted-point-period archaeological sites located throughout the New England states and Quebec, appearing more frequently than any other material type in the region. Despite the assumed association between red Munsungun chert and fluted-point-period sites, until recently, it was not possible to link red chert artifacts from these sites to a specific source area within the Munsungun Lake Formation because outcrops of this material associated with direct evidence of past use were not documented. Here, we report the first results of a neutron activation analysis (NAA) study of red Munsungun chert from two quarry areas within the Munsungun Lake Formation. These results suggest that NAA can distinguish between chert source areas within the Munsungun Lake Formation and lookalike materials from the wider region. Additional analyses are required to include more comparative samples and evaluate the efficacy of less destructive geochemical techniques in characterizing cherts from the region. Despite the need for additional research, these results suggest that NAA will be useful for re-evaluating past identifications of chert from the Munsungun Lake Formation, providing an important foundation for additional geochemical research in the region.

The Hula Valley has two key Acheulian sites: Gesher Benot Ya'aqov (GBY), a large flake Acheulian site with hundreds of basalt bifaces and a significant number of flint handaxes, and Ma'ayan Barukh (MB), where more than 3500 flint handaxes were collected. Over the last one million years, the valley was filled by alluvium and basalt flows, devoid of flint sources suitable for handaxe production. We conducted archaeological and geological surveys combined with an inductively coupled plasma mass spectrometry geochemical study to determine the source(s) of flint, comparing elemental compositions of handaxes from GBY and MB with those of different flint sources using a novel statistical method. The results demonstrate that Hula Valley Acheulian flint handaxes were derived from Eocene flint. For GBY, the nearest matching source for its small number of excavated handaxes is a secondary deposit of the Dishon streambed found ~8 km northwest of the site. A more likely source for both GBY and the thousands of MB handaxes is the Dishon flint extraction and reduction complex located 20 km to the west, a possibility also supported by the near absence of production waste flakes at the sites themselves. These findings support direct procurement strategy as early as the Lower Paleolithic.

The investigation of submerged archaeological sites faces numerous logistical challenges in the recovery of stratigraphic sequences and, as a result, is often restricted to surface deposits limiting the application of geoarchaeology. This paper outlines a new integrated field and microanalytical methodological protocol to investigate deep stratigraphic sequences (up to 2 m) within the submerged Pre-Pottery Neolithic (PPN) site of Atlit-Yam (9267–7970 cal. B.P. [calibrated years before the present]). A new coring method for the extraction of deep underwater stratigraphy was developed to extract three cores: two between architectural remains within the site and one outside the site. The cores were analysed using Fourier-transform infrared spectroscopy, phytolith and pollen analysis and archaeological micromorphology to detect anthropogenic signals and undertake paleoenvironmental reconstruction. Our results indicate anthropogenic evidence at 95 cm depth based on the presence of heat-altered sediments, high phytolith concentrations and micromorphological observations of archaeological remains. Radiocarbon analysis indicates the oldest anthropogenic layers date to the Mid Pre-Pottery Neolithic B (PPNB) and Late PPNB (9859–9323 cal. B.P.), bearing implications for reassessing the emergence of the first coastal Neolithic villages in the Mediterranean. Our integrated field and multiproxy micro-geoarchaeological protocol offers a new approach to detecting and studying submerged archaeological sites worldwide.

The term fabric has a variety of meanings, particularly in geology and archaeology. In the former case, it can encapsulate the three-dimensional arrangement of particles and voids, including organizational aspects such as bedding. In archaeology, it can also refer to positions of sites on a landscape or the structure and geometry of, say, buildings within a site; it can also refer to the infillings within individual structures. In this study, we illustrate the concept of fabric with the site of Torre d'en Galmés on the Spanish Island of Menorca to show that in fact fabrics exist at a variety of scales from the geological fabric of the Island, down to the fabrics of the sedimentary infills between and within buildings and spaces. We show that by examining the fabrics at different scales on Menorca, we can gain a more complete and integrative understanding of the geoarchaeology at this location, rather than simply investigating individual aspects as is more typical in geoarchaeology and archaeology.

Across a 1000-km stretch of the River Nile, from the 1st Cataract in southern Egypt to the 4th Cataract in Sudan, many hundreds of drystone walls are located within active channels, on seasonally inundated floodplains or in now-dry Holocene palaeochannel belts. These walls (or river groynes) functioned as flood and flow control structures and are of a type now commonly in use worldwide. In the Nile Valley, the structures have been subject only to localised investigations, and none have been radiometrically dated. Some were built within living memory to trap nutrient-rich Nile silts for agriculture, a practice already recorded in the early 19th century C.E. However, others situated within ancient palaeochannel belts indicate construction over much longer time frames. In this paper, we map the distribution of these river groynes using remote sensing and drone survey. We then establish their probable functions and a provisional chronology using ethnoarchaeological investigation and the ground survey, excavation and radiometric dating of the structures in northern Sudan, focusing on the Holocene riverine landscape surrounding the pharaonic settlement of Amara West (c. 1300–1000 B.C.E.). Finally, we consider the historical and economic implications of this form of hydraulic engineering in the Nile Valley over the past three millennia.