Processes of Paleoindian site and desert pavement formation in the Atacama Desert, Chile

2020 ◽  
Vol 98 ◽  
pp. 58-80
Author(s):  
Paula C. Ugalde ◽  
Jay Quade ◽  
Calogero M. Santoro ◽  
Vance T. Holliday

AbstractA distinct feature of many of the earliest archaeological sites (13,000-11,200 cal yr BP) at the core of the Atacama Desert is that they lie at or just below the surface, often encased in desert pavements. In this study, we compare these sites and undisturbed desert pavements to understand archaeological site formation and pavement development and recovery. Our results indicate these pavements and their soils are poorly developed regardless of their age. We propose that this is because of sustained lack of rain and extreme physical breakdown of clasts by salt expansion. Thus, the core of the Atacama provides an example of the lower limits of rainfall (<50 mm/yr) needed to form desert pavements. At site Quebrada Maní 12 (QM12), humans destroyed the pavement. After abandonment, human-made depressions were filled with eolian sands, incorporating artifacts in shallow deposits. Small and medium-sized artifacts preferentially migrated upwards, perhaps due to earthquakes and the action of salts. These artifacts, which now form palimpsests at the surface, helped – along with older clasts - to restore surface clast cover. Larger archaeological features remained undisturbed on top of a deeper Byzm horizon. The vesicular A horizons (Av horizons) have not regenerated on the archaeological sites due to extreme scarcity of rainfall during the Holocene.

Author(s):  
Manjil Hazarika

This chapter elaborates the data and results of the explorations conducted in the Garbhanga Reserve Forest. The area has been intensively surveyed for the location of potential archaeological sites and the collection of ethnographic data in order to draw direct historical analogies. An ‘area-approach’ study has been conducted in order to formulate a general model for archaeological site structure, locations, geomorphic situations, and site formation processes that can be used for archaeological study in the hilly landscape of Northeast India. Present-day agricultural implements have been analysed and compared with Neolithic implements in order to reconstruct ancient farming culture by way of undertaking systematic study of modern peasant ways of life in the study area. The ideological significance of stone artefacts as ‘thunderstone’ in Northeast India and among the Karbis has also been discussed.


Author(s):  
Vance T. Holliday

Pedogenic processes that produce or alter the soils associated with a landscape (buried or unburied) also modify the archaeological sites and other traces of human activity associated with that landscape and buried landscapes. The wide range of processes that form soils can profoundly affect the archaeological record. Pedogenesis, therefore, is an important component of the processes of archaeological site formation. Archaeological “site-formation processes” are those processes that modify artifacts and archaeological sites from the moment they were formed until they are uncovered by archaeologists (Stein, 2001b, pp. 37–38). Understanding formation processes is crucial in archaeology because archaeologists use the patterns of artifacts in the ground to infer behaviors. Formation processes identify patterns that are created by ancient behaviors and separate those patterns from the ones created by later cultural and natural processes (Stein, 2001b, p. 37). In his influential volume Formation Processes of the Archaeological Record, Schiffer (1987, p. 7) notes that archaeologists try to infer past behavior based on the archaeological record, but the record “must be handled with great care by the investigator seeking to infer past behaviors, for the evidence that survives has been changed in many ways by a variety of processes.” These processes introduce variability and ambiguity into the archaeological record. Schiffer (1987, p. 7) further distinguishes between cultural processes, in which the agency of transformation is human behavior, and noncultural processes, which stem from processes of the natural environment. Natural formation processes are many and varied and include plants, animals, wind, water, ice, and gravity, among others. Soil formation is also identified as an important process of site formation. Schiffer (1987) provides a comprehensive discussion of natural site-formation processes, which are summarized by Stein (2001b). Nash and Petraglia (1987) and Goldberg et al. (1993) also provide a number of case histories of natural formation processes identified at archaeological sites. Because soil formation represents the alteration of rock and sediment (chapter 1), pedogenic processes are important natural processes in the formation of archaeological sites. Other weathering processes that are significant in site formation can be grouped as “diagenetic alterations.”


Author(s):  
Vance T. Holliday

Soils and archaeological sites are intimately related to the landscape. Investigating soils across past and present landscapes provides a means of reconstructing and understanding the regional environmental and geomorphic context of archaeological site settings and specific site locations, regional site formation processes, and aspects of the resources available to people in a region. Archaeological sites tend to occupy small segments of the landscape, but human activity may affect a much larger area, and in any case, people wander far and wide from sites, interacting with the environment—including the landscape. Thus, no matter whether a site is just a lithic scatter or bone bed or if it is a tell, understanding the regional landscape is an important part of understanding a site and human behavior, and soils are an important means of understanding a landscape. Soils are also important in reconstructing the evolution of landscapes and, consequently, the evolution of archaeological sites. That is, landscape evolution is an important external component of site-formation processes. Landscapes form the physical framework or underpinning for people and their activities and their resulting sites. As landscapes evolve, so do human activities and so do sites. Soils are key to recognizing and interpreting the evolutionary processes that shape the landscape and associated archaeological sites. Furthermore, the concept of landscape evolution also 1) is a logical continuation of the discussion of soil stratigraphy (chapters 5, 6) because it places soil stratigraphy in three or even four dimensions; 2) is a complement to the discussion of soils as environmental indicators (chapter 8), because landscape evolution can be linked to environmental change and because the evolution of the landscape itself, regardless of changes in other factors, represents a change in the environment from a human perspective; and 3) provides yet another means for predicting site locations. The discussion in this section, therefore, represents an integration of some of the principals outlined previously. Some of the studies presented in other chapters, such as the work on the Loess Plateau of China (chapters 6 and 8), and at Harappa and along the Ravi River (chapter 4), are good examples of landscape reconstructions for very large regions and are not repeated here.


1987 ◽  
Vol 52 (4) ◽  
pp. 856-857 ◽  
Author(s):  
Milla Y. Ohel

Pedoturbation by moles at archaeological sites in the Upper Galilee of Israel is offered to supplement data published by Bocek (1986).


Quaternary ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 33
Author(s):  
Loïc Lebreton ◽  
Eugène Morin ◽  
Brad Gravina ◽  
Alexandre Michel ◽  
François Bachellerie ◽  
...  

As micromammals are highly sensitive to changes in their habitat, variations in species representation are often used to reconstruct local environmental conditions. However, taphonomic aspects of micromammals are often overlooked, despite the fact that they can provide important information for our understanding of archaeological sites. La Roche-à-Pierrot, Saint-Césaire, is a major archaeological site for our understanding of the Middle-to-Upper Palaeolithic transition in Western Europe. Clearly documenting site formation processes, the post-depositional reworking of deposits and the sequence of human occupations is fundamental for providing a secure archaeostratigraphic context of the site. The exceptionally large accumulation of micromammals from recently excavated stratigraphic units at the site makes it possible to track variations in the density of micromammals across the stratigraphic sequence. The taphonomic analysis of micromammals demonstrates these variations are not related to a change in the main accumulation agent or post-depositional phenomena. A negative correlation between small mammal remains and archaeological material suggests that peaks in micromammal densities can potentially be correlated with periods when the site was abandoned or when human occupation was less intense, and therefore provide new data for interpreting the Saint-Césaire stratigraphic sequence.


Antiquity ◽  
2016 ◽  
Vol 90 (354) ◽  
Author(s):  
F. Contreras ◽  
N. Carcacer ◽  
J. Thomas ◽  
D. Koljic ◽  
M. Murray ◽  
...  

The archaeological site of Al-Ashoosh is a third-millennium BC settlement located in the Rub al-Khali Desert (or Empty Quarter), 70km south of Dubai in the United Arab Emirates (UAE) (Figure 1). This site provides an excellent example of the type of occupation of the inland deserts of the Oman peninsula during the period following the Holocene Climatic Optimum. Between November 2015 and May 2016, the Dubai Municipality and the Sanisera Archaeology Institute conducted excavations at the site of Al-Ashoosh. This site was discovered during two seasons of survey in 2002–2003. This survey work, undertaken by the Dubai Municipality and the Department of Antiquities of Jordan, identified 33 archaeological sites ranging in date from prehistory to the late Islamic period. In 2006–2007, more-detailed archaeological investigations of the area of Al-Ashoosh were conducted, including survey, excavation and geological sampling (Casana et al.2009; Herrmann 2012; Contreras & Carcacer 2016).


2019 ◽  
Author(s):  
Sawyer Reid stippa ◽  
George Petropoulos ◽  
Leonidas Toulios ◽  
Prashant K. Srivastava

Archaeological site mapping is important for both understanding the history as well as protecting them from excavation during the developmental activities. As archaeological sites generally spread over a large area, use of high spatial resolution remote sensing imagery is becoming increasingly applicable in the world. The main objective of this study was to map the land cover of the Itanos area of Crete and of its changes, with specific focus on the detection of the landscape’s archaeological features. Six satellite images were acquired from the Pleiades and WorldView-2 satellites over a period of 3 years. In addition, digital photography of two known archaeological sites was used for validation. An Object Based Image Analysis (OBIA) classification was subsequently developed using the five acquired satellite images. Two rule-sets were created, one using the standard four bands which both satellites have and another for the two WorldView-2 images their four extra bands included. Validation of the thematic maps produced from the classification scenarios confirmed a difference in accuracy amongst the five images. Comparing the results of a 4-band rule-set versus the 8-band showed a slight increase in classification accuracy using extra bands. The resultant classifications showed a good level of accuracy exceeding 70%. Yet, separating the archaeological sites from the open spaces with little or no vegetation proved challenging. This was mainly due to the high spectral similarity between rocks and the archaeological ruins. The satellite data spatial resolution allowed for the accuracy in defining larger archaeological sites, but still was a difficulty in distinguishing smaller areas of interest. The digital photography data provided a very good 3D representation for the archaeological sites, assisting as well in validating the satellite-derived classification maps. All in all, our study provided further evidence that use of high resolution imagery may allow for archaeological sites to be located, but only where they are of a suitable size archaeological features.


2017 ◽  
Author(s):  
Mallory N. Gerzan ◽  
◽  
Gary E. Stinchcomb ◽  
Joseph V. Ferraro ◽  
Steven L. Forman ◽  
...  

2021 ◽  
Vol 13 (9) ◽  
Author(s):  
Sandra Rebolledo ◽  
Philippe Béarez ◽  
Débora Zurro

Abstract The Atacama Desert coast (18–30° S) presents one of the earliest chronologies in the South America region, whose first occupations date from ~ 13,000 cal BP. Since that time, coastal and marine resources have been a common component at sites along the littoral zone. Fish species have been particularly important, as have the fishing technologies developed and used by the coastal communities. However, even though several archaeological sites have been studied, there is no systematic macro-regional analysis of early fisheries along the Atacama Desert coast. Furthermore, differences in theoretical and methodological approaches, as well as research objectives, hinder comparisons between ichthyoarchaeological assemblages. Here, we present a comparative analysis of the Atacama Desert fish data obtained from publications and gray literature from ten archaeological sites dating from the Terminal Pleistocene to the Early Holocene. Through the standardization of contextual and ichthyoarchaeological information, we compared data using NISP, MNI, and weight to calculate fish density, richness, and ubiquity, in order to identify similarities and differences between assemblages. This exploratory approach aims to contribute to studies of fish consumption in the area, as well as proposing new methodological questions and solutions regarding data heterogeneity in archaeozoology.


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