A Microfacies Toolkit for Revealing Linkages Between Cultural Discontinuities and Exceptional Geogenic Events: the Tell Da’de Case Study (NE Syria)

High-resolution multi-archive studies have been promoted to reveal abrupt discontinuities that would express rapid social reactions (days to decades) to sudden exceptional geogenic phenomena (climatic, volcanic, tectonic, geomorphic, or cosmic). We expose here how we have adopted this approach for examining the causal linkages between a series of cultural discontinuities encountered through the cultural deposits of Da’de (Syria) and cosmic airbursts. Cosmic events, known to be rare, erratic, and unpredictable, are traced by exceptional debris that formed from aerosols when violently compressed during entry through the earth atmosphere of hypervelocity cosmic collider. They consist of singular organo-mineral materials in the form of volatile-rich hydrocarbon fuel with resistant metal-rich carbonaceous composites and colorful polymers. The archaeological sequence comprises Da’de phases 0 to III that represent a nearly continuous accumulation for 1,000 years during the Pre-pottery Neolithic period (ca. 9,900–8,900 years bp) and two short-term occupation phases during the pre-Halaf (Da’de IV) and early Bronze Age periods (Da’de V). Study of the exceptional debris in virgin soils and occupation deposits at Da’de has allowed to distinguish an intact debris assemblage that pulverized at the ground following an airburst (type 1 natural singular signal) with the ones that have been processed by humans (type 2 anthropic singular signal). Type 1 singular organo-mineral materials were found intact at the contact of the virgin soil with the earliest Pre-pottery Neolithic A (PPNA) occupation layers (Da’de phase 0, area [SB]), at the top part of the virgin soil with the PPNA occupation layers (Da’de phase Ia, area [B]) and just under the lower slabs of the EB III/IV burials (Da’de phase V, area [SB]). This has allowed to establish a strict contemporaneity between cosmic airbursts and remarkable historical events: initial settlement at phase 0, establishment of the magnificent communal building at phase 1, EBIII/IV cemetery after a long period of abandonment. Evidence for the collection of the singular materials (type 2) and meticulous processing of the related hydrocarbon fuel in occupation floors, earthen construction, coloring materials, and objects have been traced from the initial settlement (phase 0) through the successive cultural periods. This correlation has revealed a long-lasting transmission of the value of memorial natural resources which were only available from time to time in the surroundings. The close timing between changes in the use of the singular organo-mineral materials (preparation techniques, types of by-products) and cultural phases has enabled us to identify social discontinuities which correlate to distinctive geogenic events and search of the related exceptional resources. Based on the long-term record from Da’de, cosmic airbursts are suggested to be considered as a new class of dual-discontinuous signal of historical dimension, which have led to sudden (days to months) geogenic shifts in the availability of singular fuel resources and, simultaneously, to rapid cultural responses in their exploitation and use, depending on reactivity of local landscapes to the induced changes at short time scales (decades).     

An intra-imperial conflict: the mapping of the border between Algeria and Tunisia, 1881-1914

This paper explores the issue of colonial borders through a case study of the intra-imperial boundary between Tunisia and Algeria, two territories under French rule between 1881 and the first decade of the twentieth century. The aim here is to understand what was at stake when it came to separating two territories holding different legal status but both administered by the French: Algeria which had officially become a French colony in 1830 and Tunisia which was given Protectorate status in 1880. The paper considers some of the many disputes over the border that took place both in the field and in colonial administrative offices. It also raises the question of the scope of colonial rule by exploring the way the border was never fully determined and was constantly redrawn by the inhabitants of the border regions themselves, who were presented first as tribes, and later, as either Algerian or Tunisian by the French civil and military administrations, and by the political authorities in Algiers, Tunis or Paris. As they all had their own interests in the matter, disputes were common but were also sometimes resolved in unexpected ways. Finally, the paper raises a further issue concerning the question of national identity in the context of the definition of national territories, which reveals the full ambiguity of the concept of identity in the colonial situation.     

The identification of cultivated pearl millet (Pennisetum) amongst plant impressions on pottery from Oued Chebbi (Dhar Oualata,Mauritania)

The majority of the neolithic pottery from Dhar Tichitt and Oualata bears abundant plant impressions on its surface. The present study involves direct examination of these impressions and comparsion with a control series in the laboratory. The criteria for differentiation between impressions made by wild and cultivatedPennisetum are clearly defined. In the pottery from Oued Chebbi (Dhar Oualata), the existence of many many impressions of pearl millet (Pennisetum), including both wild and cultivated strains, is confirmed. It is concluded that the area around Dhar Tichitt and Oualata belongs to a non-centre zone of origin (Harlan 1975) and that,ca 3000 bp, its inhabitants knew how to use cultivated strains in an area where wild strains were also found in some abundance.

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Résumé La céramique néolithique des dhars Tichitt et Oualata présente une abondance d'empreintes végétales en surface. La présente étude—basée sur la lecture directe des empreintes sur la céramique—s'appuye sur une série de référence fabriquée en laboratoire. Les critères de différenciation, dans le genrePennisetum, des empreintes de formes sauvages et de formes cultivées sont clairement précisées. L'existence, dans les céramiques de Oued Chebbi, de nombreuses empreintes de mil du genrePennisetum et, parmi celles-ci, de formes cultivées, est affirmée. Les différentes analyses d'empreintes permettent de penser que le secteure des dhars Tichitt et Oualata appartient à la zone d'origine non-centre définie par J. Harlan (1975) et qu'aux alentours de 3000 ans bp, ses habitants savaient exploiter des formes cultivées dans un cadre où les populations de forme sauvage avaient une certaine abondance.

     

Unraveling a Neanderthal palimpsest from a zooarcheological and taphonomic perspective

Practically all archeological assemblages are palimpsests. In spite of the high temporal resolution of Abric Romaní site, level O, dated to around 55 ka, is not an exception. This paper focuses on a zooarcheological and taphonomic analysis of this level, paying special attention to spatial and temporal approaches. The main goal is to unravel the palimpsest at the finest possible level by using different methods and techniques, such as archeostratigraphy, anatomical and taxonomical identification, taphonomic analysis, faunal refits and tooth wear analysis. The results obtained are compared to ethnoarcheological data so as to interpret site structure. In addition, activities carried out over different time spans (from individual episodes to long-term behaviors) are detected, and their spatial extent is explored, allowing to do inferences on settlement dynamics. This leads us to discuss the temporal and spatial scales over which Neanderthals carried out different activities within the site, and how they can be studied through the archeological record.     

Evaluating Crash Risk in Urban Areas Based on Vehicle and Pedestrian Modeling

This article presents a method for investigating the spatial distribution of vehicle and pedestrian traffic crashes relative to the volume of vehicle and pedestrian movement in urban areas. This method consists of two phases. First, vehicle and pedestrian traffic volumes on the street network are modeled using a space syntax configurational analysis of the network, land use data, and observed traffic data. Second, crash prediction models are fitted to the traffic crash data, using negative binomial regression models and based on traffic volume estimates and street segment lengths. The method was applied in two areas in Tel Aviv, Israel, which differ in their morphological and traffic characteristics. The case‐studies illustrated the method's capability in identifying hazardous locations on the network and examining relative crash risks. The analysis shows that an increase in vehicle or pedestrian traffic volume tends to be associated with a decrease in relative crash risk. Moreover, the spatial patterns of relative crash risks are associated with the design characteristics of urban space: areas characterized by dense street networks encourage more walking, and are generally safer for pedestrians, while those with longer street segments encourage more driving, are less safe for pedestrians, but safer for vehicles.