89 research outputs found

    The River Orontes in Syria and Turkey: downstream variation of fluvial archives in different crustal blocks

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    The geomorphology and Quaternary history of the River Orontes in western Syria and south-central Turkey have been studied using a combination of methods: field survey, differential GPS, satellite imagery, analysis of sediments to determine provenance, flow direction and fluvial environment, incorporation of evidence from fossils for both palaeoenvironments and biostratigraphy, uranium-series dating of calcrete cement, reconciliation of Palaeolithic archaeological contents, and uplift modelling based on terrace height distribution. The results underline the contrasting nature of different reaches of the Orontes, in part reflecting different crustal blocks, with different histories of landscape evolution. Upstream from Homs the Orontes has a system of calcreted terraces that form a staircase extending to ~200 m above the river. New U-series dating provides an age constraint within the lower part of the sequence that suggests underestimation of terrace ages in previous reviews. This upper valley is separated from another terraced reach, in the Middle Orontes, by a gorge cut through the Late Miocene–Early Pliocene Homs Basalt. The Middle Orontes terraces have long been recognized as a source of mammalian fossils and Palaeolithic artefacts, particularly from Latamneh, near the downstream end of the reach. This terraced section of the valley ends at a fault scarp, marking the edge of the subsiding Ghab Basin (a segment of the Dead Sea Fault Zone), which has been filled to a depth of ~ 1 km by dominantly lacustrine sediments of Pliocene–Quaternary age. Review of the fauna from Latamneh suggests that its age is 1.2–0.9 Ma, significantly older than previously supposed, and commensurate with less uplift in this reach than both the Upper and Lower Orontes. Two localities near the downstream end of the Ghab have provided molluscan and ostracod assemblages that record somewhat saline environments, perhaps caused by desiccation within the former lacustrine basin, although they include fluvial elements. The Ghab is separated from another subsiding and formerly lacustrine depocentre, the Amik Basin of Hatay Province, Turkey, by a second gorge, implicit of uplift, this time cut through Palaeogene limestone. The NE–SW oriented lowermost reach of the Orontes is again terraced, with a third and most dramatic gorge through the northern edge of the Ziyaret Dağı mountains, which are known to have experienced rapid uplift, probably again enhanced by movement on an active fault. Indeed, a conclusion of the research, in which these various reaches are compared, is that the crust in the Hatay region is significantly more dynamic than that further upstream, where uplift has been less rapid and less continuous

    Extra-Intestinal Manifestations of Familial Adenomatous Polyposis

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    Familial adenomatous polyposis (FAP) is an autosomal dominantly inherited disorder, which results from a germ line mutation in the APC (adenomatous polyposis coli) gene. FAP is characterized by the formation of hundreds to thousands of colorectal adenomatous polyps. Although the development of colorectal cancer stands out as the most prevalent complication, FAP is a multisystem disorder of growth. This means, it is comparable to other diseases such as the MEN syndromes, Von Hippel-Lindau disease and neurofibromatosis. However, the incidence of many of its clinical features is much lower. Therefore, a specialized multidisciplinary approach to optimize health care—common for other disorders—is not usually taken for FAP patients. Thus, clinicians that care for and counsel members of high-risk families should have familiarity with all the extra-intestinal manifestations of this syndrome. FAP-related complications, for which medical attention is essential, are not rare and their estimated lifetime risk presumably exceeds 30%. Affected individuals can develop thyroid and pancreatic cancer, hepatoblastomas, CNS tumors (especially medulloblastomas), and various benign tumors such as adrenal adenomas, osteomas, desmoid tumors and dental abnormalities. Due to improved longevity, as a result of better prevention of colorectal cancer, the risk of these clinical problems will further increase

    The shift from film to digital product: focus on CORONA imagery

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    This paper discusses the issue of the shift of USGS (United States Geological Survey) in providing a digital instead of a film product for the declassified imagery. The paper focuses on CORONA imagery. With the advent of computers and subsequently the increase of processing power, the sciences of photogrammetry and remote sensing and their respective approaches have evolved into a more interdisciplinary network within which GIS (Geographical Information Science) was a catalyst. The sensor technologies similarly evolved, and the paper discusses potential and trade-offs of this evolution. Applications showed that it is up to the user to select the most appropriate approach and media so as to meet the application's needs

    Analysis of Corona Imagery of the Ebla Region

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    The environment of Tell Mardikh/Ebla represents a key area to understand the urbanization process in the Ancient Near East, with specific reference to the third millennium b.c. However, after the early surveys carried out in this region between the 1960s and the 1970s, no systematic and up-to-date archaeological investigation has been attempted (see Mantellini, Micale, and Peyronel, in this volume). Thus, the first aim of the Ebla Chora Project (ECP) was to provide an assessment of the archaeological sites and landscape transformations in the area under investigation. One of the first and major tasks was therefore the location of landscape features due to past human activities, including tells, offsites, canals, linear hollows, and other features of potential archaeological interest. The recent and numerous projects conducted on a regional scale between Syria and Mesopotamia highlighted the usefulness of combining the different spatial datasets available in order to reconstruct the settlement dynamics and the landscape transformations of a given territory (Galiatsatos et al. 2009). This paper will discuss the application of such an approach within the area investigated by the ECP in order to identify potential sites to be further explored on the ground
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