نتایج جستجو برای: Paleobasin
تعداد نتایج: 20 فیلتر نتایج به سال:
Excavation in the previously little-explored western portion of Olduvai Gorge indicates that hominid land use of the eastern paleobasin extended at least episodically to the west. Finds included a dentally complete Homo maxilla (OH 65) with lower face, Oldowan stone artifacts, and butchery-marked bones dated to be between 1.84 and 1.79 million years old. The hominid shows strong affinities to t...
Abstract The Ordovician–Silurian (~485–419 Ma) was a time of considerable evolutionary upheaval, encompassing both great diversification and one the first major mass extinctions. Ordovician coincided with global climatic cooling paleocontinental collision, ecological impacts which were mediated by region-specific processes including substrate changes, biotic invasions, tectonic movements. From ...
Abstract The carbonaceous macrofossils which belong to multicellular algae and were previously known from the younger (>570 Ma) Miaohe biota are found for first time in Lower Vendian (Middle Ediacaran, ~580 rocks of Ura Formation Patom Basin Siberia. include phytoleims unbranched ribbon-like thalli preserved on surfaces silty mudstones. Among fossils, species Liulingjitaenia alloplecta Jiuqu...
The Precambrian to Cambrian strata at the southwestern margin of Siberian Platform are ubiquitously characterized by a gradual transition from red-colored alluvial and deltaic deposits shallow-marine carbonates, reflecting transgressive infill accommodation space foreland basin. However, supposed synchronicity Early marine events calls for verification geochronological bio- chemostratigraphic d...
Characidium is a Neotropical fish genus. Its distribution ranges from eastern Panama to northern Argentina, and it is an important component of the Neotropical ichthyofauna present in the major rivers of South America. We here provide an approximation to the dispersal and historical distributions of Characidium. The biogeographic history of five species of the genus was analyzed through nuclear...
The article presents the results of studying mineralogical and geochemical features coals clay interlayers Shubarkol deposit. There were analyzed 71 samples layers 49 coal using instrumental neutron activation analysis (INAA), powder X-ray diffractometry, scanning electron microscopy. A comprehensive characteristics their enclosing was carried out. variety criteria made it possible to establish...
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