نتایج جستجو برای: campanian
تعداد نتایج: 532 فیلتر نتایج به سال:
A new crocodyliform from the Upper Cretaceous (Campanian-Maastrichtian) Presidente Prudente Formation of the Bauru Group is described based on two almost complete skulls and mandibles. The material comes from the "Tartaruguito" site, situated at an old railroad between the cities of Pirapozinho and Presidente Prudente, state of São Paulo, Brazil. The new species, Pepesuchus deiseae gen. et sp. ...
The Late Pleistocene Campanian Ignimbrite (CI) super-eruption (Southern Italy) is the largest known volcanic event in the Mediterranean area. The CI tephra is widely dispersed through western Eurasia and occurs in close stratigraphic association with significant palaeoclimatic and Palaeolithic cultural events. Here we present new high-precision 14C (34.29 ± 0.09 14C kyr BP, 1σ) and 40Ar/39Ar (3...
The tectonic opening of the Tasmanian Gateway and Drake Passage represented crucial geographic requirements for Cenozoic development Antarctic Circumpolar Current (ACC). Particularly complexity has hampered exact dating deepening phases, consequential onset throughflow ACC. One obstacles is putting key regional events, recorded in southern Patagonian sediments, absolute time. For that purpose, ...
in present study, diversity and relative abundance of calcareous nannofossils of the boundary between abtalkh and neyzar formations in dobaradar, kalat and chahchaheh sections were studied. taxonomical studies of calcareous nannofossils in the studied areas led to identification of 24 species in dobaradar, 27 species in kalat and 32 species in chahchaheh sections. based on identified nannofossi...
حوضه رسوبی کپهداغ در شمالخاوری ایران، در ناحیهای بین مرز ایران با ترکمنستان و افغانستان واقع شده و شامل توالیهای دریایی ژوراسیک تا نئوژن میباشد. سازند آبتلخ یکی از واحدهای سنگی کرتاسه بالایی حوضه رسوبی کپهداغ است که بیشترین ضخامت را در خاور این حوضه به خود اختصاص داده است. سازند آبتلخ از لحاظ نانوفسیلهای آهکی، دارای فراوانی و غنای بسیار زیاد و دارای حفظشدگی خوب تا متوسط بوده و حاوی ج...
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