Two spinel populations from the Cretaceous-Paleogene (K/T) boundary clay layer in the Gams stratigraphic sequence, Eastern Alps
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چکیده
منابع مشابه
Deep Sea Environments Across the Cretaceous/Paleogene boundary in the eastern South Atlantic Ocean
Sediments recovered at ODP Site 1262 on Walvis Ridge (eastern South Atlantic Ocean, paleodepth ∼2500–3000 m) offer an opportunity to look into the nature and cause(s) of the benthic foraminiferal turnover across the Cretaceous/Paleogene (K/Pg) boundary at abyssal depths at a location relatively remote from the location of the asteroid impact on the Yucatan peninsula. Late Maastrichtian assembla...
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Mass extinctions manifest in Earth's geologic record were turning points in biotic evolution. We present (40)Ar/(39)Ar data that establish synchrony between the Cretaceous-Paleogene boundary and associated mass extinctions with the Chicxulub bolide impact to within 32,000 years. Perturbation of the atmospheric carbon cycle at the boundary likely lasted less than 5000 years, exhibiting a recover...
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متن کاملAnalysis of the cretaceous-tertiary boundary clay: methodology questioned.
ic outflow (38), also thought to regulate immune function (39j. Although knowledge of the precise involvement of the immune system in surveillance against tumors is limited, there is evidence to suggest that NK cells play a pivotal role (6). In this regard, we found that the same footshock stress regimen which causes a naltrexone-sensitive suppression of NK activity also enhances development of...
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ژورنال
عنوان ژورنال: Russian Journal of Earth Sciences
سال: 2007
ISSN: 1681-1208
DOI: 10.2205/2007es000297