نتایج جستجو برای: tithonian
تعداد نتایج: 143 فیلتر نتایج به سال:
The iconic primeval bird Archaeopteryx was so far mainly known from the Altmühltal Formation (early Tithonian) of Bavaria, southern Germany, with one specimen having been found in the overlying Mörnsheim Formation. A new specimen (the 12th skeletal specimen) from the earliest Tithonian Painten Formation of Schamhaupten (Bavaria) represents the so far oldest representative of the genus. The new ...
Herein are presented the results of detailed bio- (calcareous dinocysts, calpionellids, foraminifers, saccocomids) and chemostratigraphic (δ13C) studies combined with high-resolution microfacies, rock magnetic and gamma-ray spectrometry (GRS) investigations performed on upper Kimmeridgian–upper Valanginian carbonates of Giewont succession (Tatricum, Maly sections, Western Tatra Mountains, Polan...
A new interpretation of the Middle Jurassic-Early Cretaceous paleogeographic evolution NW sector Latium-Abruzzi carbonate platform facing Umbria-Marche Basin is proposed, based on Monte Giano area (central Apennines, Italy). During Late Triassic-early Bajocian time, was characterized by shallow water sedimentation. Inner and marginal deposits are overlain pelagic (Posidonia level), early p.p. i...
We characterised the organic matter content of marine deposits at Oxfordian–Kimmeridgian transition in Boulonnais (France). Organic rich platform environments are evidenced uppermost Cymodoce and lowermost Mutabilis Zone (early late Kimmeridgian), associated with enhanced planktonic palaeoproductivity and/or developing dysoxia/anoxia. Similar intervals early Kimmeridgian also Normandy Charentes...
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