نتایج جستجو برای: turonian boundary
تعداد نتایج: 159564 فیلتر نتایج به سال:
Cenomanian paralic deposits of Charentes (southwestern France) have yielded abundant vertebrate microremains, including rather diversified continental taxa (e.g., frogs, turtles, crocodilians, dinosaurs, pterosaurs, lizards, and mammals). In this preliminary report, the succession of faunal assemblages observed is briefly described in relation to palaeoenvironmental change resulting from the Ce...
abderaz formation is one of the upper cretaceous formations in the kopet-dagh sedimentary basin. a stratigraphic section from the mentioned formation is selected for detailed systematic description with regard to echinoids. numerous well preserved representatives of the families mircrasteridae wright, 1857 and echinocorythidae lambert, 1920 are described from the ghaleh-zoo stratigraphic sectio...
The U-isotope system is a well-established palaeo-redox proxy that potentially constrains the global extent of marine anoxia during average as well extreme redox events throughout Earth's history. A typical archive forms underneath reducing water column and acts an intense U sink organic-rich black shale. However, degree to which shale archives reflect signature not understood because fractiona...
Abstract We evaluate the Cretaceous stratigraphy and carbon sequestration potential of northern Baltimore Canyon Trough (NBCT) using >10,000 km multi-channel seismic profiles integrated with geophysical logs, biostratigraphy, lithology from 29 offshore wells. identify map six sequences resolved primarily at stage level. Accommodation was dominated by thermal non-thermal subsidence, thoug...
The Oceanic Anoxic Event 2, at the Cenomanian-Turonian boundary (∼93.9 Ma), was an episode of widespread burial organic matter in marine sediments, underlined by a positive carbon-isotope (δ 13 C) excursion observed worldwide. Within this O 2 -depleted conditions, short interval cooling, termed as Plenus Cold Event, has been recorded many sites and sections northern hemisphere (Tethyan domain, ...
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