نتایج جستجو برای: lower paleocene
تعداد نتایج: 692817 فیلتر نتایج به سال:
In order to decipher the paleo-depositional environments, during Late Jurassic Early Eocene syn-rift stage, at margins of Ionian basin, two different areas with exposed long sequences have been selected, Kastos Island (external margin) and Araxos peninsula (internal margin), were examined by means microfacies analysis biostratigraphy. On Island, based on lithological sedimentological features, ...
The configuration and timing of the Arabia-Eurasia continental collision, part broader Alpine-Himalayan collisional system, remains controversial. We conducted sandstone petrology, detrital zircon U-Pb-Hf isotopic trace element analysis, Cr-spinel electron microprobe geochemical analysis samples from Paleocene to Miocene peripheral foreland strata in interior Fars, southern Iran. These data wer...
Previous workers identified a magnetically anomalous clay layer deposited on the northern United States Atlantic Coastal Plain during the Paleocene-Eocene Thermal Maximum (PETM). The finding inspired the highly controversial hypothesis that a cometary impact triggered the PETM. Here we present ferromagnetic resonance (FMR), isothermal and anhysteretic remanent magnetization, first order reversa...
Deltatheroidans are primitive metatherian mammals (relatives of marsupials), previously thought to have become extinct during the Cretaceous mass extinction. Here, we report a tiny new deltatheroidan mammal (Gurbanodelta kara gen. et sp. nov.) discovered at the South Gobi locality in China (Xinjiang Province) that is the first Cenozoic record of this clade and renders Deltatheroida a Lazarus ta...
Currently, the lower Paleogene Wenchang formation in Lufeng Depression is primary focus of reservoir development. The structural fractures that have formed inside it not only serve as principal path for oil migration, but also storage space. As a result, distribution features are crucial future petroleum exploration and development Depression. At same time, with quantity conventional reservoirs...
Abstract The Zagros orogen, formed by the collision of Arabian and Eurasian continental margins, represents one largest richest oil gas provinces in world. fold-thrust belt records convergence along Neotethys suture zone. By coupling field observations, sandstone modal analysis, U-Pb zircon dating, Hf isotopic data from Upper Cretaceous to Pliocene sedimentary succession Neyriz region, this pap...
Multimillion-year proxy records across the Paleocene and Eocene show prominent variations on orbital time scales. The cycles, which have been identified at various sites across the globe, preferentially concentrate spectral power at eccentricity and precessional frequencies. It is evident that these cycles are an expression of changes in global climate and carbon cycling paced by astronomical f...
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