نتایج جستجو برای: middle cenozoic
تعداد نتایج: 157713 فیلتر نتایج به سال:
Geological and geophysical transect of the Middle Tien Shan across the Naryn and Atbashi depressions
The article presents the results of integrated geological and geophysical research works dealt with detailed magnetotelluric (MT) sounding study morphology spatial position sedimentary cover basement structures along key transect Middle Tien Shan crossing Naryn Atbashi depressions. data on distribution deep electrical conductivity crust upper mantle were compared seismic profiling data. compila...
Ecology, evolution, and historical events all contribute to biogeographic patterns, but studies that integrate them are scarce. Here we focus on how biotic exchanges of mammals during the Late Cenozoic have contributed to current geographic body size patterns. We explore differences in the environmental correlates and phylogenetic patterning of body size between groups of mammals participating ...
Cenozoic climates have varied across a variety of time-scales, including slow, unidirectional change over tens of millions of years, as well as severe, geologically abrupt shifts in Earth's climatic state. Establishing the history of atmospheric carbon dioxide is critical in prioritizing the factors responsible for past climatic events, and integral in positioning future climate change within a...
Fossil and phylogenetic evidence indicates legume-rich modern tropical forests replaced Late Cretaceous palm-dominated tropical forests across four continents during the early Cenozoic (58-42 Ma). Tropical legume trees can transform ecosystems via their ability to fix dinitrogen (N2) and higher leaf N compared with non-legumes (35-65%), but it is unclear how their evolutionary rise contributed ...
Microbial corrosion textures in volcanic glass from Cenozoic seafloor basalts and the corresponding titanite replacement microtextures in metamorphosed Paleoarchean pillow lavas have been interpreted as evidence for a deep biosphere dating back in time through the earliest periods of preserved life on earth. This interpretation has been recently challenged for Paleoarchean titanite replacement ...
The Jurassic is one of the most important periods generating hydrocarbon source rocks and coals in Northwest China, Qaidam Basin an petroliferous coal-forming basin. However, a series explorations targeting have failed over past several years. These failures were mainly caused by missing targeted strata, suggesting that current understanding distribution still limited. Therefore, this study con...
Albanerpetontids are an extinct clade of superficially salamander-like lissamphibians that range from the Middle Jurassic (Bathonian)-Early Pleistocene and have a primarily Laurasian distribution. The best Cenozoic record for is in Europe, where two species type genus AlbanerpetonEstes & Hoffstetter, 1976 occur over 40 localities early Oligocene-Early age Austria, Czech Republic, France, German...
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