نتایج جستجو برای: middle cenozoic
تعداد نتایج: 157713 فیلتر نتایج به سال:
Abstract Brittle structures identified within the largest karstic cave of Sudetes (the Niedźwiedzia Cave) were studied to reconstruct paleostress driving post-Variscan tectonic activity in NE Bohemian Massif. Individual fault population datasets, including local strike and dip planes, striations, Riedel shear, enabled us discuss orientation principal stresses tensor. The (meso) fault-slip data ...
The marsupial and placental mammals originated at a time when the pattern of geographical barriers (oceans, shallow seas and mountains) was very different from that of today, and climates were warmer. The sequence of changes in these barriers, and their effects on the dispersal of the mammal families and on the faunas of mammals in the different continents, are reviewed. The mammal fauna of Sou...
Up to 50% of the increase in marine animal biodiversity through the Cenozoic at the genus level has been attributed to a sampling bias termed "the Pull of the Recent," the extension of stratigraphic ranges of fossil taxa by the relatively complete sampling of the Recent biota. However, 906 of 958 living genera and subgenera of bivalve mollusks having a fossil record occur in the Pliocene or Ple...
Quantitative subsidence analysis of 26 wells in the Lusitanian basin provides new constraints on the western Iberian Mesozoic passive margin development. Backstripped tectonic subsidence curves show a three-fold subdivision of vertical motions from Late Triassic onward. Continental rifting was initiated during the Late Triassic and Early Jurassic. From Middle Jurassic onward a distinct differen...
Abstract Signals of uplift and deformation across the Tibetan Plateau associated with Cenozoic India-Asia collision can be used to test debated mechanism(s) growth history plateau. The spatio-temporal evolution Eastern Kunlun Range in northern Tibet provides a window for understanding intracontinental tectonic region. exposes left-slip fault kinematically linked thrust belts. In this contributi...
Within the Central Andes of NW Argentina, spatiotemporal distribution and style deformation is strongly influenced by pre-Cenozoic heterogeneities, mostly related to Salta rift extension in Cretaceous. At enigmatic junction thin-skinned Subandean belt thick-skinned Santa Barbara System, Tilcara Range adjacent San Lucas block, located within Eastern Cordillera, show thermochronological field evi...
Causes of macroevolutionary trends in body size, such as Cope's Rule, the tendency of body size to increase over time, remain poorly understood. We used size measurements from Cenozoic populations of the ostracode genus Poseidonamicus, in conjunction with phylogeny and paleotemperature estimates, to show that climatic cooling leads to significant increases in body size, both overall and within ...
The Yadong-Gulu rift (YGR) South Tibet is a Cenozoic active rift, which endowed with abundant geothermal resources. Gulu field (GGF) located in the Northern section of where large number high-temperature hot springs develop, but its system mysterious. In this study, three-dimensional (3D) electrical structure GGF revealed by broad magnetotelluric (MT) and audio (AMT). MT reveals that middle upp...
Theories of late Cenozoic climate cooling assume that central Asian aridification and high dust accumulation rates in the Chinese Loess Plateau and the North Pacific Ocean are genetically related. On the basis of detailed sediment provenance analysis, we show that high dust accumulation rates in the Chinese Loess Plateau and the North Pacific Ocean during the late Miocene-Pliocene were mainly c...
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