نتایج جستجو برای: lower miocene

تعداد نتایج: 697574  

2004
Stephen F. Pekar Robert M. DeConto

Ice-volume estimates for the early Miocene (23–16 Ma ATS) were determined by applying dO to sea-level calibrations to high-resolution dO records from ODP Sites 1090 and 1218. These calibrated records indicate that ice-volume ranged between 50% and 125% of the present day East Antarctic Ice Sheet (EAIS) during most of the early Miocene (23–17 Ma). Maximum icevolume occurred at each of the early ...

Journal: :Paleoceanography and paleoclimatology 2022

Cenozoic climate changes have been linked to tectonic activity and variations in atmospheric CO2 concentrations. Here, we present Miocene Pliocene sensitivity experiments performed with the model COSMOS. The contain respect paleogeography, ocean gateway configuration, concentrations, as well a range of vertical mixing coefficients ocean. For mid-Miocene, show that impact on surface temperature ...

2013
Xiaoming Wang Qiang Li Guangpu Xie Joel E. Saylor Zhijie J. Tseng Gary T. Takeuchi Tao Deng Yang Wang Sukuan Hou Juan Liu Chunfu Zhang Ning Wang Feixiang Wu

In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: a b s t r a c t a r t i c l e i n f o The Pliocene (5.3–2.6 Ma) of Tibet witnessed the drying of the northern Tibetan Platea...

Journal: :Geomechanics and geophysics for geo-energy and geo-resources 2023

Abstract Lower Miocene rift sediments of the Nukhul Formation are one prominent hydrocarbon producers in Gulf Suez basin. In this study, we focused on oil producing sandstones Abu Rudeis-Sidri Field, located east central Suez. is characterized by low amplitude seismic reflectors and represents youngest identified reflector (Lower Miocene) study area. Petrophysical assessment was carried out usi...

2017
Michael D Gottfried Karen E Samonds Summer A Ostrowski Tsiory Harimalala Andrianavalona Tolotra Niaina Ramihangihajason

Recent exploration of Miocene-age deposits at Nosy Makamby, a small island ~50 km southwest of Mahajanga city in northwestern Madagascar, has led to the recovery of a large sample [82] of isolated barracuda teeth (Sphyraena sp.). in a tropical marine fauna that also includes diverse marine invertebrates, chondrichthyans, bony fishes, turtles, crocodylians, and sirenians. Characteristically for ...

2015
Raquel López-Antoñanzas Fabien Knoll Sibelle Maksoud Dany Azar

Ctenodactylinae (gundis) is a clade of rodents that experienced, in Miocene time, their greatest diversification and widest distribution. They expanded from the Far East, their area of origin, to Africa, which they entered from what would become the Arabian Peninsula. Questions concerning the origin of African Ctenodactylinae persist essentially because of a poor fossil record from the Miocene ...

Journal: :Zootaxa 2014
Qinqin Shi Wen He Shanqin Chen

A new species of the bovid Shaanxispira, from the upper Miocene deposits of the Linxia Basin, Gansu Province, China, is described here. Shaanxispira is endemic to Northern China and was previously known only from the Lantian area, Shaanxi Province, by two species, S. chowi and S. baheensis. The new species, S. linxiaensis nov. sp., is of early Bahean in age, slightly older than the species from...

2015
Wei Li Tiago M. Alves Shiguo Wu David Völker Fang Zhao Lijun Mi Achim Kopf

High-resolution multi-beam bathymetry, 3D and 2D seismic reflection profiles from the South China Sea are used to investigate the morphology, characteristics, origin and implications to petroleum systems of recurrent slope failure in the Qiongdongnan Basin, northern South China Sea. Seven Late Miocene-Holocene mass-transport deposits (MTDs) and numerous submarine canyons were identified on the ...

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