نتایج جستجو برای: upper paleozoic
تعداد نتایج: 206694 فیلتر نتایج به سال:
Both the gradual rise in atmospheric oxygen over the Proterozoic Eon as well as episodic fluctuations in oxygen over several million-year time spans during the Phanerozoic Era, have arguably exerted strong selective forces on cellular and organismic respiratory specialization and evolution. The rise in atmospheric oxygen, some 2 billion years after the origin of life, dramatically altered cell ...
The evolution of Earth's atmosphere is extreme importance to the lithosphere, hydrosphere and biosphere. This particularly true for role biosphere played in inceptual formation atmospheric oxygen, subsequently its potential higher life forms. Quantifying change oxygen with geologic time extremely challenging, redox sensitive isotope element models subject contradictory outcomes. Here, we presen...
The Bonaparte Gulf Basin Province (USGS #3910) of northern Australia contains three important hydrocarbon source-rock intervals. The oldest source-rock interval and associated reservoir rocks is the Milligans-Carboniferous, Permian petroleum system. This petroleum system is located at the southern end of Joseph Bonaparte Gulf and includes both onshore and offshore areas within a northwest to so...
نظر به اهمیت کنودونتها در تقسیمات چینهنگاری پالئوزوئیک و گسترش قابل توجه نهشتههای دونین پسین و کربونیفر پیشین در منطقه کرمان سه برش چینهشناسی (حور، هوتک و شمس آباد) در شمال استان کرمان انتخاب و بویژه بر اساس کنودونتها و بقایای ماهیان مورد مطالعه قرار گرفتند. مجموعه کنودونتهای بدست آمده از برش حور شامل 20 گونه متعلق به دو جنس polygnathus و icriodus بوده و سنی معادل فرازنین پسین را نشان می...
Estimating Perspectives of Oil and Gas in New Strata in the Southern and Surrounding Dayangshu Basin
On the basis of elaborating on regional geological background, this paper analyzes lithological and sedimentary characteristics explorative prospects new strata with oil gas in southern surrounding areas Dayangshu Basin. Based latest high-precision airborne gravity magnetic comprehensive survey data, combined data from explorations, physical surveys, drilling, use basin structure layering combi...
Collapsed reflections of lower Ordovician carbonates and upper Carboniferous-lower Permian coal-bearing strata occur below the middle Shihezi Formation in Hangjinqi area, northern Ordos Basin. This study takes advantage three-dimensional seismic data, logging core data well-testing to investigate genesis collapsed their implications for hydrocarbon potential. These collapse structures have a su...
Wavefield Migration Imaging of Moho Geometry and Upper Mantle Structure Beneath Southern New England
The crust and upper mantle beneath the New England Appalachians exhibit a large offset of Moho across boundary between Laurentia accreted terranes several dipping discontinuities, which reflect Paleozoic or younger tectonic movements. We apply scattered wavefield migration to SEISConn array deployed northern Connecticut obtain insights not previously available from receiver function studies. re...
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