نتایج جستجو برای: chronostratigraphy
تعداد نتایج: 210 فیلتر نتایج به سال:
Integrated Ocean Drilling Program Site U1400 (CARI-07C, 14°32.58’N, 61°27.55’W, 2745 m below seafloor) is located west of Martinique. Site U1400 was dedicated to the study of debris avalanche emplacement and associated erosional processes. The evolution of the active Montagne Pelée volcano on Martinique is characterized by three major flank collapse events (~0.1 Ma, ~25 ka, and ~9,000 years ago...
This report summarizes the international divisions and ages in the Geologic Time Scale, published in 2012 (GTS2012). Since 2004, when GTS2004 was detailed, major developments have taken place that directly bear and have considerable impact on the intricate science of geologic time scaling. Precam brian now has a detailed proposal for chronostratigraphic subdivision instead of an outdated and ab...
The Baringo-Tugen Hills-Barsemoi 2013 drillcore (BTB13), acquired as part of the Hominin Sites and Paleolakes Drilling Project, recovered 228 m fluvio-lacustrine sedimentary rocks tuffs spanning a ~3.29–2.56 Ma interval highly fossiliferous hominin-bearing Chemeron Formation, Tugen Hills, Kenya. Here we present Bayesian stratigraphic age model for core employing chronostratigraphic control poin...
Abstract This chapter reviews the subsurface stratigraphy of Kuwait targeting geosciences educators. The lithostratigraphy and chronostratigraphy reviewed formations (association rocks whose components are paragenetically related to each other, both vertically laterally) followed formal stratigraphic nomenclature in Kuwait. exposed Miocene–Pleistocene epochs represented by Dibdibba, Lower Fars,...
The Pyrenean orogen extended eastward, across the present-day Gulf of Lion margin. late or post-orogenic dismantling this segment, contemporaneous with ongoing shortening in Spanish Pyrénées, is still debated. Understanding transition between two geodynamic events requires to document precise timing succession tectonic processes involved. We investigate superposition rifting structures over thr...
Abstract The detailed record of diagnostic acritarchs from the volcanosedimentary Vallehondo and Playon formations, bracketed between Cambrian Stage 4 strata bearing trilobite Serrodiscus Guzhangian (Miaolingian) beds with Sao aff. hirsuta, allows establishment a fine acritarch-based chronostratigraphy. Seven interval zones are defined by first successive appearances cosmopolitan index acritarc...
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