Results 71 to 80 of about 513 (169)

Petrological characteristics and shale oil enrichment of lacustrine fine-grained sedimentary system: A case study of organic-rich shale in first member of Cretaceous Qingshankou Formation in Gulong Sag, Songliao Basin, NE China

open access: yesPetroleum Exploration and Development, 2018
Taking organic-rich shale in the first member of Cretaceous Qingshankou Formation in the Gulong Sag, northern Songliao Basin as an example, this study examined the lithofacies classification, petrological characteristics, pore size distribution and their
Bo LIU   +6 more
doaj   +1 more source

Interglacials, Milankovitch Cycles, Solar Activity, and Carbon Dioxide [PDF]

open access: yesJournal of Climatology, 2014
The existing understanding of interglacial periods is that they are initiated by Milankovitch cycles enhanced by rising atmospheric carbon dioxide concentrations. During interglacials, global temperature is also believed to be primarily controlled by carbon dioxide concentrations, modulated by internal processes such as the Pacific Decadal Oscillation
openaire   +1 more source

Late Quaternary record of 100 ka depositional cycles on the Larache shelf (NW Morocco)

open access: yesOpen Geosciences
This study examines the stratigraphic architecture of the Upper Pleistocene on the Larache margin, NW Moroccan Atlantic, focusing on the impact of glacio-eustatic cycles. Utilizing seismic analysis, we identified four major seismic sequences (UD, UC, UB,
Raki Amine, Jemily Linda, Mhammdi Nadia
doaj   +1 more source

Milankovitch cycles in an equatorial delta from the Miocene of Borneo

open access: yesEarth and Planetary Science Letters, 2017
The factors controlling sedimentary cyclicity in deltaic systems are a subject of intense debate, and more research, in different deltaic environments and time periods, is needed to better understand the possible mechanisms. Offshore and Pleistocene case studies are more common than proximal and more ancient, greenhouse-climate examples.
Nathan Marshall   +3 more
openaire   +5 more sources

Would Adding the Anthropocene to the Geologic Time Scale Matter?

open access: yesAGU Advances
Abrupt planetary change forced by the cumulative and overwhelming impacts of human activities in the mid‐twentieth century supports a new geologic epoch, named after Anthropos, the agent of this change.
Francine M. G. McCarthy   +3 more
doaj   +1 more source

Methane and Milankovitch cycles [PDF]

open access: yesNature, 1992
J. M. ADAMS, H. FAURE, N. PETIT-MAIRE
openaire   +1 more source

Integrated bio- and cyclostratigraphy of Middle Triassic (Anisian) ramp deposits, NW Bulgaria

open access: yesGeologica Carpathica, 2019
A cyclostratigraphic interpretation of peritidal to shallow-marine ramp deposits of the early Middle Triassic (Anisian) Opletnya Member exposed in outcrops along the Iskar River gorge, NW Bulgaria, is presented.
Ajdanlijsky George   +2 more
doaj   +1 more source

The Milankovitch Theory Revisited to Explain the Mid-Pleistocene and Early Quaternary Transitions

open access: yesAtmosphere
The theory of orbital forcing as formulated by Milankovitch involves the mediation by the advance (retreat) of ice sheets and the resulting variations in terrestrial albedo. This approach poses a major problem: that of the period of glacial cycles, which
Jean-Louis Pinault
doaj   +1 more source

The Dependence of Earth Milankovitch Cycles on Martian Mass

open access: yesPublications of the Astronomical Society of the Pacific
Abstract The Milankovitch cycles of Earth result from gravitational interactions with other bodies in the solar system. These interactions lead to slow changes in the orbit and angular momentum vector of Earth, and correspondingly influence Earth’s climate evolution. Several studies have shown that Mars may play a
Stephen R. Kane   +2 more
openaire   +2 more sources

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