Results 61 to 70 of about 464 (126)

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

Petroleum 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, Jiaxin SHI, Xiaofei FU, Yanfang LYU, Xianda SUN, Lei GONG, Yunfeng BAI   +6 more
doaj   +1 more source

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

Open 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

Would Adding the Anthropocene to the Geologic Time Scale Matter?

AGU 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, Martin J. Head, Colin N. Waters, Jan Zalasiewicz   +3 more
doaj   +1 more source

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

Geologica 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, Strasser André, Götz Annette E.   +2 more
doaj   +1 more source

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

Atmosphere
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

Astronomical cycle driving of coal-bearing rock system rotations in the Permian Shihezi Formation at Renlou Coal Mine

Solid Earth Sciences
Marine terrestrial transitional sedimentary rocks of Renlou Coal Mine are developed in coal bearing rock formations, which exhibits obvious cyclicity. These sedimentary cycles have a good correspondence with astronomical cycle signals.
Guodong Shi, Duoxi Yao, Xuekuan Shi
doaj   +1 more source

Exponential feedback effects in a parametric resonance climate model. [PDF]

Sci Rep, 2023
Caccamo MT, Magazù S.
europepmc   +1 more source

Millennial-scale variability of the Antarctic ice sheet during the early Miocene. [PDF]

Proc Natl Acad Sci U S A, 2023
Sullivan NB, Meyers SR, Levy RH, McKay RM, Golledge NR, Cortese G.   +5 more
europepmc   +1 more source

Astronomically Forced Cyclicity and Cyclostratigraphic Framework of the Middle Jurassic Bath–Bajocian Formation in the West Siberian Basin

Applied Sciences
We aim to elucidate the sedimentary cyclicity of the Middle Jurassic Bath–Bajocian Formation in the northern S Oilfield of the West Siberian Basin, address the lack of high-resolution Milankovitch cycle research in this region, and support hydrocarbon ...
Chengyu Song, Yefei Chen, Lun Zhao, Yunyang Liu, Yujie Gao   +4 more
doaj   +1 more source

Time-calibrated Milankovitch cycles for the late Permian. [PDF]

Nat Commun, 2013
Wu H, Zhang S, Hinnov LA, Jiang G, Feng Q, Li H, Yang T.   +6 more
europepmc   +1 more source