Results 21 to 30 of about 2,024 (239)

Cyclostratigraphy of Lower Permian alkaline lacustrine deposits in the Mahu Sag, Junggar basin and its stratigraphic implication

open access: yesFrontiers in Earth Science, 2023
The Lower Permian Fengcheng Formation of the Mahu Sag is one of the most potentially petroliferous sequences in China, and its unique alkaline lacustrine deposits provide important information on the paleoclimate and paleoenvironment of the early Permian.
Yong Tang   +8 more
doaj   +2 more sources

High Geomagnetic Reversal Frequency During the Middle to Late Ediacaran (∼570 Ma) Constrained by Integrated Magneto‐ and Cyclostratigraphy

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
The Ediacaran–Cambrian (∼635–539 Ma) geomagnetic field is characterized by unusually high reversal rates and markedly weakened field strength. Estimates of these reversal frequencies can reveal key aspects of deep Earth dynamics and their potential ...
J. Afonso   +12 more
semanticscholar   +2 more sources

Combining chronostratigraphy and cyclostratigraphy in Quaternary lacustrine deposits of the Baza Formation (Orce, Granada Geopark, Southern Spain)

open access: yesQuaternary Research
International audienceAbstract A stratigraphic section made of Quaternary alluvial–lacustrine sediments belonging to the Baza Formation (South Spain) has been logged and studied for paleomagnetism, rock magnetic cyclostratigraphy, and electron spin ...
Anastasio, Dave   +12 more
core   +2 more sources

Seismic cyclostratigraphy: Hypothesis testing for orbital cyclicity using seismic reflection data

open access: yesEarth-Science Reviews
Several studies report observations of orbital cyclicity in seismic reflection data as distinct power spectral peaks that align with Milanković periodicities.
Rebesco, Michele   +4 more
core   +2 more sources

Pre-Cenozoic cyclostratigraphy and palaeoclimate responses to astronomical forcing

open access: yesNature Reviews Earth & Environment
Astronomical insolation forcing is well established as the underlying metronome of Quaternary ice ages and Cenozoic climate changes. Yet its effects on earlier eras (Mesozoic, Palaeozoic and pre-Cambrian) are less understood.
Percival, Lawrence M.E.; id_orcid   +3 more
core   +2 more sources

Platinum Group Element Traces of CAMP Volcanism Associated With Low‐Latitude Environmental and Biological Disruptions

open access: yesGeophysical Monograph Series, Page 263-304., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside   +3 more
wiley  

+2 more sources

Comparison of variations in sediment accumulation rates of the upper part of Zakeen Formation through cyclostratigraphic study in 2SK-1 and 2SKD-1 wells in Salman gas field [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2020
The Zakeen Formation is one of the possible gas reservoirs in the Zagros sedimentary basin. In this paper, the cyclostratigraphic study of the upper part of the Zakeen Formation was performed by using evolutionary spectral analysis methods.
Omid Falahatkhah   +2 more
doaj   +1 more source

Combined Magnetostratigraphy From Three Localities of the Rainstorm Member of the Johnnie Formation in California and Nevada, United States Calibrated by Cyclostratigraphy: A 13 R/Ma Reversal Frequency for the Ediacaran

open access: yesFrontiers in Earth Science, 2021
A combined magnetostratigraphy for the Rainstorm Member of the Ediacaran Johnnie Formation was constructed using the sediment accumulation rates determined by rock magnetic cyclostratigraphy for three localities of the Rainstorm Member to provide a high ...
Kenneth P. Kodama
doaj   +1 more source

Cyclostratigraphy and paleoclimate analysis of the Lingshui Formation in Changchang Sag, Qiongdongnan Basin, China

open access: yesEnergy Geoscience, 2023
The Qiongdongnan Basin, located in the sea between Hainan Island and the Xisha Islands, is a faulted Cenozoic basin on the northern continental margin of the South China Sea.
Haizhang Yang   +5 more
doaj   +2 more sources

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