Results 11 to 20 of about 513 (169)

Proterozoic Milankovitch cycles and the history of the solar system [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2018
SignificancePeriodic variations in Earth’s orbit and rotation axis occur over tens of thousands of years, producing rhythmic climate changes known as Milankovitch cycles. The geologic record of these climate cycles is a powerful tool for reconstructing geologic time, for understanding ancient climate change, and for evaluating the history of our solar ...
Stephen R Meyers, Alberto Malinverno, Meyers Stephen R   +2 more
exaly   +5 more sources

Enhancing in search of Milankovitch cycles from stratigraphic record using convex optimization algorithm [PDF]

Scientific Reports
Accurately identifying Milankovitch cycles has been a significant challenge in cyclostratigraphic studies, as it is essential for improving geochronology.
Syaiful Alam, Mohamad Sapari Dwi Hadian, Ahmad Helman Hamdani, Noorzamzarina Sulaiman   +3 more
doaj   +3 more sources

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

Nat Commun, 2013
AbstractAn important innovation in the geosciences is the astronomical time scale. The astronomical time scale is based on the Milankovitch-forced stratigraphy that has been calibrated to astronomical models of paleoclimate forcing; it is defined for much of Cenozoic–Mesozoic.
Wu H, Zhang S, Hinnov LA, Jiang G, Feng Q, Li H, Yang T.   +6 more
europepmc   +4 more sources

Characteristics of Milankovitch cycles recorded in Eocene strata in the eastern depression of North Yellow Sea Basin, North China

China Geology, 2021
As cyclical orbital movements of Earth, Milankovitch cycles can be recorded in sedimentary strata. The time they reflect can be used to accurately divide and compare strata.
Shu-yu Wu, Jun Liu, Jian-wen Chen, Hao-ran Wu   +3 more
doaj   +3 more sources

Utilizing Maximum Entropy Spectral Analysis (MESA) to identify Milankovitch cycles in Lower Member of Miocene Zhujiang Formation in north slope of Baiyun Sag, Pearl River Mouth Basin, South China Sea

Open Geosciences, 2019
Logs in the petroleum boreholes indirectly records the sedimentary cycles in the deep burial formation. In order to extract and understand the periodicity and cyclicity, it is necessary to process the data by digital signal analysis method.
Yuan Rui, Zhu Rui, Xie Shiwen, Hu Wei, Zhou Fengjuan, Yu Ye   +5 more
doaj   +2 more sources

When volcanoes record Milankovitch cycles

Frontiers in Earth Science
Cyclic fluctuations in the frequency and intensity of volcanic activity are recorded during periods of global climate change. Volcano-sedimentary successions (e.g., in near-coastal environments) may reveal the interplay of glacio-eustatic fluctuations ...
Gianluca Sottili, Danilo M. Palladino
doaj   +2 more sources

Pacing of Paleozoic macroevolutionary rates by Milankovitch grand cycles [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2018
SignificanceThere has been long-standing debate about the relative roles of intrinsic biotic interactions vs. extrinsic environmental factors as drivers of biodiversity change. Here, we show that, relatively early in the history of complex life, Milankovitch “grand cycles” associated with astronomical rhythms explain between 9 and 16% of variation in ...
James S Crampton, Stephen R Meyers, Roger A Cooper   +2 more
exaly   +5 more sources

Milankovitch cycles and the astronomical time scale of the Zhujiang Formation in the Baiyun Sag, Pearl River Mouth Basin, China

Open Geosciences, 2022
The Zhujiang Formation in the Baiyun Sag, Pearl River Mouth Basin, China, is formed primarily in a deep-water continental slope environment. Its chronostratigraphic framework is based on biostratigraphy and sequence stratigraphy, and its geological ...
He Ping, Zhang Shangfeng, Xu Enze, Zhu Chunxia   +3 more
doaj   +2 more sources

Orbital eccentricity and internal feedbacks drove the Triassic megamonsoon variability [PDF]

Scientific Reports
The evolution of the Triassic megamonsoon was closely linked to Earth’s orbital variations. Despite recognizing secular orbital cycles as a fundamental pacemaker of the megamonsoon, the driving mechanisms remain unclear. Here, we use data-model synthesis
Runjian Chu, Huaichun Wu, Jian Zhang, Qiang Fang, Christian Zeeden, Peng Chen, Rukai Zhu, Jingwei Cui, Shihong Zhang, Tianshui Yang, Chengshan Wang   +10 more
doaj   +2 more sources

Application of porosity logs for cyclostratigraphic analysis in the absence of gamma ray logs [PDF]

Scientific Reports
High-resolution cyclostratigraphic and sequence stratigraphic analyses are often compromised and lead to incorrect interpretations due to the unavailability or critical, proven errors in the reference Gamma-Ray (GR) and Density (RHOB) logs in hydrocarbon
Amir Alimardanian, Ali Kodkhodaie, Mohsen Aleali, Mehran Arian, Davood Jahani   +4 more
doaj   +2 more sources