Results 51 to 60 of about 1,954 (223)

Polar Front System Variability and Its Control on Export Rain Ratio Over the Past 800 ka: Implication for Atmospheric pCO2 Changes

Paleoceanography and Paleoclimatology, Volume 41, Issue 3, March 2026.
Abstract Little is known about long‐term variability in the organic carbon to carbonate carbon export rain ratio, despite its key role in the global carbon cycle. Here, we reconstruct glacial‐interglacial changes in the sedimentary rain ratio over the Southern Ocean, using micropaleontological (coccoliths and foraminifera) and geochemical (CaCO3, Total
Yu Wang, Stéphanie Duchamp‐Alphonse, Sophie Sépulcre, Margaux Brandon, Elisabeth Michel, Nicolas Pige, Xavier Crosta, Johan Étourneau, Vikki Lowe, Annachiara Bartolini, Franck Bassinot, Gulay Isguder, Patricia Richard, Fatima Manssouri, Julius Nouet, Ludwig Jardillier, Samuel L. Jaccard   +16 more
wiley   +1 more source

Paleoproductivity as carbon of sediment core GeoB1523-1

, 2004
Paleoproductivity as carbon of sediment core GeoB1523-
Rühlemann, Carsten, Carsten Rühlemann (6975671)   +1 more
core   +1 more source

Linking Paleoclimate, Survey, and Farming Data at the Local Scale: A Case Study from Central Mesa Verde

Journal of Computer Applications in Archaeology
To understand human-climate dynamics in the past, archaeologists must reconstruct how social practices and climate conditions interacted at local scales.
S. Field, D. M. Glowacki
doaj   +1 more source

The Paleoenvironment and Mechanisms of Organic Matter Enrichment of Shale in the Permian Taiyuan and Shanxi Formations in the Southern North China Basin

Journal of Marine Science and Engineering, 2023
The organic-rich shale of the Permian Taiyuan Formation (TYF) and Shanxi Formation (SXF) in the Southern North China Basin (SNCB) is considered a potential shale gas source.
Yanan Wang, Xiulei Cheng, Kai Fan, Zhipeng Huo, Lin Wei   +4 more
doaj   +1 more source

Laguna Fuente de Piedra: An example of a dolomite factory recording ~50,000 years of depositional and paleoclimatic evolution

The Depositional Record, Volume 12, Issue 1, February 2026.
This study characterises carbonate mineral precipitation mechanisms and their paleoenvironmental implications in a semi‐arid, saline playa lake system. SEM image with EDS spectra shows microcrystalline, spherical shaped dolomite crystals from Laguna Fuente de Piedra composed of nanocrystals with bacterial voids and EPS.
Zeina Naim, Guolai Li, Luis Gibert, Jan‐Berend Stuut, Gonzalo Jiménez‐Moreno, Mónica Sánchez‐Román   +5 more
wiley   +1 more source

Age model and export paleoproductivity of sediment core PS1648-1 (fig 7)

, 2002
Age model and export paleoproductivity of sediment core PS1648-1 (fig ...
Hannes Grobe (6967961), Franz Gingele (6963407), Dieter K Fütterer (6886034), Grobe, Hannes, Fütterer, Dieter K, Gingele, Franz   +5 more
core   +1 more source

Radiolarian assemblage from the Upper Permian Wujiaping Formation in the eastern Sichuan Basin and its hydrocarbon source significance

地质科技通报
Objective The upper Permian Wujiaping Formation in the Hongxing area of eastern Sichuan Province has good shale gas accumulation conditions and is also an important successor for Permian shale gas exploration in the Sichuan Basin.
Yuhao YI, Hanyong BAO, Hongtao ZHU, Yaqiu LU, Zhiyong MENG, Kai LI, Fayao CHEN   +6 more
doaj   +1 more source

Biogenic Opal Deposition in the Surveyor Fan (IODP Site U1417) in the Gulf of Alaska (North Pacific) During the Late Miocene to Early Pleistocene

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract International Ocean Discovery Program (IODP) Site U1417, located in the Surveyor Fan (Gulf of Alaska), preserves hemipelagic sediments influenced by glacial and fluvial depositional processes from the Cordilleran Ice Sheet in the Chugach–St. Elias Mountains and Coastal Mountains.
B. K. Khim, S. Kim, H. Asahi
wiley   +1 more source

Geochemistry, sediment components, and paleoproductivity reconstruction for the Miocene to early Pliocene of ODP Hole 177-1088B

, 2005
Geochemistry, sediment components, and paleoproductivity reconstruction for the Miocene to early Pliocene of ODP Hole 177 ...
Katharina Billups (6963731), Lieselotte Diester-Haass (7886339), Diester-Haass, Lieselotte, Emeis, Kay-Christian, Kay-Christian Emeis (6958973), Billups, Katharina   +5 more
core   +1 more source

Effects of the Sedimentary Environment on Organic-Rich Shale in the Intracratonic Sag of the Sichuan Basin, China

Applied Sciences
The enrichment of organic matter in high-quality marine shale is generally controlled by factors such as the redox conditions of sedimentary environments, productivity levels, terrigenous input, and ancient productivity.
Xuewen Shi, Jia Liu, Yiqing Zhu, Liang Xu, Yuran Yang, Chao Luo, Yanyou Li, Kesu Zhong, Xue Yang, Qiuzi Wu, Liang He, Demin Shi, Xingzhi Wang   +12 more
doaj   +1 more source