Results 31 to 40 of about 291 (173)

On the peritidal cycles and their diagenetic evolution in the Lower Jurassic carbonates of the Calcare Massiccio Formation (Central Apennines)

Geologica Carpathica, 2015
This paper shows the environmental changes and high-frequency cyclicity recorded by Lower Jurassic shallow-water carbonates known as the Calcare Massiccio Formation which crop out in the central Apennines of Italy.
Brandano Marco, Corda Laura, Tomassetti Laura, Testa Davide   +3 more
doaj   +1 more source

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

Sedimentology, Volume 73, Issue 5, Page 1631-1663, August 2026.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi, Isabel Abad, Elisa Laita, Ali Mokhtar Samet, Matías Reolid   +4 more
wiley   +1 more source

Establishment of an Astronomical Time Scale and Discussion on the Sedimentary Origin of the Member 4 Glutenite, Paleogene Wenchang Formation, Enping 21 Sag, Zhu III Depression, Pearl River Mouth Basin, South China Sea

Journal of Marine Science and Engineering
Coarse-grained clastic systems in rift basins are often considered unfavorable for preserving continuous astronomical records. This study investigates the thick conglomeratic succession in the upper Member 4 (43.90–44.73 Ma) of the Wenchang Formation in ...
Shangfeng Zhang, Yuying Feng, Yaning Wang, Rui Han, Gaoyang Gong, Xinwei Qiu   +5 more
doaj   +1 more source

Nonmarine time-stratigraphy in a rift setting: An example from the Mid-Permian lower Quanzijie low-order cycle Bogda Mountains, NW China

Journal of Palaeogeography, 2015
Sedimentological and stratigraphic studies of seven stratigraphic sections of Permian Hongyanchi (HYC) and Quanzijie (QZJ) low-order cycles (LCs) in the Tarlong-Taodonggou half graben and Dalongkou area in Bogda Mountains, NW China, demonstrate effective
Jonathan Obrist-Farner, Wan Yang
doaj   +1 more source

REPRODUCIBILITY IN CYCLOSTRATIGRAPHY: INITIATING AN INTERCOMPARISON PROJECT

Geological Society of America Abstracts with Programs, 2017
The study of astronomical climate forcing and the application of cyclostratigraphy have experienced a spectacular growth over the last decades. In the field of cyclostratigraphy a broad range in methodological approaches exist. However, comparative study between the different approaches is lacking.
Sinnesael, Matthias, De Vleeschouwer, David, Zeeden, Christian, Claeys, Philippe   +3 more
openaire   +4 more sources

Search for impact ejecta at the Paleocene–Eocene boundary

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1585-1592, July 2026.
Abstract Almost 10 years have passed since microtektites and microkrystites were reported for the Paleocene–Eocene (P–E) boundary in drill cores and outcrop in New Jersey and in ODP Hole 1051B in the western North Atlantic. The glassy spherules were interpreted to reflect an impact trigger for the Paleocene–Eocene Thermal Maximum (PETM).
Birger Schmitz, Yue Cai, Shiyong Liao, Victoriano Pujalte, Ting Ruan, Robert P. Speijer, Ellen Thomas   +6 more
wiley   +1 more source

Toward a Robust Plio‐Pleistocene Chronostratigraphy for ODP Site 762

Geophysical Research Letters, 2020
The advent of rapidly acquired proxy records provides paleoceanographers and paleoclimatologists with a wealth of high‐resolution data. These data are a boon for the community, as they enable millennial or even submillennial scale interpretation of past ...
Gerald Auer, David De Vleeschouwer, Beth A. Christensen   +2 more
doaj   +1 more source

The Wunstorf Drilling Project: Coring a Global Stratigraphic Reference Section of the Oceanic Anoxic Event 2 [PDF]

Scientific Drilling, 2007
The Wunstorf drilling project aims at establishing a high resolution stable isotope record for the black shale succession (OAE 2) of the CTBI and developing this into a globally applicable high resolutionbio- and chemostratigraphic reference section ...
Markus Wilmsen, Jörg Mutterlose, Jochen Erbacher, the Wunstorf Drilling Scientific Party, Thomas Wonik   +4 more
doaj   +1 more source

Late Eocene to Early Oligocene (36–26 Ma) Rock Magnetism and Magnetostratigraphy of IODP Site U1553, Southwestern Pacific: Defying the Challenges of Carbonate Dilution and Reductive Diagenesis

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract The late Eocene to early Oligocene is an intriguing Paleogene period in which the Earth climate state changed from Warmhouse to Coolhouse. Accurate age models are essential for investigating these climate transitions. The southwestern Pacific International Ocean Discovery Program (IODP) Site U1553, with its almost complete succession of the ...
Yang Zhang, Wanzhang Wang, Tilo von Dobeneck, Anna Joy Drury, Thomas Frederichs, Wei Yuan   +5 more
wiley   +1 more source

The Cyclostratigraphy Intercomparison Project (CIP)

Earth-Science Reviews, 2019
Cyclostratigraphy is an important tool for understanding astronomical climate forcing and reading geological time in sedimentary sequences, provided that an imprint of insolation variations caused by Earth's orbital eccentricity, obliquity and/or precession is preserved (Milankovitch forcing).
Sinnesael, Matthias, De Vleeschouwer, David, Zeeden, Christian, Batenburg, Sietske J., Da Silva, Anne Christine, de Winter, Niels J., Dinarès-Turell, Jaume, Drury, Anna Joy, Gambacorta, Gabriele, Hilgen, Frederik J., Hinnov, Linda A., Hudson, Alexander J.L., Kemp, David B., Lantink, Margriet L., Laurin, Jiří, Li, Mingsong, Liebrand, Diederik, Ma, Chao, Meyers, Stephen R., Monkenbusch, Johannes, Montanari, Alessandro, Nohl, Theresa, Pälike, Heiko, Pas, Damien, Ruhl, Micha, Thibault, Nicolas, Vahlenkamp, Maximilian, Valero, Luis, Wouters, Sébastien, Wu, Huaichun, Claeys, Philippe   +30 more
openaire   +13 more sources