Results 31 to 40 of about 5,998 (184)

The equatorial Pacific High-Productivity Belt: Elements for a Synthesis of Deep Sea Drilling Project Leg 85 Resultspaleoceanography [PDF]

, 1985
Leg 85 of the Deep Sea Drilling Project operated in the eastern central Pacific in the region of the equatorial highproductivity belt. We recovered uppermost Eocene to Quaternary reference sections amenable to fine-scale stratigraphic and ...
Barron, John A., Mayer, Larry A., Theyer, Fritz, Thomas, Ellen   +3 more
core   +2 more sources

Enhancing event stratigraphic correlations in the ultra‐deep Japan Trench using XRF‐CS cluster‐based chemostratigraphy

The Depositional Record, Volume 12, Issue 1, February 2026.
Cluster‐based chemostratigraphy using XRF‐CS enables high‐resolution correlation of event deposits across contrasting depositional settings in the Japan Trench. This approach reveals previously unrecognised events and compositional heterogeneity, offering new insights into sediment provenance and earthquake‐triggered deposition, with implications for ...
Jyh‐Jaan Steven Huang, Charlotte Pizer, Jun‐Ting Lin, Ken Ikehara, Michael Strasser   +4 more
wiley   +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

Silicate and Carbonate Weathering Perturbation at the Eocene‐Oligocene Transition Recorded by Mg Isotopes

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract During the Eocene‐Oligocene Transition (ca. 34 Ma), the Earth underwent a dramatic decline in atmospheric CO2, global cooling, a deepening of the carbonate compensation depth (CCD), and the formation of a permanent ice sheet on Antarctica. The expansion of Antarctic glaciers eroded the underlying bedrock and increased the weathering flux to ...
Adam D. Sproson, Toshihiro Yoshimura, Shigeyuki Wakaki, Takahiro Aze, Yusuke Yokoyama, Tsuyoshi Ishikawa, Naohiko Ohkouchi   +6 more
wiley   +1 more source

Changes in the Indonesian Throughflow Since the Late Miocene Based on Radiolarian Assemblages From ODP Site 710 in the Western Tropical Indian Ocean: Implications of the Indo‐Pacific Gateway (Indonesian Seaway)

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract The Indo‐Pacific Gateway is a narrow tropical passage connecting the Pacific and Indian Oceans, and alterations in its topographic configuration can significantly influence the volume of water exchanged between the two oceans through the Indonesian Throughflow (ITF).
Shin‐ichi Kamikuri, Kenji M. Matsuzaki
wiley   +1 more source

On the Cretaceous origin of the Order Syracosphaerales and the genus Syracosphaera [PDF]

, 2017
New scanning electron microscope observations of unadulterated calcareous nannofossil assemblages on lamina surfaces of Cretaceous Tanzania Drilling Project sediments reveal high diversity in the < 3 μm size-range and high abundances of small and ...
Bown, PR, Lees, JA, Young, JR
core   +1 more source

Evaluating the Reliability of Grain‐Size Sorting for Organic Biomarker Analysis

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Organic and inorganic geochemical proxies are fundamental for interpreting past climate variability. For inorganic analysis, marine sediments are often size fractionated to isolate foraminifera, while organic analysis employs subsamples of bulk sediment.
J. S. Hingley, P. S. Bray, T. Agterhuis, G. L. Foster, B. S. Wade, J. H. Whiteside, G. N. Inglis   +6 more
wiley   +1 more source

Petrogenesis of diachronous mixed siliciclastic-carbonate megafacies in the cool-water Oligocene Tikorangi Formation, Taranaki Basin, New Zealand [PDF]

, 2003
The Oligocene (Whaingaroan-Waitakian) Tikorangi Formation is a totally subsurface, lithostratigraphically complex, mixed siliciclastic-limestone-rich sequence forming an important fracture reservoir within Taranaki Basin, New Zealand.
Berggren W. A., Bernecker T., Driscoll N. W., Hood S. D., Hudson D. S., Hume T. R., Mauri S., Morgans H. E. G., Mullins H. T., Mullins H. T., Naish T. R., Nelson C. S., Nelson C. S., Palmer J. A., Rao C. P., Scott G. H., Simpson J., Tucker M., Westphal H., Young J.   +19 more
core   +2 more sources

Revised History of Pleistocene Vertical Motions in NE Sicily and Southern Calabria, Italy, From 40Ar/39Ar Dating and Fault Zone Morphology

Tectonics, Volume 45, Issue 2, February 2026.
Abstract Long‐term rates of crustal uplift in southern Calabria and NE Sicily are incompletely understood due to limited information about the age of marine terraces at 1.0–1.3 km above sea level (asl). This study provides a new constraint on high‐elevation terrace ages through integrated analysis of geochronology, stratigraphy, shoreline modeling, and
Rebecca J. Dorsey, Gianfranco Di Vincenzo, Marco Meschis, Sergio G. Longhitano, William Cavazza, Domenico Chiarella   +5 more
wiley   +1 more source

Organic Carbon Burial following the Middle Eocene Climatic Optimum (MECO) in the central - western Tethys

, 2010
We present trace metal geochemistry and stable isotope records for the middle Eocene Alano di Piave section, NE Italy, deposited during magnetochron C18n in the marginal Tethys Ocean. We identify a $\sim$ 500 kyr long carbon isotope perturbation event we
C. Agnini, D. J. A., D. Rio, E. Fornaciari, G. Muttoni., H. Pälike, L. Giusberti, L. Lanci, Spofforth, V. Luciani   +9 more
core   +1 more source