Results 81 to 90 of about 140,407 (217)

Foraminifera from the Campanian–Maastrichtian of the Miriri Sub-Basin, Paraíba Basin, Brazil: implications for biostratigraphy and paleoenvironmental reconstruction [PDF]

Anais da Academia Brasileira de Ciências
This study investigates the core RT-01-PB from the Miriri Sub-Basin, Paraíba Basin, analyzing planktic and benthic foraminifera from the upper Campanian to lower Maastrichtian. The strata belong to the Itamaracá and Gramame formations. Lithostratigraphic,
HOLES P. DE SANTANA, ROBBYSON M. MELO, AGATHE A. NOUCOUCOUK, CLEIDE REGINA MOURA, ENELISE KATIA PIOVESAN   +4 more
doaj   +1 more source

New Constraints on the Onset of Antarctic Glaciation From Combined Radiogenic Hafnium and Neodymium Isotopes

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The drawdown of atmospheric CO2 likely triggered Antarctic glaciation during the Eocene‐Oligocene Transition (34 Ma). Accurately constraining this shift from “greenhouse” to an “icehouse” climate is essential for understanding global carbon cycle dynamics.
Keehwan Lee, Franco Marcantonio, Michael Bizimis, Howie D. Scher, Brian W. Romans, Lucien Nana Yobo   +5 more
wiley   +1 more source

Paleogene benthic foraminifer biostratigraphy and paleoecology at Site 647, Southern Labrador Sea [PDF]

, 1989
Benthic foraminifers were examined from the Paleogene of Ocean Drilling Program (ODP) Site 647 and Deep Sea Drilling Program (DSDP) Site 112 in the southern Labrador Sea.
M.A. Kaminski, Kaminski, M.A., W.A. Berggren, Gradstein, F.M., F.M. Gradstein, Berggren, W.A.   +5 more
core   +1 more source

Multi‐proxy sequence stratigraphy of a mixed carbonate–siliciclastic shelf across the Jurassic–Cretaceous transition

The Depositional Record, Volume 12, Issue 4, September 2026.
An integrated facies, MS and XRF‐based approach applied to the Tithonian–Berriasian Sidi Khalif Formation (central Tunisia) resolves five Tithonian and eight Berriasian third‐order sequences, showing how mixed carbonate–siliciclastic shelves record coupled eustatic, climatic and tectonic controls and providing a transferable template for similar mud ...
Hamdi Omar, Adnene Lafi, Chokri Yaich
wiley   +1 more source

A tubular protozoan predator: a burrow selectively filled with tubular agglutinated protozoans (Xenophyophorea, Foraminifera) in the abyssal South China Sea [PDF]

, 2004
We report the occurrence of an unusual agglutinated protozoan-filled burrow recovered in a box core collected in 1998 from a depth of 2496 m in the South China Sea.
Kaminski, M.A., Wetzel, A.
core  

Testing the impact of diagenesis on the delta O-18 and delta C-13 of benthic foraminiferal calcite from a sediment burial depth transect in the equatorial Pacific [PDF]

, 2013
Stable oxygen and carbon isotope (O-18 and C-13) values measured in foraminiferal calcite are one of the primary tools used in paleoceanography. Diagenetic recrystallization of foraminiferal calcite can act to reset primary isotopic values, but its ...
Wilson, Paul, Wilson, Paul A., Edgar, Kirsty M., Paelike, Heiko, Pälike, Heiko, Edgar, Kirsty M.; id_orcid   +5 more
core   +1 more source

How life affects mineral formation: A reappraisal of concepts and terminology

The Depositional Record, Volume 12, Issue 4, September 2026.
We present a moderately revised terminology of concepts how life may influence mineral formation. This framework would be more consistent and universally applicable. Abstract Numerous biological factors have been proposed to influence the formation of minerals under Earth‐surface conditions, but the underlying concepts are often confused due to ...
Patrick Hadrian Meister, Nereo Preto
wiley   +1 more source

Taxonomy and biostratigraphy of new and emended species of Cenozoic deep-water agglutinated foraminifera from the Labrador and North Seas [PDF]

, 1989
Deep marine, fine grained sedimentary strata of Maastrichtian through Miocene age in the Labrador and North Sea sedimentary basins are rich in agglutinated benthic foraminifera.
Gradstein, F. M., Kaminski, M. A.
core  

Diagenetic evolution and geochemical controls on carbonate platform development in the Middle Eocene Jahrum Formation, Zagros Basin

The Depositional Record, Volume 12, Issue 4, September 2026.
Integrated petrographic, mineralogical and geochemical workflow for reconstructing the diagenetic evolution of the Middle Eocene Jahrum Formation in the Zagros Basin. The diagram illustrates the methodological framework combining field observations, laboratory analyses (XRD, SEM‐EDS, stable isotopes, cathodoluminescence), pyrite framboid geochemistry ...
Mehdi Baniasadi, Vahid Ahmadi, Mohammad Reza Esmaeilbeig, Pooria Kianoush   +3 more
wiley   +1 more source

Benthic Foraminiferal Oxygen Isotope Offsets Over The Last Glacial-Interglacial Cycle

, 2010
The oxygen isotope (?18O) offset between contemporaneous benthic foraminiferal species is often assumed constant with time and geographic location. We present an inventory of benthic foraminiferal species ?18O offsets from the major ocean basins covering
Hoogakker, Babette; id_orcid, Crowhurst, Simon, Hoogakker, Babette A. A., Babette Hoogakker, Simon Crowhurst, Oliver, K, Elderfield, Henry, Henry Elderfield, Elderfield, H, Hoogakker, Babette, Crowhurst, S, Hoogakker, B, Kevin Oliver, Oliver, Kevin   +13 more
core   +1 more source