Results 31 to 40 of about 1,700 (166)

Calcification, Dissolution and Test Properties of Modern Planktonic Foraminifera From the Central Atlantic Ocean

Frontiers in Marine Science, 2022
The mass of well-preserved calcite in planktonic foraminifera shells provides an indication of the calcification potential of the surface ocean. Here we report the shell weight of 8 different abundant planktonic foraminifera species from a set of core ...
Stergios D. Zarkogiannis, Shinya Iwasaki, James William Buchanan Rae, Matthew W. Schmidt, P. Graham Mortyn, P. Graham Mortyn, George Kontakiotis, Jennifer E. Hertzberg, Rosalind E. M. Rickaby   +8 more
doaj   +1 more source

Contourite erosional and depositional features of the Maastrichtian chalk on Jasmund peninsula (Rügen island, NE Germany)

Sedimentology, EarlyView.
ABSTRACT Seismic‐scale features such as deeply incised submarine valleys and mounded drifts together with ichnological features indicative of discontinuous sedimentation and erosional episodes have recently been documented from the Upper Cretaceous chalk in the southern Baltic Sea area.
Marcel Schlembach, Heiko Hüneke, Mike Reich, Svante Peters, Nele Ahlhaus, Sylvia Weinert, Arwed Gibb   +6 more
wiley   +1 more source

Foraminifera from the Tepetate Formation (Heim) at Las Pocitas, Baja California Sur, Mexico

Ciencias Marinas, 2008
In order to constrain the age and depositional paleoenvironment of the Tepetate Formation, benthic and planktonic foraminifera were analyzed in samples recovered from an exploration well located at Las Pocitas, Baja California Sur, Mexico.
AY Miranda-Martínez, AL Carreño
doaj   +1 more source

STRATIGRAPHY AND MICROFACIES STUDIES ON SOME TERTIARY ROCKS IN NORTH GALALA PLATEAU, NORTH EASTERN DESERT, EGYPT [PDF]

Delta Journal of Science, 2006
The early and middle Eocene successions of Wadi EL Qena (Sec. II) and Wadi El Agramiya (Sec. I) surface sections in west El Galala El-Baharia area, north Eastern Desert, were examined in detail.
A. Galal, A.S. EL-Dawoody
doaj   +1 more source

Palaeoenvironmental, palaeoecological and palaeobiogeographical implications of mixed fresh water and brackish marine assemblages from the Cretaceous-Palaeogene Deccan intertrappean beds at Jhilmili, Chhindwara District, central India

Revista Mexicana de Ciencias Geológicas, 2018
The Deccan infra- and intertrappeans volcano-sedimentary sequences have been considered as terrestrial to fluvio-lacustrine deposits. Presence of planktonic foraminifera and brackish water ostracods in the Jhilmili basal Danian intertrappean beds ...
Ashu Khosla
doaj   +1 more source

Facies and paleoenvironmental reconstruction of Early–Middle Miocene deposits in the north-west of the Zagros Basin, Iran

Geologica Carpathica, 2019
Facies analysis and paleoenvironmental reconstruction of the Burdigalian to Langhian Asmari Formation, outcropping in the Khorram Abad Anticline, in the north-west of the Zagros Basin allow us to interpret the carbonate ramp history during the Early ...
Roozpeykar Asghar, Maghfouri-Moghaddam Iraj, Yazdi Mehdi, Yousefi-Yegane Bizhan   +3 more
doaj   +1 more source

Rapid Changes in Southern Ocean Upper‐Water Temperature Linked to Shift of the Southern Hemisphere Westerlies Since the Last Glacial

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract The pattern and cause of upper‐water temperature (UWT) variations on millennial timescales in the Southern Ocean (SO) and the mechanism of their interaction with high‐latitude Northern Hemisphere climate remain unclear. Here, we reconstructed millennial‐scale subsurface temperature (subST) records from the Weddell Sea during the Last Glacial ...
Tong Wang, Thomas Algeo, Qi Jia, Peng Zhang, Jian Xu, Bingbin Qin, Yihao Hu, Jiakai Wang, Zhifang Xiong, Tiegang Li   +9 more
wiley   +1 more source

Projected impacts of climate change and ocean acidification on the global biogeography of planktonic Foraminifera [PDF]

Biogeosciences, 2015
Planktonic Foraminifera are a major contributor to the deep carbonate flux and their microfossil deposits form one of the richest databases for reconstructing paleoenvironments, particularly through changes in their taxonomic and shell composition. Using
T. Roy, F. Lombard, L. Bopp, M. Gehlen
doaj   +1 more source

Identification and correlation of the Aso‐3 tephra in the Omaezaki area, central Japan: A valuable key stratum for the MIS 6/5 transition period

Journal of Quaternary Science, Volume 41, Issue 6, Page 972-986, August 2026.
ABSTRACT The Aso‐3 tephra is one of the most significant widespread marker layers from the Middle to Late Pleistocene, generated by a large caldera‐forming eruption at the Aso volcano in Kyushu, southwestern Japan. Despite its importance, a distal co‐ignimbrite ash correlative has yet to be clearly identified, primarily because although volcanic glass ...
Toshinori Sasaki, Takuya Morimoto, Tatsuyuki Ueno, Kazuo Mizoguchi, Norihisa Goto, Hisanori Ominami, Shohei Onaka   +6 more
wiley   +1 more source

Planktonic Foraminifera Biostratigraphy Of Taeno Limestone, Ambon, Maluku Province, Indonesia

JGEET: Journal of Geoscience, Engineering, Environment and Technology
The limestone became exposed to the surface because of an uplift event during the Quaternary period. This study aims to determine the age of limestone outcrops in the Taeno Traverse using planktonic foraminifera.
Zulfiah, Sanny V. Aponno, Erfin Elly
doaj   +1 more source