Results 81 to 90 of about 12,744 (240)

Nanofósiles calcáreos paleógenos y biostratigrafía para dos pozos en el este de la Cuenca Austral, Patagonia, Argentina [PDF]

, 2013
Calcareous nannofossils from two boreholes (Campo Bola and Sur Río Chico) in the subsurface of eastern Austral Basin, Santa Cruz Province, Argentina, allowed the identification of Early to Middle Paleocene, Early to Middle Eocene and Late Eocene to Early
Perez Panera, Juan Pablo
core   +2 more sources

Antarctic Intermediate Water Variability in the South Atlantic Over the Last 600,000 years

Paleoceanography and Paleoclimatology, Volume 40, Issue 12, December 2025.
Abstract Despite its importance as a key component of the Atlantic Meridional Overturning Circulation, the long‐term variability of Antarctic Intermediate Water (AAIW) remains poorly constrained due to the lack of adequate proxy records. To address this, we present the longest reconstruction of AAIW variability in the South Atlantic using authigenic ...
Oluwaseun Soaga, Ed Hathorne, Martin Frank, Polina Tselykh, Lena Jebasinski, Dirk Nürnberg   +5 more
wiley   +1 more source

DINOFLAGELLATE CYSTS AND CALCAREOUS NANNOFOSSILS FROM THE UPPER CRETACEOUS SARACENO FORMATION (CALABRIA, ITALY): IMPLICATIONS ABOUT THE HISTORY OF THE LIGURIDE COMPLEX

Rivista Italiana di Paleontologia e Stratigrafia, 2003
Organic-walled dinoflagellate cysts and calcareous nannofossils recovered from the turbidites of the Saraceno Formation outcropping in the type area (north-eastern Calabria, Italy) are presented. They provide new information about the age of the Saraceno
STEFANO TORRICELLI, MARIA ROSA AMORE
doaj   +1 more source

Cyclic Pockmark Formation Linked to Plio‐Pleistocene Sea‐Level Rise on the Chatham Rise, New Zealand

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract Pockmarks are geomorphological depressions on the seafloor in various underwater environmental settings. They are commonly linked to fluid release from subsurface reservoirs; however, the processes involved, fluid types, and relative timing of their formation often remain enigmatic.
Fynn Warnke, Ingo A. Pecher, Lorna J. Strachan, Jess I. T. Hillman, Brandon Dugan   +4 more
wiley   +1 more source

Biostratigraphy of the upper part of Aitamir Formation based on calcareours nannofossils, Cherli section (NW Kopet-Dagh) [PDF]

Journal of Stratigraphy and Sedimentology Researches, 2017
Introduction The Kopet-Dagh sedimentary basin is located in north-east Iran, southern Turkmenistan and Afghanistan and is composed of Mesozoic and Cenozoic sedimentary successions. Fifteen formations have been introduced in the Kopet-Dagh Basin.
Saeideh Senemari, Seyed Naser Raisossadat, Maryam Motamedalshariati, Mohsen Behroozy   +3 more
doaj   +1 more source

Stratigraphic Analysis of Azmir-Goizha anticline by Nannofossils

, 2013
The Azmir-Goizha anticline elongates directly to north and northeast boundary of Sulaimani city, Kurdistan Region, NE-Iraq. The anticline is originally consisted of two main connected anticlines (Goizha and Azmir anticlines) at southwest and northwest ...
Kamal Haji Karim Haji Karim, Araz Omer Salih, S. Ahmad   +2 more
semanticscholar   +1 more source

Expedition 306 summary

, 2006
The overall aim of the North Atlantic paleoceanography study of Integrated Ocean Drilling Program Expedition 306 is to place late Neogene–Quaternary climate proxies in the North Atlantic into a chronology based on a combination of geomagnetic ...
Aboud, Essam, Acton, Gary D., Akimoto, Kazumi, Alvarez Zarikian, Carlos A., Bailey, Ian, Bjørklund, Kjell R., Evans, Helen, Fang, Nianqiao, Ferretti, Patrizia, Gruetzner, Jens, Guyodo, Yohan J.B., Hagino, Kyoko, Harris, Robert, Hatakeda, Kentaro, Hefter, Jens Norbert, Higgins, Sean M., Judge, Shelley A., Kanamatsu, Toshiya, Kulhanek, Denise K., Nanayama, Futoshi, Nielsen, Simon H.H., Ohno, Masao, Rashid, Harunur, Sierro Sanchez, Francisco J., Stein, Ruediger, Voelker, Antje, Zhai, Qiumin   +26 more
core   +1 more source

Congruent Weathering of Continental Silicates During Warm Periods: Evidence From Lithium Isotopes in Marine Sediments

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Dissolution of secondary clay minerals during continental weathering (hereafter clay dissolution) has been proposed as a mechanism to explain some of the low seawater lithium isotopic ratios (δ7Li) observed in the geologic past. However, direct evidence for clay dissolution on Earth surface remains limited, and the controlling factors are ...
Zhewen Xu, Ruoshui Wang, Lianwen Liu, Jingxian Li, Junfeng Ji, Jun Chen, Gaojun Li   +6 more
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

The Cenomanian–Turonian boundary interval in the Western Canada Foreland Basin: Stratigraphy, geochemistry, geochronology and sea‐level changes recorded in expanded and condensed clastic successions

The Depositional Record, Volume 11, Issue 5, Page 1200-1258, November 2025.
Shallow‐marine mudstone of the Cretaceous Kaskapau Formation in the British Columbia foredeep preserves a 185 m thick record of OAE2. The organic carbon‐isotope and osmium‐isotope excursions can be correlated in detail with other Cenomanian–Turonian boundary sections around the world.
A. Guy Plint, Darren R. Gröcke, David Selby, Ireneusz Walaszczyk, Sandra L. Kamo, Ian Jarvis, João Trabucho‐Alexandre, Jessica Flynn, Frederick J. Longstaffe, Kienan P. Marion, Bogdan L. Varban, Alice D. C. Du Vivier, David Uličný   +12 more
wiley   +1 more source