Results 81 to 90 of about 53,108 (242)

Integrated stratigraphy of the Waitakian-Otaian Stage boundary stratotype, Early Miocene, New Zealand [PDF]

, 1999
The base of the type section of the Otaian Stage at Bluecliffs, South Canterbury, is recognised as the stratotype for the boundary between the Waitakian and Otaian Stages.
Allan R. S., Armentrout J. M., Be A. W. H., Berggren W. A., Berggren W. A., Carter R. M., Carter R. M., Edwards A. R., Edwards A. R., Edwards A. R., Finlay H. J., Finlay H. J., Finlay H. J., Gair H. S., Gasperi J. T., Graham I. J., Gudex M. C., Gudex M. C., Hayward B. W., Heider F., Hornibrook N. de B., Jenkins D. G., Jenkins D. G., Laws C. R., Li Q., Martini E., Marwick J., Maxwell P. A., McGowran B., Park J., Pocknall D. T., Scott G. H., Scott G. H., Scott G. H., Scott G. H., Steininger F. F., Thomson J. A., Wei W., Wilson G. J., Wilson G. S., Wright J. D.   +40 more
core   +2 more sources

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

LOWER TO MIDDLE TOARCIAN FROM THE COIMBRA REGION (LUSITANIAN BASIN, PORTUGAL): SEQUENCE STRATIGRAPHY, CALCAREOUS NANNOFOSSILS AND STABLE-ISOTOPE EVOLUTION

Rivista Italiana di Paleontologia e Stratigrafia, 2004
This multidisciplinary study (facies analysis, sequence stratigraphy, calcareous nannofossils and carbon stable isotopes) focuses on the Lower to Middle Toarcian succession cropping out in the Coimbra region (Northern sector of the Lusitanian Basin ...
LUÍS DUARTE, NICOLA PERILLI, RODOLFO DINO, RENÉ RODRIGUES, RICARDO PAREDES   +4 more
doaj   +1 more source

THE OLIGOCENE/MIOCENE BOUNDAR Y IN THE EQUATORIAL ATLANTIC DSDP SITE 354. RESULTS OF STUDIES ON PLANKTIC FORAMINIFERA AND CALCAREOUS NANNOFOSSILS

Rivista Italiana di Paleontologia e Stratigrafia, 2023
A first order correlation between planktic foraminiferal and calcareous nannofossil events o( DSDP Site 354 in the Equatorial Atlantic is presented. Within the 323 m thick, discontinuously cored section, 30 sarnples have been studied.
MILENA BlOLZI
doaj  

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

Biostratigraphic Study of the Calcareous Nannofossils of Well 02, Shallow Offshore, Niger Delta, Nigeria

, 2014
A calcareous nannofossils biostratigraphic study has been carried out on the strata penetrated of well 02 located in the shallow offshore area of the Niger Delta, Nigeria.
Y. Alkali, E. Okosun, U. S. Onoduku
semanticscholar   +1 more source

Hydrothermal Circulation During Continental Breakup: Evolution of a Subseafloor Stockwork Mineralization at the South China Sea Rifted Margin

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract Hydrothermal activity during continental breakup and early oceanic spreading is poorly understood due to limited samples. A basalt‐hosted hydrothermal mineralization, drilled during IODP Expedition 367/368 at the northern South China Sea at the continent‐ocean transition provides a unique opportunity to investigate this phenomenon.
Jörg Follmann, Froukje M. van der Zwan, Sven Petersen, Matthias Frische   +3 more
wiley   +1 more source

Investigating the Timescale of Weathering Signals Preserved in Marine Sediments—Insights From the Holocene Mediterranean

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract The climate–weathering feedback exerts a vital role in long‐term planetary habitability. However, its operational timescales remain unclear due to challenges in quantifying past weathering intensity, especially in marine sediments—the final sink of continental weathering fluxes. Using Holocene Mediterranean sediments as a test case, we examine
Jiawang Wu, Shengnan Yao, Yulong Guo, Christophe Colin, Andrea Zerboni, Amalia Filippidi, Sicheng Wang, Zhifei Liu, Shouye Yang, Gert J. de Lange   +9 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

Reconstruction of a latest Paleocene shallow-marine eutrophic paleoenvironment at Sidi Nasseur (Central Tunisia) based on foraminifera, ostracoda, calcareous nannofossils and stable isotopes (delta¹³C delta¹⁸O) [PDF]

, 2009
In order to unravel faunal and paleoenvironmental parameters in shallow marine settings prior to the Paleocene-Eocene thermal maximum, we investigated the Sidi Nasseur section (NAS) in Central Tunisia.
Stassen, P., Dupuis, C., Morsi, A.-M.M., Steurbaut, E., Speijer, R.P.   +4 more
core   +3 more sources