Results 51 to 60 of about 266 (168)

Intermediate Water Sources and Sediment Provenance in the High‐Latitude South Pacific Ocean (Campbell Plateau) During the Paleogene

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 9, September 2025.
Abstract During the Paleogene, Earth experienced a significant transition from a hot to a cold climate, or from a “Hothouse” to a “Coolhouse.” In the warm early Paleogene, the oceanic environment lacked a large polar ice sheet and had a reduced equator‐to‐pole sea‐surface temperature gradient.
Erika Tanaka, Kazutaka Yasukawa, Ann G. Dunlea, Ingrid Hendy, Takashi Miyazaki, Bogdan Stefanov Vaglarov   +5 more
wiley   +1 more source

From Hydrocarbon to CO2 Storage: Unveiling the Potential of the Miocene Lille John Member in the Danish North Sea

Basin Research, Volume 37, Issue 5, September–October 2025.
Depositional evolution of the upper Miocene complex. ABSTRACT To achieve net‐zero carbon emissions by 2050, gigatonnes of CO2 must be captured and stored in the subsurface. Screening and exploration of prospective storage sites have thus gained momentum in recent years.
Zeenat Maniar, Florian Smit, Erik Skovbjerg Rasmussen, Kresten Anderskouv, Kenneth Bredesen, Lars Nielsen   +5 more
wiley   +1 more source

Sand Injection or Deposition: A Perspective From Mineral‐Chemical Stratigraphy

Basin Research, Volume 37, Issue 5, September–October 2025.
The main Gamma discovery Sandstone (Norwegian North Sea) in the Eocene Balder Formation shows features of intrusion but has an unusually high volume and net‐to‐gross. Heavy mineral data and spatial considerations link it to the Odin Member, suggesting it is autochthonous and retains its original stratigraphic position within the Balder Formation ...
Wiktor Marek Luzinski, Andrew Clifford Morton, Andrew Hurst   +2 more
wiley   +1 more source

Dinosterols or dinocysts to estimate dinoflagellate contributions to marine sedimentary organic matter? [PDF]

Limnology and Oceanography, 2007
Dinosterol (4α,23,24‐trimethyl‐5α‐cholest‐22E‐en‐3β‐ol) is frequently used as an alternative to dinoflagellate cyst (dinocyst) counting in paleoceanography to assess dinoflagellate inputs to marine sediments. However, recent studies have shown poor correlation between these two proxies in continental‐margin sediments.
Maggy Mouradian, Robert J. Panetta, Anne de Vernal, Yves GÉlinas   +3 more
openaire   +1 more source

Biostratigraphy, paleoenvironment and paleoclimate in northeastern Patagonia during the early Paleocene based on the micropaleontological record

Evolving Earth
The Península Valdés es-1 well exhibits the most complete stratigraphic record of an important Danian Atlantic marine event in Patagonia, Argentina.
M. Sol González Estebenet, M. Verónica Guler, Edgardo L. Navarro, Luis Palazzesi, Viviana D. Barreda, Juan P. Pérez Panera, Andrea Caramés   +6 more
doaj   +1 more source

Extending monitoring with sediment archive approaches: Comparison of biomonitoring, metabarcoding, and biomarkers to assess past phytoplankton dynamics

Limnology and Oceanography: Methods, Volume 23, Issue 8, Page 578-593, August 2025.
Abstract Sedimentary archives can provide valuable insights into the study of anthropogenic impacts on marine and limnic ecosystems over centennial and millennial timescales, potentially extending the temporal breadth of observation‐based biomonitoring.
Juliane Romahn, Alexandra Schmidt, Jérôme Kaiser, Damian Baranski, Helge W. Arz, Laura S. Epp, Anke Kremp, Miklós Bálint   +7 more
wiley   +1 more source

Diatom and Dinoflagellate Cyst Fluxes Over Four Annual Cycles in a High Arctic Fjord, Northeast Greenland

Global Biogeochemical Cycles, Volume 39, Issue 7, July 2025.
Abstract Retreating sea ice and freshening surface waters are rapidly changing Arctic coastal environments. To predict the impacts of cryosphere change, it is essential to understand ecosystem variability beyond the instrumental era. Diatoms and dinoflagellate resting cysts have been abundantly used to reconstruct past marine conditions.
M. Mäkelä, T. Luostarinen, S. Ribeiro, K. Weckström, M. Sejr, M. Winding, M. Heikkilä   +6 more
wiley   +1 more source

Depositional Ages, Sequence Stratigraphy and Transition Process of Forearc Setting From Paleogene Restricted Bay/Estuarine to Neogene Open‐Marine Deltaic/Slope Systems in the Sanriku‐Oki Forearc Basin, Northeast Japan

Basin Research, Volume 37, Issue 4, July–August 2025.
The Sanriku‐oki forearc basin along the Northeast Japan arc was transferred from the Cretaceous to Paleogene bay‐to‐estuarine basin restricted by the uplifted trench slope break to the Neogene open‐marine deltaic to slope basin due to a large‐scale subsidence, possibly related to the changes in the subducting plate condition.
Osamu Takano, Takashi Tsuji, Yasuhiro Yamada, Akira Ijiri, Tsuyoshi Ishikawa, Masafumi Murayama, Yasuo Kondo, Fumio Inagaki   +7 more
wiley   +1 more source

Cenomanian-Turonian dinocysts of North Hemisphere: some aspects of biogeography and paleogeography

Interexpo GEO-Siberia, 2022
Taxonomic typization of dinocyst assemblages was carried out on the basis of a qualitative and quantitative assessment of their generic composition for the Northern Hemisphere in the Cenomanian-Turonian time in order to identify correlation taxa. Typization was carried out by the method of cluster analysis according to the Jacquard calculation model ...
openaire   +1 more source

Migration of Deep Convection Center in Subpolar North Atlantic Around 6 ka Suggested by a Dinocyst Proxy of Mixed Layer Depth

Paleoceanography and Paleoclimatology, Volume 40, Issue 6, June 2025.
Abstract This study explores the relationship between dinoflagellate cyst (dinocyst) assemblages and the mixed layer depth (MLD) using canonical correspondence analyses. Our results suggest that wintertime deepening of MLD, in response to deep convection events, can influence dinocyst assemblages and especially the relative abundance of ...
Xiner Wu, Anne de Vernal, Estelle Allan
wiley   +1 more source