Results 111 to 120 of about 16,557 (355)

Matrix Corrected SIMS In Situ Oxygen Isotope Analyses of Marine Shell Aragonite for High Resolution Seawater Temperature Reconstructions

Geochemistry, Geophysics, Geosystems
Marine shells incorporate oxygen isotope signatures during growth, creating valuable records of seawater temperature and marine oxygen isotopic compositions.
Oliver M. Medd, Laura M. Otter, Ian S. Williams, Richard A. Stern, Michael W. Förster, Stephen M. Eggins, Laura Rodriguez‐Sanz, Nerilie J. Abram, Miaohong He, Michael J. Ellwood, Jessica A. Hargreaves, Stewart J. Fallon, Brett M. Knowles   +12 more
doaj   +1 more source

The Magnitude of Surface Ocean Acidification and Carbon Release During Eocene Thermal Maximum 2 (ETM-2) and the Paleocene-Eocene Thermal Maximum (PETM) [PDF]

, 2020
Harper, DT, Haynes, LL, Honisch, B, Shaffer, G, Thomas, E, Zachos, JC, Zeebe, RE   +6 more
core   +1 more source

Palaeoenvironmental evolution of the Baltic Sea basin during the Last Interglacial (Eemian, Mikulino stages): a review

Boreas, EarlyView.
This review presents an investigation of the evolution of the Baltic Sea basin and its connections through the Eemian Stage, based upon sequences of marine and associated deposits from the White Sea to the Southwest Baltic, via the Karelian channel. Pollen analyses, foraminiferal and ostracod analyses provide the evolution of relative sea‐level change,
Philip L. Gibbard, Karen L. Knudsen
wiley   +1 more source

Anomalously cool clumped isotope temperatures in tropical lagoon carbonates

The Depositional Record
Carbonate clumped isotopes are a powerful tool for paleoclimate reconstruction due to the ability to reconstruct past changes in both temperature and precipitation‐evaporation balance.
D. A. Wyman‐Feravich, M. Ingalls, J. L. Conroy, R. He, S. Lusk   +4 more
doaj   +1 more source

Paleo-humidity changes in a tropical Aptian continental to transitional system: a case study from the Araripe Basin, Northeastern Brazil [PDF]

Brazilian Journal of Geology
Although many paleogeographic reconstructions depict equatorial Brazil as being predominantly arid during the Aptian, studies using palynomorphs suggest climatic fluctuations between humid and arid phases.
Marcos Antonio Batista dos Santos Filho, Marcelo Augusto De Lira Mota, Marlone Heliara Hünnig Bom, Lilian Maia Leandro, Daiane Ceolin, Marcelo de Araujo Carvalho, Guilherme Krahl, Jorge Villegas-Martín, Gerson Fauth, Mario Luis Assine, Francisco Henrique de Oliveira Lima   +10 more
doaj   +1 more source

Unravelling the evolution of the Frébouge polygenetic cone in Val Ferret (Mont Blanc Massif)

Boreas, EarlyView.
Proglacial settings in the Alps are typically polygenetic, often characterized by a complex and discontinuous interplay between glacial, fluvial and gravitational processes. These processes yield high volumes of sediments, which usually exceed their transportation capacity.
Catharina Dieleman, Philip Deline, Susan Ivy Ochs, Patricia Hug, Jordan Aaron, Marcus  Christl, Naki Akçar   +6 more
wiley   +1 more source

Stratigraphic evidence for modern‐like glacier extents in south‐central Alaska within the last glacial period (MIS 3)

Boreas, EarlyView.
The last (Wisconsinan) glacial period was punctuated in North America by two glacial maxima, known as the Early and Late Wisconsinan glaciations. In Alaska, these maxima and their subsequent retreats have been the object of dating efforts to reconstruct local climatic events and compare them to global trends.
Bruno Belotti, Elizabeth J. Cassel, Timothy C. Bartholomaus, Michael G. Loso, Michael S. Christoffersen, John W. Holt   +5 more
wiley   +1 more source

A Reassessment of the Chronostratigraphy of Late Miocene C-3-C-4 Transitions [PDF]

, 2020
Curry W. B., Feakins S. J., Gradstein F. M., Hodell D. A., Neupane P. C., Osborne C. P., Pandey D. K., Party T. S., Rao A. R., Routledge C. M., Ruddiman W., Sangode S. J., Schneider D. A., Shackleton N. J., Singh S.   +14 more
core   +2 more sources

Fossil bears break free from inhibitory cascade constraints at least twice (Ursus minimus and Ursus deningeri) caused by dietary adaptations

Boreas, EarlyView.
Bears deviate from the inhibitory cascade model (ICM) during molar size evolution, with two significant deviations linked to changes in diet: Ursus minimus and Ursus deningeri. Many bears exhibit a ‘partial ICM’, highlighting the relationship between relative molar size, dietary adaptations and dental development across different species.
Anneke H. van Heteren, A. Stefanie Luft
wiley   +1 more source

Middle to Late Pleistocene landscape evolution and glacial dynamics in the Eastern Alps: the Gröbminger Mitterberg record, Austria

Boreas, EarlyView.
Glacial erosion during the Last Glacial Maximum (LGM) has removed much evidence of earlier glaciations and interglacials in the European Alps. At Gröbminger Mitterberg (GM), beneath a blanket of LGM till, a distinctive sediment archive preserves deposits predating the LGM.
Gerit E. U. Griesmeier, Daniel P. Le Heron, Christopher Lüthgens, Gustav Firla, Bernhard Salcher, Fabian Dremel, Jan‐Christoph Otto, Jürgen M. Reitner   +7 more
wiley   +1 more source