Results 281 to 290 of about 183,367 (338)

The Cretaceous Period

2020
The breakup of the former Pangea supercontinent culminated in the modern drifting continents. Increased rifting caused the establishment of the Atlantic Ocean in the middle Jurassic and significant widening in Cretaceous. An explosion of calcareous nannoplankton and foraminifers in the warm seas created massive chalk deposits.
A. S. Gale, J. Mutterlose, S. Batenburg, F. M. Gradstein, F. P. Agterberg, J. G. Ogg, M. R. Petrizzo   +6 more
openaire   +5 more sources

Cretaceous eustasy revisited

Global and Planetary Change, 2014
B. Haq
exaly   +2 more sources

Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and Cenozoic

, 1995
Recently reported radioisotopic dates and magnetic anomaly spacings have made it evident that modification is required for the age calibrations for the geomagnetic polarity timescale of Cande and Kent (1992) at the Cretaceous/Paleogene boundary and in ...
S. Cande, D. Kent
semanticscholar   +1 more source

Cretaceous

2018
The Cretaceous evolution of sedimentary basins in Central Europe was influenced by the interplay of two main processes: plate tectonics and eustatic sea-level change. Global plate-tectonic reconfiguration resulted in the widening of the Central Atlantic, the opening of the Bay of Biscay, and the opening of the South Atlantic Ocean causing a counter ...
Voigt, S., Wagreich, M., Surlyk, Finn, Walaszczyk, I., Ulicny, D., Cech, S., Voigt, T., Wiese, F., Wilmsen, M., Niebuhr, B., Reich, M., Funk, H., Michalik, J., Jagt, J.W.M., Felder, P.J., Schulp, A.S.   +15 more
openaire   +4 more sources

Late-surviving stem mammal links the lowermost Cretaceous of North America and Gondwana

Nature, 2018
Adam K Huttenlocker, David M Grossnickle, Julia A Schultz   +2 more
exaly   +2 more sources

The Cretaceous-Tertiary Transition [PDF]

Science, 1983
The fossil sequences from cores across the Cretaceous-Tertiary boundary show a range of transition times and transition time intervals depending on the fossil indicators and the location of the site. These variations, together with the pattern of iridium distribution with depth at some sites, differences in total amounts of iridium, variations in noble
Charles B. Officer, Charles L. Drake
openaire   +2 more sources

Continental stretching: An explanation of the Post-Mid-Cretaceous subsidence of the central North Sea Basin

, 1980
The North Sea is a major continental basin filled with early Paleozoic to Recent sediments. Though graben formation started in the Triassic, the last major period of extension occurred between the Middle Jurassic and the mid-Cretaceous.
J. Sclater, P. A. F. Christie
semanticscholar   +1 more source

Late Cretaceous and paroxysmal Cretaceous/Tertiary extinctions

Nature, 1987
The various geological signatures at Cretaceous/ Tertiary time including iridium and other associated elements, microspherules, and shock deformation features are compatible with the suggestion that the transition is marked by a period of intense volcanism.
Charles B. Officer, Anthony Hallam, Joseph D. Devine, Charles L. Drake   +3 more
openaire   +2 more sources

Cretaceous Dinosaur Extinction

Evolution, 1968
The reign of dinosaurs, dominant on land for about 150 million years, terminated at the close of the Cretaceous. They did not all disappear at precisely the same moment, but from a peak of about 120 genera near the middle of the period, dwindled in numbers down to the end of Cretaceous at which time a large number of genera became extinct (Newell, 1962;
Harry P. Bailey, Daniel I. Axelrod
openaire   +2 more sources

Response—Cretaceous Extinctions

Science, 2010
The Letters by Archibald et al. , Keller et al. , and Courtillot and Fluteau question our conclusion that the Cretaceous-Paleogene mass extinction was caused by the asteroid impact at Chicxulub.
Schulte, Peter, Alegret, Laia, Arenillas, Ignacio, A. Arz, José, J. Barton, Penny, R. Bown, Paul, J. Bralower, Timothy, L. Christeson, Gail, Claeys, Philippe, S. Cockell, Charles, S. Collins, Gareth, Deutsch, Alexander, J. Goldin, Tamara, Goto, Kazuhisa, M. Grajales-Nishimura, José, A. F. Grieve, Richard, P. S. Gulick, Sean, R. Johnson, Kirk, Kiessling, Wolfgang, Koeberl, Christian, A. Kring, David, G. Macleod, Kenneth, Matsui, Takafumi, Melosh, Jay, Montanari, Alessandro, V. Morgan, Joanna, R. Neal, Clive, D. Norris, Richard, Pierazzo, Elisabetta, Ravizza, Greg, Rebolledo-Vieyra, Mario, Uwe Reimold, Wolf, Robin, Eric, Salge, Tobias, P. Speijer, Robert, R. Sweet, Arthur, Urrutia-Fucugauchi, Jaime, Vajda, Vivi, T. Whalen, Michael, S. Willumsen, Pi   +39 more
openaire   +3 more sources