Results 161 to 170 of about 105,245 (213)

Strontium isotope proxy of sedimentological records reveals uplift and erosion in the Southeastern Neo-Tethys ocean during the late Cretaceous. [PDF]

Sci Rep
Navidtalab A, Mehrabi H, Shafaii Moghadam H, Rahimpour-Bonab H.   +3 more
europepmc   +1 more source

7 Late Jurassic – Early Cretaceous

Roel M. C. H. Verreussel, Renaud Bouroullec, Alexander J. P. Houben, Dirk K. Munsterman   +3 more
openaire   +1 more source

Updated cranial and mandibular description of the Late Cretaceous (Maastrichtian) baenid turtle Saxochelys gilberti based on micro-computed tomography scans and new information on the holotype-shell association. [PDF]

Swiss J Palaeontol
Spicher GE, Lyson TR, Evers SW.
europepmc   +1 more source

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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, Charles L. Drake, Joseph D. Devine   +3 more
exaly   +4 more sources

Cosmopolitanism among Gondwanan Late Cretaceous mammals

Nature, 1997
Consistent with geophysical evidence for the breaking up of Pangaea, it has been hypothesized that Cretaceous vertebrates on progressively isolated landmasses exhibit generally increasing levels of provincialism1,2,3, with distinctly heightened endemism occurring at the beginning of the Late Cretaceous4.
David W. Krause, G. V. R. Prasad, Wighart von Koenigswald, Ashok Sahni, Frederick E. Grine   +4 more
openaire   +3 more sources

Late Cretaceous Reversal Sequence

Geology, 1975
A sequence of 14 reversals (that is, seven periods of reversed polarity) is observed in Maestrichtian sedimentary rocks from the Mendez Shale of Mexico and in cores from Deep Sea Drilling Project Sites 207A and 208, Lord Howe Rise. Data from a paleomagnetic investigation indicate that (1) a brief interval of frequent field reversals occurred at the ...
B. Keating, C. E. Helsley, E. A. Pessagno   +2 more
openaire   +1 more source

Migration of a Late Cretaceous fish

Nature, 2003
Late Cretaceous sediments from the Western Interior of North America yield exceptionally well preserved fossils that serve as proxies for the rapidly changing climate preceding the Cretaceous/Tertiary boundary (about 67-65 Myr ago). Here we reconstruct the ontogenetic history of a Maastrichtian-age fish, Vorhisia vulpes, by using the carbon, oxygen and
Scott J, Carpenter, J Mark, Erickson, F D, Holland   +2 more
openaire   +2 more sources

Late Cretaceous–Paleocene Depsits

2020
Preceding studies divided the Late Cretaceous deposits in the Cyrenaica Basin into two parts: the first part was deposited on the coast (Al Hilal and Al Athrun formations) and the second part in the inland (Qasr Al Abid, Al Baniyah, Al Majahir and Wadi Dukhan formations).
Osama Rahil Shaltami, Fares F. Fares, Hwedi Errishi, Farag M. EL Oshebi   +3 more
openaire   +1 more source

Baja California: Late Cretaceous Dinosaurs

Science, 1967
Late Cretaceous dinosaurs have been discovered along the Pacific margin of Baja California. The presence of Hypacrosaurus sp. is suggestive of correlation with the Upper Edmonton Formation, Alberta. Dissimilarities between the Baja California fauna and those from contemporary units along the eastern trend of the ...
openaire   +2 more sources

Late Cretaceous chrysomonad cysts

Palaeogeography, Palaeoclimatology, Palaeoecology, 1972
Abstract An abundant and diverse chrysomonad-cyst flora is present in the Marca Shale Member of the Moreno Formation of California. Associated with the siliceous cysts are diatoms, silicoflagellates, radiolarians, and, rarely, Foraminifera. Five preliminary biostratigraphic zones, based on variations in the kinds and quantities of cysts present, are ...
openaire   +1 more source