Results 121 to 130 of about 19,060 (240)

Comparative functional morphological study of the tarsal joint mobility in artiodactyls and perissodactyls in light of astragalar morphological differences

Journal of Anatomy, Volume 249, Issue 3, Page 587-603, September 2026.
This study investigated how variations in the shape of the astragalus affect tarsal joint behavior, using CT scans. In artiodactyls with a double‐pulley astragalus, the calcaneus shifted plantarly during plantarflexion. This suggests the movement increases hindlimb functional length and contributes to enhanced running speed.
Sei‐ichiro Takeda, Yoichi Masuda, Truong Son Nguyen, Hideki Endo   +3 more
wiley   +1 more source

The Paleogene basins of Sabah, East Malaysia

, 1995
The Paleogene basins of Sabah developed in two stages, represented by early and late Paleogene sediments, in association with NW-SE compressional deformation during the late Mesozoic and Middle Eocene.
Editor Geological Society of Malaysia
core  

Geophysical update of the diameter of the Zhamanshin impact structure, Kazakhstan

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2284-2302, September 2026.
Abstract The rim of the 0.9‐Ma‐old Zhamanshin impact crater in Kazakhstan is considered to be almost completely exposed via a series of hills surrounding a central flat area, indicating an apparent diameter of 14 km. This would make Zhamanshin the second largest impact crater of the Quaternary period. However, the overall geometry of these hills is not
Yoann Quesnel, Dilyara M. Kuzina, Jérôme Gattacceca, Minoru Uehara, Ayrat G. Kharisov, Dmitry D. Badyukov, Pierre Rochette   +6 more
wiley   +1 more source

Dinosaur extinction can explain continental facies shifts at the Cretaceous-Paleogene boundary

Communications Earth & Environment
Continental Cretaceous-Paleogene boundary sections are best known from North America, where they invariably exhibit a marked shift in sedimentary facies at or very near the boundary level.
Lucas N. Weaver, Thomas S. Tobin, Courtney J. Sprain, Paige K. Wilson Deibel, Vera A. Korasidis, Mónica R. Carvalho, Pim Kaskes, Isabel M. Fendley   +7 more
doaj   +1 more source

Iron Isotopes Reveal Fe Export Driven by Change of Tropical Weathering Regime

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Unraveling paleoenvironmental signals recorded in laterites is crucial for quantifying weathering‐driven elemental fluxes at the Earth's surface. New stable iron isotope data (δ56Fe), combined with (U‐Th)/He ages in Fe‐oxides from a ferruginous duricrust from French Guiana, reveal the response of Fe hosted in laterite to past changes in ...
Z. Fekiacova‐Castanet, B. Heller, D. Guinoiseau, J. Bouchez, A. Duvivier, S. Cornu, A. Guihou, C. Quantin, T. Allard, S. B. Riffel, P. Deschamps, C. Gautheron   +11 more
wiley   +1 more source

THE SOUTHERNMOST OCCURRENCE OF BRACHYCARCHARIAS (LAMNIFORMES, ODONTASPIDIDAE) FROM THE EOCENE OF ANTARCTICA PROVIDES NEW INFORMATION ABOUT THE PALEOBIOGEOGRAPHY AND PALEOBIOLOGY OF PALEOGENE SAND TIGER SHARKS [Elektronisk resurs]

, 2018
 The first record of one of the most common and widespread Paleogene selachians, the sand tiger shark Brachycarcharias, in the Ypresian strata of the La Meseta Formation, Seymour Island, Antarctica, is provided herein.
MARRAMÀ, GIUSEPPE,, Mörs, Thomas,, KRIWET, JÜRGEN,, ENGELBRECHT, ANDREA,, REGUERO, MARCELO A.,   +4 more
core  

Application of a novel schema for describing fossil fern foliage and investigating taxonomic and morphological change across the Cretaceous-Paleogene boundary in western North America. [PDF]

Am J Bot
Holian FB, Sessa EB, Barclay RS, Dunn RE, Gill JL, Johnson KR, Maccracken SA, Miller IM, Pittermann J, Currano ED.   +9 more
europepmc   +1 more source

New records of extinct Icacinaceae from Paleocene rainforests of northwestern South America. [PDF]

Am J Bot
Puente-Santos LM, Carvalho MR, Shirley E, Herrera F.   +3 more
europepmc   +1 more source

El Paleogen

, 1993
Structural setting, stratigraphic relationships, paleontolgical character and sedimentology of Paleogene deposits cropping out in Cabrera Islands are described. They correspond to sandy to silty limestones building up a transgressive-regressive cicle that correlates with s'Envestida Calcarenites Fm. defined in Mallorca Is.
openaire   +1 more source

Cenozoic igneous activity in northern China as a mechanism for Late Oligocene climate warming. [PDF]

Sci Rep
Tao Z, Lin D, Alves TM, Huang Y, Wu Z, Liu Y.   +5 more
europepmc   +1 more source