Results 11 to 20 of about 238,060 (300)

Dietary palaeoecology of an Early Cretaceous armoured dinosaur (Ornithischia; Nodosauridae) based on floral analysis of stomach contents [PDF]

Royal Society Open Science, 2020
The exceptionally well-preserved holotype of the armoured dinosaur Borealopelta markmitchelli (Ornithischia; Nodosauridae) from the Early Cretaceous (Clearwater Formation) of northern Alberta preserves a distinct mass within the abdominal cavity ...
Caleb M. Brown, David R. Greenwood, Jessica E. Kalyniuk, Dennis R. Braman, Donald M. Henderson, Cathy L. Greenwood, James F. Basinger   +6 more
doaj   +1 more source

An Upper Cretaceous ichthyodectiform fish from Kyushu, Japan [PDF]

Research & Knowledge, 2017
Ichthyodectiform fishes are an exclusively extinct basal teleost clade, with a temporal range from the Middle Jurassic (Bathonian) to Upper Cretaceous (Maastrichtian).
Yoshitaka Yabumoto, Paulo M. Brito, Koji Hirose   +2 more
doaj   +1 more source

Skull of a dromaeosaurid dinosaur Shri devi from the Upper Cretaceous of the Gobi Desert suggests convergence to the North American forms

Acta Palaeontologica Polonica, 2023
Numerous dromaeosaurid taxa recovered from the Upper Cretaceous strata of the Gobi Desert raise questions over niche partitioning among closely related species.
ŁUKASZ CZEPIŃSKI
doaj   +1 more source

Iridescent plumage in a juvenile dromaeosaurid theropod dinosaur

Acta Palaeontologica Polonica, 2023
Colour reconstructions have provided new insights into the lives of dinosaurs and other extinct animals, by predicting colouration patterns from fossilised pigment-bearing organelles called melanosomes.
ANGUS D. CROUDACE, CAIZHI SHEN, JUNCHANG LÜ, STEPHEN L. BRUSATTE, JAKOB VINTHER   +4 more
doaj   +1 more source

Research on rock mechanics parameters of the Jurassic-Cretaceous reservoir in the Sikeshu sag, Junggar Basin, China

Dizhi lixue xuebao, 2022
Structural analysis and reservoir evaluation has become increasingly important as petroleum exploration keeps making breakthroughs in the foreland of the southern Junggar Basin. However, the research on rock mechanical parameters which is closely related
ZHAO Jinyong, JI Dongsheng, WU Jian, PANG Zhichao, WU Lin   +4 more
doaj   +1 more source

New Geochronological Age Constraint and Chemostratigraphy for Aptian Lacustrine Strata, Cedar Mountain Formation, Utah

Geochemistry, Geophysics, Geosystems, 2023
The Early Cretaceous is an important time of transition in Earth history, marked by a succession of oceanic anoxic events and carbon cycle perturbations that drove changes on land and in the ocean.
Marina B. Suarez, Aisha Al Suwaidi, Elizabeth H. Montgomery, James I. Kirkland, Joe Andrew, Noah Mclean, Andreas Möller, Gregory Ludvigson, Celina A. Suarez   +8 more
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Heavy clastic minerals as an indicator of geodynamic settings of accumulation and provenance of cretaceous sediments of the West Sakhalin terrane

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2021
The article discusses the results of studying heavy clastic minerals from the Cretaceous sandy rocks of the West Sakhalin Terrane, and also presents their paleogeodynamic interpretation.
Малиновский А.И.
doaj   +1 more source

Identifying the oldest larva of a myrmeleontiformian lacewing—a morphometric approach [PDF]

Acta Palaeontologica Polonica, 2020
Neuroptera is one of the smaller ingroups of Holometabola, the ingroup of Insecta characterised by “complete” metamorphosis. Neuroptera comprises about 6000 species in the modern fauna, but appears to have been more diverse in the past.
Andrés F. Herrera-Flórez, Florian Braig, Carolin Haug, Christian Neumann, Jörg Wunderlich, Marie K. Hörnig, Joachim T. Haug   +6 more
doaj   +1 more source

New Late Cretaceous zhelestid mammal from the Bayanshiree Formation, Mongolia [PDF]

Acta Palaeontologica Polonica
Numerous exquisitely preserved mammal fossils unearthed from Upper Cretaceous strata in the Gobi Desert of Mongolia have played a key role in understanding Mesozoic mammalian evolution.
TSUKASA OKOSHI, RYUJI TAKASAKI, KENTARO CHIBA, MASAHITO NATORI, MOTOTAKA SANEYOSHI, AKIO TAKAHASHI, SHOTA KODAIRA, SHOJI HAYASHI, SHINOBU ISHIGAKI, BUUVEI MAINBAYAR, KHISHIGJAV TSOGTBAATAR   +10 more
doaj   +1 more source

Late Cenomanian-Turonian isotopic stratigraphy in the chalk of the Paris Basin (France): a reference section between the Tethyan and Boreal realms

BSGF - Earth Sciences Bulletin, 2021
A chemostratigraphic study (δ13C and δ18O) of the Late Cenomanian and Turonian chalk succession from the “Craie 701” Poigny borehole (near Provins in the Paris Basin, France) provides new high-resolution stable carbon and oxygen isotope data. Correlation
Le Callonnec Laurence, Briard Justine, Boulila Slah, Galbrun Bruno   +3 more
doaj   +1 more source