Results 51 to 60 of about 1,776,549 (292)

Contrasting characteristics observed between the early and late Cretaceous periods: Evidences from geochemical and isotopic studies of clastic rocks from the Tethys Himalaya, India

Journal of Asian Earth Sciences: X
This study uses a multi-proxy approach on Cretaceous shales (consisting of early Cretaceous Giumal shale and late Cretaceous Chikkim shale of Lagudarsi Group) from the Spiti region of the Indian Tethys Himalaya to assess paleo-weathering, redox ...
Heena Khan, Javid A. Ganai, Shaik A. Rashid, Nurul Absar   +3 more
doaj   +1 more source

A mid‐Cretaceous monocot flower from the Dakota Sandstone of Kansas and its potential implications for the fossil record of palms

American Journal of Botany, EarlyView.
Abstract Premise Although the megafossil flora of the upper Albian–lower Cenomanian Dakota Formation in Kansas is well known for angiosperms, monocots have not been reported previously. Methods A mesofossil flower was discovered by X‐ray analysis of a specimen collected more than a century ago from the Dakota Sandstone of central Kansas.
Bruce H. Tiffney, Walter S. Judd, William J. Baker, John Dransfield, Steven R. Manchester   +4 more
wiley   +1 more source

Tidal-influenced transgression processes in late cretaceous Termit Basin, Niger

Frontiers in Earth Science
Tidal characteristics observed in sediment cores serve as significant indicators of marine paleo-environments. In order to comprehend the sedimentary processes taking place in the Termit Basin and its connections with the New Tethys and the southern ...
ShengQiang Yuan, Chengqian Yu, Xingyang Zhang, Guanghua Zhai, Ronald J. Steel, Si Chen, Hairong Wang, Hong Jiang, Yifan Song, Jinyan Song   +9 more
doaj   +1 more source

Onset of an Aptian carbonate platform overlying a Middle-Late Jurassic radiolaritic-ophiolithic mélange in the Mirdita Zone of Albania

Geologia Croatica, 2012
Late Jurassic and Early Cretaceous carbonate sediments of different age and facies, form the post-emplacement settings on top of the Mirdita Ophiolite Zone in northern Albania.
Felix Schlagintweit, Hans-Jürgen Gawlick, Richard Lein, Sigrid Missoni, Lirim Hoxha   +4 more
doaj   +1 more source

Therian Femora from the Late Cretaceous of Uzbekistan [PDF]

Acta Palaeontologica Polonica, 2012
Femora referable to metatherians and eutherians recovered from the Bissekty Formation, Dzharakuduk, Kyzylkum Desert, Uzbekistan (90 Mya), are described. Fourteen isolated specimens were sorted based on size and morphology into groups that likely correspond to the species level or higher.
Chester, Stephen G.B., Sargis, Eric J., Szalay, Frederick S., Archibald, J. David, Averianov, Alexander O.   +4 more
openaire   +2 more sources

An osteohistological analysis of Triceratops (Ornithischia: Ceratopsidae) cranial ornamentation

The Anatomical Record, EarlyView.
Abstract Ceratopsids are among the most distinctive and well known extinct Cretaceous vertebrates, yet many details regarding the growth and composition of their cranial features are still not fully anatomically described or understood. In particular, striking cranial adornments such as the postorbital horns and parietal‐squamosal frill of Triceratops ...
Kyle D. Obuszewski, N. Adam Smith, Guinevere Rose Brown   +2 more
wiley   +1 more source

Geochronology and geochemistry of the Late Jurassic-Early Cretaceous Sangxiu Formation volcanic rocks of the Chegu region, Southern Tibet

Frontiers in Earth Science, 2023
The evolution patterns of the Neo-Tethys Himalayas have been a major topic of research, particularly in the Neo-Tethys Ocean. The geological field investigations were conducted in the Late Jurassic-Early Cretaceous Sangxiu Formation in the Tsomei Longzi ...
Feng Wu, Lixin Wang, Lixin Wang, Zhitao Huo, Jia Liao, Yao Tang, Tao Yang, Xin Li, Shijie Wang, Hongji Xiao, Binhua Cao, Binhua Cao   +11 more
doaj   +1 more source

Nasal soft‐tissue anatomy of Triceratops and other horned dinosaurs

The Anatomical Record, EarlyView.
Abstract Although ceratopsid dinosaurs possess a characteristically hypertrophied narial region, soft‐tissue anatomy associated with such a skeletal structure and their biological significance remain poorly understood. The present study provides the first comprehensive hypothesis on the soft‐tissue anatomy in the ceratopsid rostrum based on the Extant ...
Seishiro Tada, Takanobu Tsuihiji, Hiroki Ishikawa, Noriyuki Wakimizu, Soichiro Kawabe, Kodai Sakane   +5 more
wiley   +1 more source

PALYNOLOGY EVIDENCES OF HITHERTO UNRECOGNISED JURASSIC SEDIMENTATION IN RAJMAHAL BASIN, INDIA

Rivista Italiana di Paleontologia e Stratigrafia, 2004
In Rajmahal Basin the Upper Gondwana (Mesozoic) sequences are represented by the Dubrajpur and Rajmahal Formations. Palynologically, the Dubrajpur Formation is shown to be a time transgressive unit spanning from Early Triassic to Early Cretaceous. Out of
ARCHANA TRIPATHI
doaj   +1 more source

Morphological and biomechanical disparity of crocodile-line archosaurs following the end-Triassic extinction [PDF]

, 2013
Mesozoic crurotarsans exhibited diverse morphologies and feeding modes, representing considerable ecological diversity, yet macroevolutionary patterns remain unexplored.
Anderson, Philip S. L., Anderson, P S L, Rayfield, Emily J, Pierce, S E, Rayfield, E J, Stubbs, Thomas L, Pierce, Stephanie, E., Stubbs, T L   +7 more
core   +1 more source