Results 131 to 140 of about 201,757 (374)
Aspects of the history, anatomy, taxonomy and palaeobiology of sauropod dinosaurs [PDF]
arXiv, 2013 Although the sauropod dinosaurs have been recognised for more than a hundred and sixty years, much remains to be discovered and understood about their functional anatomy and palaeobiology. Older taxa require revision and new taxa await description. The characteristic long necks of sauropods are mechanically perplexing and their evolution is obscure ...
arxiv
Spinel-Bearing Spherules Condensed from the Chicxulub Impact-Vapor Plume [PDF]
Geology 33: 293-296 (2005)Formation of the giant Chicxulub crater off Mexico's Yucatan Peninsula coincided with deposition of the global Ir-rich Cretaceous-Tertiary (K-T) stratigraphic boundary layer at ca. 65 Ma. The boundary is marked most sharply by abundant spherules containing unaltered grains of magnesioferrite spinel.
arxiv +1 more source
Lower Cretaceous Angiosperms [PDF]
Nature, 1910 IN the course of my work at the British Museum on Cretaceous plants, I have examined a number of more or less perfectly petrified “woods.” Such specimens have generally been classed together as “Gymnosperms,” so that they have received little attention from palaeobotanists. As I am undertaking an exhaustive study of the Cretaceous plants, the keeper of
openaire +3 more sources
Detrital events within pelagic deposits of the Umbria-Marche basin (Northern Apennines, Italy). Further evidence of Early Cretaceous tectonics [PDF]
, 2016 Re-sedimented deposits characterize different stratigraphical intervals in the pelagic successions of the Umbria-Marche-Sabina Domain (Central and Northern Apennines, Italy).
CIPRIANI, ANGELO +3 more
core +1 more source
The Depositional Record, EarlyView.This volume examines tidal sedimentary systems through 11 articles, spanning ancient and modern tidalites, technological advances and implications for human management. Highlighting contributions from Tidalites 2022 and beyond, it underscores tidalites' significance in sedimentology, environmental forecasting and energy transition, reflecting decades ...
Sergio G. Longhitano +2 more
wiley +1 more source
Pterosaur teeth from the Southern Neuquén Basin (Patagonia, Argentina): New insights on the reconstruction of ornithocheiriform dental anatomy [PDF]
Acta Palaeontologica PolonicaThe pterosaur fossil record of Argentina is increasing in recent times, both in the number of localities and their temporal range. The new materials are found in levels that span from the Late Triassic to the Late Cretaceous in age.
ALESSIO CIAFFI, FLAVIO BELLARDINI
doaj +1 more source
End-cretaceous cooling and mass extinction driven by a dark cloud encounter [PDF]
arXiv, 2016 We have identified iridium in an ~5 m-thick section of pelagic sediment cored in the deep sea floor at Site 886C, in addition to a distinct spike in iridium at the K-Pg boundary related to the Chicxulub asteroid impact. We distinguish the contribution of the extraterrestrial matter in the sediments from those of the terrestrial matter through a Co-Ir ...
arxiv
Valanginian to Barremian Benthic Foraminifera from ODP Site 766 (Leg 123, Indian Ocean) [PDF]
, 1995 A Valanginian to Barremian bathyal foraminiferal assemblage (118 taxa belonging to 51 genera) is documented from ODP Site 766, drilled near the foot of the Exmouth Plateau off northwest Australia.
Holbourn, A.E.L., Kaminski, M.A.
core +1 more source
The Depositional Record, EarlyView.With the aid of a chronologically well‐constrained stratigraphy, facies and sequence analyses were carried out on three drill‐cores obtained from estuarine macrotidal flats. The sequence analysis of the late Quaternary tidal deposits shows that four transgressions occurred in multi‐sequential order, whereas the intervening regressive phases were much ...
Serin Lim +4 more
wiley +1 more source
A well-preserved vertebra provides new insights into rebbachisaurid sauropod caudal anatomical and pneumatic features [PDF]
Acta Palaeontologica PolonicaRebbachisauridae is a clade of sauropod dinosaurs whose maximum diversification and abundance are known from the Cretaceous of South America. We describe an anterior caudal vertebra, MDPA-Pv 007, from the Upper Cretaceous of Argentine Patagonia, whose ...
GUILLERMO J. WINDHOLZ +4 more
doaj +1 more source