Results 11 to 20 of about 91,036 (273)

The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces

open access: yesGeophysical Monograph Series, Page 229-246., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson   +2 more
wiley  

+6 more sources

Geochemistry, origin and anatexis temperature of monzogranite formation in Mount Khalaj (Mashhad, Iran)

open access: yesJournal of Economic Geology, 2021
Introduction Granitoids are the main rock units in the continental crust. Study of granitoids reveals significant information on tectonic mantle and upper crust.
Ramin Samadi   +2 more
doaj   +1 more source

Diversity of chondrostean fish Coccolepis from the Late Jurassic Solnhofen Archipelago, Southern Germany [PDF]

open access: yesActa Palaeontologica Polonica, 2021
Late Jurassic marine vertebrates are extraordinarily well preserved in several Plattenkalk Lagerstätten in central Europe. Among them, the Solnhofen Archipelago has yielded the very rare fish Coccolepis bucklandi, which was the first fossil ...
ADRIANA LÓPEZ-ARBARELLO, MARTIN EBERT
doaj   +1 more source

Two-seeded cones of probable gnetalean affinity from the Morrison Formation (Late Jurassic) of Utah and Colorado, USA

open access: yesActa Palaeobotanica, 2022
Three dimensional calcitic casts of a two-seeded compound cone are described from the Upper Jurassic Brushy Basin Member of the Morrison Formation based on specimens from Colorado and Utah. Cones of Bassitheca hoodiorum gen. et sp. nov.
Steven R. Manchester   +4 more
doaj   +1 more source

Evolution and identity of synapsid carpal bones [PDF]

open access: yesActa Palaeontologica Polonica, 2020
To date there is little information on carpal bone homology in late Palaeozoic and Mesozoic Synapsida. Crucial to the understanding of homology in synapsid carpal elements is the fact that different nomenclatures are used for the carpals of non ...
Susanna Kümmell   +3 more
doaj   +1 more source

Perinatal specimens of Maiasaura from the Upper Cretaceous of Montana (USA): insights into the early ontogeny of saurolophine hadrosaurid dinosaurs [PDF]

open access: yesPeerJ, 2018
Perinatal specimens of hadrosaurids discovered in the late 1970’s by field crews from Princeton University were significant in providing evidence of the early ontogenetic stages in North American dinosaurs.
Albert Prieto-Marquez   +1 more
doaj   +2 more sources

Origen i reconstrucció paleoambiental dels jaciments d'icnites de Titanosaure de Fumanya

open access: yesCiències, 2016
Els jaciments de Fumanya (Berguedà) han estat tristament notícia degut a l’esllavissada del passat 10 de maig de 2016, que ha suposat una gran pèrdua patrimonial, científica i turística.
Josep Marmi
doaj   +1 more source

An early Eocene pan-gekkotan from France could represent an extra squamate group that survived the K/Pg extinction [PDF]

open access: yesActa Palaeontologica Polonica, 2023
In this paper we describe a new lizard from the early Eocene of the Cos locality in the Quercy region (near the Caylus village, Southwest France). The age of the Cos deposit has been proposed as the MP 10–11 interval, close to the transition of the ...
ANDREJ ČERŇANSKÝ   +4 more
doaj   +1 more source

A new rhynchocephalian from the late jurassic of Germany with a dentition that is unique amongst tetrapods. [PDF]

open access: yes, 2012
Rhynchocephalians, the sister group of squamates (lizards and snakes), are only represented by the single genus Sphenodon today. This taxon is often considered to represent a very conservative lineage.
A Günther   +50 more
core   +2 more sources

Late Paleozoic-Mesozoic structural style, deformation sequence, and formation process and mechanism of the checkboard structure in the eastern Junggar Basin

open access: yesDizhi lixue xuebao, 2023
The eastern Junggar has experienced multistage intra-continental deformations since the late Paleozoic. The checkerboard structure is one of the most notable features of the Junggar Basin, especially the eastern Junggar Basin, and its formation and ...
REN Xincheng   +5 more
doaj   +1 more source

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