Results 11 to 20 of about 144,481 (328)

A new mamenchisaurid from the Upper Jurassic Suining Formation of the Sichuan Basin in China and its implication on sauropod gigantism [PDF]

open access: yesScientific Reports
The Sichuan Basin has yielded abundant sauropod dinosaurs from the Middle-Late Jurassic, and Mamenchisauridae had predominated the dinosaur faunae during the Late Jurassic in the Sichuan Basin.
Xuefang Wei   +12 more
doaj   +2 more sources

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 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.
Richard E. Ernst   +8 more
wiley  

+11 more sources

Redescription of the type specimens for the Late Jurassic rhynchocephalian Opisthias rarus and a new specimen of Theretairus antiquus from Quarry 9, Morrison Formation, Wyoming, USA [PDF]

open access: yesActa Palaeontologica Polonica, 2022
We reexamine and redescribe the type specimens and other associated material of the Late Jurassic rhynchocephalian Opisthias rarus, from Quarry 9 of the Morrison Formation.
JORGE A. HERRERA-FLORES   +2 more
doaj   +1 more source

Overview of the Les Isnards Ammonite Slab Geoheritage Site (Digne-les-Bains, Southeastern France) [PDF]

open access: yesGeoconservation Research, 2021
The Digne-les-Bains ammonite slab is one of the most impressive geosites of the UNESCO Global Geopark of Haute-Provence and Réserve Naturelle Nationale Géologique de Haute-Provence.
Didier Bert, Jean-Simon Pagès
doaj   +1 more source

A Geochemistry study of the Sargelu Formation (Middle Jurassic) in terms of original mineralogy and palaeotemperature in the Lorestan area [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2022
The carbonate Sargelu Formation (Middle Jurassic) in the Lorestan area mainly consists of black calcareous shales and thin- to thick-bedded limestones with remarkable organic material. Integrated binary diagrams of trace elements and stable isotopes such
Mahmoud Sharafi   +4 more
doaj   +1 more source

A relict Triassic brittle star (Echinodermata, Ophiuroidea) in Lower Jurassic strata of Asturias, north-west Spain

open access: yesSwiss Journal of Palaeontology, 2023
Ophiuroids, also known as brittle stars, are an important component of modern marine benthos, yet their fossil record is still poorly understood. Here, we describe new finds of ophiuroids from the upper Sinemurian (Lower Jurassic) of Asturias, north-west
Ben Thuy   +2 more
doaj   +1 more source

The enamel microstructure of Manidens condorensis: New hypotheses on the ancestral state and evolution of enamel in Ornithischia [PDF]

open access: yesActa Palaeontologica Polonica, 2020
Previous studies on enamel microstructure in Ornithischia have focused on derived lineages of this clade based on species from the northern hemisphere.
Marcos G. Becerra, Diego Pol
doaj   +1 more source

Establishing the Lower-Middle Jurassic Boundary in the UNESCO Global Geopark Molina & Alto Tajo (Central Spain) [PDF]

open access: yesGeoconservation Research, 2021
The Global Boundary Stratotype Section and Point (GSSP) of the Aalenian Stage (base of the Middle Jurassic), was established in Fuentelsaz (Central Spain) by the International Commission on Stratigraphy (ICS) of the International Union of Geological ...
Antonio Goy   +2 more
doaj   +1 more source

Deep-sea Ordovician lingulide brachiopods and their associated burrows suggest an early colonization of proximal turbidite systems

open access: yesScientific Reports, 2023
Trace fossils from Ordovician deep-marine environments are typically produced by a shallow endobenthos adapted to live under conditions of food scarcity by means of specialized grazing, farming, and trapping strategies, preserved in low-energy ...
Maximiliano Paz   +7 more
doaj   +1 more source

Reservoir characteristics and controlling factors of physical properties of Jurassic Toutunhe Formation in the eastern segment of the southern margin of Junggar Basin

open access: yesShiyou shiyan dizhi, 2022
The lower assemblage (from Jurassic to Cretaceous) on the southern margin of Junggar Basin is rich in oil and gas resources, and the Jurassic Toutunhe Formation in the eastern segment is an important horizon for reservoir development.
Ke LIU   +7 more
doaj   +1 more source

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