Results 21 to 30 of about 71,903 (304)

First record of chimaeroid fish Ischyodus from the Upper Jurassic of southwestern Gondwana [PDF]

open access: yesActa Palaeontologica Polonica, 2021
This study presents two specimens of Chimaeriformes from Upper Jurassic strata of central Chile. The material was recovered from Tithonian levels of the Baños del Flaco Formation and includes two different individuals, one preserving two articulated ...
Rodrigo A. Otero   +5 more
doaj   +1 more source

Middle – Late Jurassic (Late Bathonian – Tithonian) Palynomorphs

open access: yesJournal of Micropalaeontology, 1985
Abstract. INTRODUCTIONJurassic palynomorph assemblages have been recovered in numerous wells in northeast Libya. Jurassic rocks reflect changing sedimentary environments which have greatly influenced the composition of the palynological assemblages.In the northernmost area, Jurassic sediments unconformably overlie the Palaeozoic or Triassic and show a ...
Thusu, B., Vigran, J. O.
openaire   +2 more sources

Analysis of the Importance of Extension in Accounting for the Post-Carboniferous Subsidence of the North Sea Basin [PDF]

open access: yes, 1986
Post Carboniferous sedimentary deposition in the Central North Sea basins can be separated into three major periods: Permian, Triassic and mid-Jurassic through present.
Hellinger, Steven J.   +2 more
core   +1 more source

Neotethyan Ankara Melange, central Turkey: Formation by accretion of seamounts and supra-subduction zone ophiolites in an oceanic fore-arc setting

open access: yesJournal of Asian Earth Sciences: X, 2023
The Neotethyan Ankara Melange is a global reference for oceanic accretionary processes preserved in a collisional orogen. Here we show, based on eight representative outcrops around Ankara, that the melange encompasses stratigraphically coherent volcanic-
Alastair H.F. Robertson   +4 more
doaj   +1 more source

The thermal history of the Western Irish onshore [PDF]

open access: yes, 2014
We present here a low-temperature thermochronological study that combines the apatite fission-track and (U + Th)/He dating methods with a pseudo-vertical sampling approach to generate continuous and well-constrained temperature–time histories from the ...
Chew, David   +2 more
core   +2 more sources

Trans-border (north-east Serbia/north-west Bulgaria) correlations of the Jurassic lithostratigraphic units [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2011
Herein, correlations of the Jurassic sediments from NE Serbia with those of NW Bulgaria are made. The following Jurassic palaeogeographic units: the Eastern Getic, the Infra-Getic and the Moesian Platform are included in the study.
Tchoumatchenco Platon   +4 more
doaj   +1 more source

Tracking Late Jurassic ornithopods in the Lusitanian Basin of Portugal: Ichnotaxonomic implications [PDF]

open access: yesActa Palaeontologica Polonica, 2020
The Sociedade de História Natural in Torres Vedras, Portugal houses an extensive collection of as yet undescribed dinosaur tracks with ornithopod affinities.
Diego Castanera   +4 more
doaj   +1 more source

Ornithischian dinosaurs in Southeast Asia: a review with palaeobiogeographic implications [PDF]

open access: yesFossil Record, 2023
Ornithischian dinosaurs have been discovered in Thailand, Laos, and Malaysia. These bird-hipped herbivores remain relatively rare by comparison with saurischian dinosaurs.
Sita Manitkoon   +4 more
doaj   +3 more sources

Provenance history of a Late Triassic-Jurassic Gondwana margin forearc basin, Murihiku Terrane, North Island, New Zealand: petrographic and geochemical constraints [PDF]

open access: yes, 2004
The Murihiku Terrane in the North Island was a forearc basin adjacent to a volcanic arc along the eastern margin of Gondwana during the Mesozoic. The rocks that infill the basin are mainly volcaniclastic sandstones and mudstones, often turbiditic, with ...
Briggs, Roger M.   +2 more
core   +2 more sources

Sauropodomorph evolution across the Triassic–Jurassic boundary: body size, locomotion, and their influence on morphological disparity

open access: yesScientific Reports, 2021
Sauropodomorph dinosaurs were the dominant medium to large-sized herbivores of most Mesozoic continental ecosystems, being characterized by their long necks and reaching a size unparalleled by other terrestrial animals (> 60 tonnes).
Cecilia Apaldetti   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy