Results 41 to 50 of about 8,265,842 (328)

Fossil Collecting Codes of Conduct on the Jurassic Coast World Heritage Site - practical management connecting fossil collectors, land owners / managers, researchers and museums with the needs of the Site

Geoconservation Research
Fossil collecting along parts of the Dorset and East Devon Coast World Heritage Site is managed via codes of conduct. This paper provides an outline of their terms, an account of how they operate in practice, and a discussion on how best to manage such ...
Christopher Reedman, Phil Davidson, Jonathan Larwood, Sam Scriven, Joshua Smith, David Sole   +5 more
doaj   +1 more source

Reassessment of exploration directions of continental shale oil in Lower Jurassic Da'anzhai Member in northern Sichuan Basin

Shiyou shiyan dizhi
The Da'anzhai Member of the Lower Jurassic in northern Sichuan Basin is one of the major oil-bearing formations in the basin. In recent years, with the development of unconventional exploration theories, exploration efforts have shifted towards the shale
Liang XIONG, Xiaoxia DONG, Tong WANG, Limin WEI, Jiasui OUYANG, Baobao WANG, Shaoke FENG   +6 more
doaj   +1 more source

JURASSIC PALEONTOLOGICAL HERITAGE OF MURCIA (BETIC CORDILLERA, SOUTH-EASTERN SPAIN)

Rivista Italiana di Paleontologia e Stratigrafia, 2004
Jurassic rocks of the External and Internal Zones of the Betic Cordillera are widespread in the province of Murcia. Four areas are considered of special interest for stratigraphical and paleontological analysis: a) Sierra Quípar and b) Sierras Lúgar ...
GREGORIO ROMERO, JOSÉ SANDOVAL, JESÚS CARACUEL, MIGUEL ÁNGEL MANCHEÑO   +3 more
doaj   +1 more source

Uncertainties surrounding the oldest fossil record of diatoms

Scientific Reports, 2023
Molecular clocks estimate that diatom microalgae, one of Earth’s foremost primary producers, originated near the Triassic–Jurassic boundary (200 Ma), which is close in age to the earliest, generally accepted diatom fossils of the genus Pyxidicula. During
Karolina Bryłka, Andrew J. Alverson, Rebecca A. Pickering, Sylvain Richoz, Daniel J. Conley   +4 more
doaj   +1 more source

High-precision U-Pb ages in the early Tithonian to early Berriasian and implications for the numerical age of the Jurassic-Cretaceous boundary [PDF]

, 2019
The numerical age of the Jurassic-Cretaceous boundary has been controversial and difficult to determine. In this study, we present high-precision U-Pb geochronological data around the Jurassic-Cretaceous boundary in two distinct sections from different ...
Aguirre-Urreta, Maria Beatriz, Concheyro, Graciela, Lena, Luis, Lescano, Marina Aurora, López Martínez, Rafael, Naipauer, Maximiliano, Pimentel, Márcio, Ramos, Victor Alberto, Samankassou, Elias, Schaltegger, Urs, Vennari, Verónica Vanesa   +10 more
core   +1 more source

A new leptonectid ichthyosaur from the Lower Jurassic (Hettangian) of Nottinghamshire, England, UK, and the taxonomic usefulness of the ichthyosaurian coracoid

, 2017
Thousands of ichthyosaurs have been discovered from the rich Lower Jurassic deposits of the UK, with the majority collected from along the Lyme Regis-Charmouth area of the Dorset coast. Here, I describe a new leptonectid ichthyosaur, Wahlisaurus massarae
D. Lomax
semanticscholar   +1 more source

Effects of inherited structures on inversion tectonics: Examples from the Asturian Basin (NW Iberian Peninsula) interpreted in a Computer Assisted Virtual Environment (CAVE) [PDF]

, 2018
We would like to acknowledge financial support by the research project CGL2015–66997-R: “Aplicación del análisis del plegamiento a la investigación de recursos geológicos” (AAPLIREGE) funded by the Spanish Ministry for Economy and Competitiveness and the
Bulnes Cudeiro, María Teresa, Martín González, Santiago, Poblet Esplugas, Josep, Uzkeda Apesteguia, Hodei   +3 more
core   +3 more sources

Sharks, Rays and a Chimaeroid from the Kimmeridgian (Late Jurassic) of Ringstead, Southern England [PDF]

, 2002
Sampling of a lenticular concentration of vertebrate debris and associated sediments from the lower Kimmeridgian of southern England has allowed the study of a diverse and abundant assemblage of chondrichthyan remains.
Underwood, Charlie J.
core   +1 more source

Stable isotope (δ18O and δ13C) sclerochronology of Callovian (Middle Jurassic) bivalves (Gryphaea (Bilobissa) dilobotes) and belemnites (Cylindroteuthis puzosiana) from the Peterborough Member of the Oxford Clay Formation (Cambridgeshire, England): Evidence of palaeoclimate, water depth and belemnite behaviour [PDF]

, 2014
Incremental δ18O and δ13C signals were obtained from three well-preserved specimens of Cylindroteuthis puzosiana and from three well-preserved specimens of Gryphaea (Bilobissa) dilobotes from the Peterborough Member of the Oxford Clay Formation ...
A.L.A. Johnson, Alberti, Anderson, Anderson, Arkhipkin, Arkhipkin, Arthur, B.R. Schöne, Barbin, Barbin, Belin, Bodin, Bradshaw, Brigaud, C. Mettam, Dera, Dickson, Doyle, Doyle, Duff, Dunca, Dutton, E.V. Nunn, Frakes, Frakes, Heilmayer, Hewitt, Hudson, Hudson, Hudson, Hudson, Johnson, Jones, Kenig, Kenig, Lartaud, Li, Li, Lécuyer, Macquaker, Martill, McArthur, Morgans, Morgans, Mutterlose, Mutterlose, NOAA, Norry, Nunn, Nunn, O'Neill, Page, Pierre, Poulsen, Price, Price, Price, Price, Price, Price, Price, Price, Price, Rexfort, Rosales, Rosales, Scheurle, Schöne, Schöne, Sellwood, Steuber, Thiery, Tomašovўch, Voigt, Westermann, Wierzbowski, Wierzbowski, Wierzbowski, Wierzbowski, Wilby, Ziegler, Žák   +81 more
core   +3 more sources

The Jurassic of Denmark and Greenland: Jurassic lithostratigraphy and stratigraphic development onshore and offshore Denmark [PDF]

Geological Survey of Denmark and Greenland Bulletin, 2003
A complete updated and revised lithostratigraphic scheme for the Jurassic succession of the onshore and offshore Danish areas is presented together with an overview of the geological evolution.
Michelsen, Olaf, Nielsen, Lars Henrik, Johannessen, Peter N., Andsbjerg, Jan, Surlyk, Finn   +4 more
doaj