Results 61 to 70 of about 3,061 (198)

On the occurrence of Vinctifer ferrusquiai sp. nov. (Actinopterygii, Aspidorhynchiformes) in the Kimmeridgian (Late Jurassic) deposits near Tlaxiaco, Oaxaca, southern Mexico

Revista Mexicana de Ciencias Geológicas, 2018
Vinctifer ferrusquiai sp. nov. is described in this paper. This aspidorhynchid fish was found in Kimmeridgian marine deposits of the Sabinal Formation, exposed in the Llano Yosobé, near Tlaxiaco, Oaxaca, Mexico. The single specimen of this species shows
Kleyton M. Cantalice, Jesús Alvarado-Ortega, Paulo M. Brito   +2 more
doaj   +1 more source

Late Jurassic Carbon Isotope Excursion (Middle Oxfordian Event) Paces With Astronomical Forcing in the Northwestern Tethys

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract Marine carbonate carbon isotopes (δ13C), over orbital to multi‐million‐year timescales, provide critical insight into the carbon cycle connecting Earth's atmosphere, lithosphere, hydrosphere and biosphere. However, the influence of astronomical forcing on deep time carbon cycle dynamics remains poorly constrained.
Deyan Zhang, Su Li, Xu Yao, Chuanlong Mou, Ulrich Heimhofer   +4 more
wiley   +1 more source

An exquisitely preserved young iguanodontian from the Upper Jurassic of Tanzania sheds light on skeletal fusion patterns within Archosauria

Papers in Palaeontology, Volume 12, Issue 3, May/June 2026.
Abstract Dysalotosaurus lettowvorbecki (Ornithopoda, Dinosauria) is a small‐sized dryosaurid iguanodontian known from various isolated remains collected from the Tendaguru Formation (Upper Jurassic, Tanzania). Micro‐computed tomography of a small individual encased in a block offered a unique opportunity to describe c.
Riccardo Rocchi, Filippo Maria Rotatori, Gabriel S. Ferreira, Federico Fanti   +3 more
wiley   +1 more source

Kastamonina abanica n.gen., n.sp., a Complex Lituolid (Foraminiferida) from the Upper Jurassic Limestone of the Kastamonu Area (North Turkey)

Geologia Croatica, 2010
Kastamonina abanica n.gen., n.sp., is a new complex conical lituolid foraminifer occurring in Upper Jurassic (Kimmeridgian-Portlandian) shallow marine deposits in the Kastamonu region of Northern Turkey.
Ercüment Sirel
doaj   +1 more source

Post‐Eocene 90° CCW Rotation of Sardinia‐South Corsica: Paleomagnetic Evidence From Permian‐Cretaceous Sediments of Nurra (NW Sardinia)

Tectonics, Volume 45, Issue 5, May 2026.
Abstract The paleomagnetism of Miocene calc‐alkaline volcanics and sediments from Sardinia has firmly showed that the Corsica‐Sardinia microplate rotated 50°–60° counterclockwise (CCW) with respect to Europe between 21 and 15 Ma, during its drift from the Provencal margin. However, Permian to Eocene rocks from central‐south Sardinia revealed higher (up
Gaia Siravo, Fabio Speranza, Giacomo Oggiano, Lilla Spagnuolo   +3 more
wiley   +1 more source

A potential stratotype for the Oxfordian/ Kimmeridgian boundary: Staffin Bay, Isle of Skye, UK [PDF]

, 2006
A coastal exposure of the Staffin Shale Formation at Flodigarry, Staffin Bay, Isle of Skye, Scotland, UK fulfils the criteria for definition as the Global Stratotype Section and Point (GSSP) for the base of the Kimmeridgian Stage (Upper Jurassic).
Wierzbowski, Hubert, Matyja, Bronislaw A., Ogg, James G., Wierzbowski, Andrzej, Wright, John K., Page, Kevin N., Coe, Angela L., Hounslow, Mark W.   +7 more
core   +3 more sources

Evolving late Triassic–Jurassic environments of western Europe: the Schwäbisch Gmünd geological path in southwest Germany compared to the ‘Jurassic Coast’ of Dorset, southern England

Geology Today, Volume 42, Issue 3, Page 134-146, May/June 2026.
The geology of southwest Germany is dominated by continental to marine sedimentary rocks deposited within Mesozoic sedimentary basins which have yielded economic hydrocarbon deposits. This stratigraphy has formed the focus of geological and stratigraphical research for centuries, with world‐famous exposures becoming type sections and lending their name
Benedikt M. Steiner, James S.K. Barnet
wiley   +1 more source

Ammonites from the Oxfordian-Kimmeridgian boundary and the Lower–Upper Kimmeridgian of Kachchh, western India [PDF]

, 2013
Several new specimens of ammonites from the Oxfordian and Kimmeridgian of Kachchh, western India, are described and illustrated. The Oxfordian ammonites ?Subdiscosphinctes Malinowska, Perisphinctes Waagen, Dichotomoceras Buckman, and ?Larcheria Tintant ...
Pandey, D., Fürsich, F., Alberti, M., Głowniak, E., Olóriz, F.   +4 more
core  

Depositional Facies, Sequence Stratigraphy, and Diagenesis of Lower Cretaceous Carbonate Reservoir, Southern Iraq: Implications for Petroleum Exploration

Journal of Petroleum Geology, Volume 49, Issue 2, Page 312-345, April 2026.
ABSTRACT The Lower Cretaceous Yamama Formation of southern Iraq represents a key carbonate reservoir within Iraq and the Middle East, yet its complex depositional facies architecture and diagenetic alterations present challenges for predicting reservoir quality.
A. K. A. Mohammed, F. Velledits, I. Q. Mohammed, M. Alsuwaidi, H. Mansurbeg, F. Kristály, D. K. Ivanova, Eloi González‐Esvertit, A. Awdal   +8 more
wiley   +1 more source

(Table 5) Microfacies of Kimmeridgian-?Oxfordian marls at DSDP Hole 76-534A

, 1983
(Table 5) Microfacies of Kimmeridgian-?Oxfordian marls at DSDP Hole 76 ...
Robertson, Alastair H F, James G Ogg (6963563), Ogg, James G, Alastair H F Robertson (6961169), Lubomir F Jansa (6972941), Jansa, Lubomir F   +5 more
core   +1 more source