Results 41 to 50 of about 729 (158)

Gold Mineralizing Potential of the Late Triassic Calcareous, Carbonaceous and Sulfide‐Rich Sedimentary Rocks of the Isatomae Formation in the South Kitakami Belt, Japan

open access: yesResource Geology, Volume 76, Issue 1, January/December 2026.
Isatomae Formation illustrating mineralogical and geochemical characteristics. (a) Overview of the Isatomae Formation, showing the marine anoxic environment and related biogenic processes. (b) Deposition of metal‐rich Fe oxyhydroxides were transformed into sulfides through diagenesis and low grade metamorphism.
June Born Born   +4 more
wiley   +1 more source

Holostratigraphy of the Kahmah regional Series in Oman, Qatar, and the United Arab Emirates

open access: yesCarnets de Géologie, 2008
The stratigraphic framework of the uppermost Jurassic - Lower Cretaceous interval of the Gulf area is revised using both historical and recently acquired paleontological (ammonites, calpionellids, foraminifers, 'calcareous' algae), sedimentological and ...
Granier Bruno
doaj  

The Cenomanian–Turonian boundary interval in the Western Canada Foreland Basin: Stratigraphy, geochemistry, geochronology and sea‐level changes recorded in expanded and condensed clastic successions

open access: yesThe Depositional Record, Volume 11, Issue 5, Page 1200-1258, November 2025.
Shallow‐marine mudstone of the Cretaceous Kaskapau Formation in the British Columbia foredeep preserves a 185 m thick record of OAE2. The organic carbon‐isotope and osmium‐isotope excursions can be correlated in detail with other Cenomanian–Turonian boundary sections around the world.
A. Guy Plint   +12 more
wiley   +1 more source

THE “UNKNOWN” GREEK PALEOENVIRONMENT AND FOSSILS: EVALUATING GEOGRAPHY CURRICULUM PROPOSALS FOR ELEMENTARY SCHOOL

open access: yesEuropean Journal of Geography, 2017
In this study we introduce teaching proposals to “inject” ammonite fossils, in the Geography syllabus, as evidence of Greek paleoenvironment, which at the moment is the only existing geoscience subject of Greek primary curriculum.
Stiliani Fragouli   +2 more
doaj   +2 more sources

MIDDLE JURASSIC BELEMNITES AND AMMONITES (CEPHALOPODA) FROM TELMA-DAREH, NORTHERN IRAN

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2013
Ammonites and belemnites from a Middle Jurassic section at Telma-Dareh (Alborz Mountains, northern Iran) are described. The lithology of the studied section consists of an alternation of marls and limestones attributed to the Dalichai Fm., overlying the ...
HORACIO PARENT   +5 more
doaj   +1 more source

Black shale deposition during the Early Jurassic: Geochemistry of Pliensbachian and Toarcian sedimentary rocks of the Hunzen Well, Hils Syncline, Northwest German Basin

open access: yesThe Depositional Record, Volume 11, Issue 5, Page 1451-1478, November 2025.
Our research uses a multidisciplinary approach, including organic and inorganic geochemistry, biostratigraphy, carbon isotope geochemistry and organic petrography to reconstruct depositional conditions and organic matter accumulation during the Pliensbachian and Toarcian.
Premila Wijesinghe   +7 more
wiley   +1 more source

Zones d'ammonites et de foraminifères du Vraconnien au Turonien : Une comparasion entre les domaines boréal et téthysien (NW Europe / Tunisie centrale)

open access: yesCarnets de Géologie, 2008
Depuis la fin du 19ème siècle, l'intervalle comprenant l'Albien supérieur élevé, le Cénomanien, le Turonien et le Coniacien basal a été subdivisé d'abord en zones d'ammonites puis, à partir du milieu du 20ème siècle, en zones de foraminifères ...
Amédro Francis, Robaszynski Francis
doaj  

Cenomanian Ammonite Zones [PDF]

open access: yesGeological Magazine, 1960
A preliminary statement is made concerning the ammonite genera which have been used in defining the upper Cenomanian (Cretaceous) in Britain. The relations, positions, and characteristics of species of Mantelliceras, Metoicoceras, Utaturiceras, and Protacanthoceras are briefly explained and the need for a change in zonal nomenclature of the uppermost ...
openaire   +1 more source

DeepFaune New England: A Species Classification Model for Trail Camera Images in Northeastern North America

open access: yesEcology and Evolution, Volume 15, Issue 11, November 2025.
The DeepFaune New England model classifies wildlife species in trail camera images, identifying 24 taxa from northeastern North America with high (97%) accuracy. The model was adapted from the DeepFaune model for identifying European wildlife, demonstrating the practicality of transfer learning across continents. The majority of training data is openly
Laurence A. Clarfeld   +16 more
wiley   +1 more source

The Douvilleiceratidae (Ammonoidea) of the Lower Aptian historical stratotype area at Cassis-La Bédoule (SE France)

open access: yesCarnets de Géologie, 2008
Recent biostratigraphic research in the marly limestones of the Cassis-La Bédoule area (SE France) provided a rich macrofauna of Douvilleiceratidae Parona & Bonarelli, 1897. From the uppermost Barremian (Pseudocrioceras waagenoides Subzone) to the middle
Tronchetti Guy   +4 more
doaj  

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