Results 51 to 60 of about 1,865 (81)

New or poorly known Neocomitidae (Ammonitina, Ammonoida) from the lower Hauterivian sedimentary series of the Jura platform and the Vocontian trough (France and Switzerland)

Swiss Journal of Palaeontology
The Hauterivian type region and more widely the Jura mountains were investigated for their ammonites of the family Neocomitidae. Three rare lower Hauterivian genera are described here: (i) a more detailed description of Haroella charcensis Bulot, Pictet,
Antoine Pictet, Luc Georges Bulot
doaj   +1 more source

New biostratigraphical data (calcareous nannofossils, ammonites) and Early to Late Barremian transition in the Urgonien Jaune facies and Marnes de la Russille complex of the Swiss Jura Mountains

Swiss Journal of Palaeontology, 2020
In the central Jura Mountains (Western Switzerland), the Urgonien Jaune (UJ) facies with the Marnes de la Russille beds (MRu) have provided very rich nannofloras associated with very rare Tethyan ammonites.
Eric De Kaenel, Pierre-Olivier Mojon, Antoine Pictet   +2 more
doaj   +1 more source

Barremian-Aptian Dasycladalean algae, new and revisited from the Tirgan Formation in the Kopet Dagh, NE Iran

Carnets de Géologie, 2010
Abundant, diversified algal assemblages comprising more than 25 species of Dasycladales are described from Barremian-Aptian limestone deposits of the Tirgan Formation in NE Iran.
Taherpour Khalil Abad Morteza, Conrad Marc André, Aryaei Ali Asghar, Ashouri Ali Reza   +3 more
doaj  

Nouvelles données sur les Charophytes et Ostracodes du Jurassique moyen-supérieur - Crétacé inférieur de l'Atlas marocain [New data on the Middle-Upper Jurassic - Lower Cretaceous Charophytes and Ostracods from the Moroccan Atlas]

Carnets de Géologie, 2009
The Middle Jurassic-Lower Cretaceous continental "Red Beds" of the Moroccan Atlas have provided very interesting new taxa of charophytes and lacustrine ostracods: Aclistochara africana n.sp. (Bathonian), Feistiella atlantis n.sp.
Mojon Pierre-Olivier, Haddoumi Hamid, Charrière André   +2 more
doaj  

Paleoenvironments of Berriasian–lower Hauterivian deposits in the Western Neotethys: Late development, demise and drowning of the Slivnitsa carbonate platform (Western Bulgaria)

Evolving Earth
Sedimentological and biostratigraphic results are used to interpret the Early Cretaceous history of the newly named Slivnitsa carbonate platform which existed on the northern Neotethyan margin.
Athanas Chatalov, Daria Ivanova
doaj   +1 more source

Tescheniceras gen. nov. (Ammonoidea) and the definition of the Valanginian/Hauterivian boundary in Butkov Quarry (Central Western Carpathians, Slovakia) [PDF]

, 2020
Jurassic and Lower Cretaceous successions of the Manín Unit of the Central Western Carpathians are exposed in Butkov Quarry in the Middle Váh Region, Slovakia.
Vašíček, Zdeněk
core  

Jurassic and Cretaceous Glendonites of the Novoyakimovskaya-1 Borehole (Western Taimyr): Age, Morphology, Depositional Settings and Alterations of Mineral Composition

Russian Journal of Earth Sciences
According to biostratigraphic data, Bathonian and Callovian (Malyshevka and Tochinskoe Formations), Oxfordian (Sigovoe Formation), Volgian and Ryazanian (Yanov Stan Formation), Valanginian and Hauterivian (Sukhaya Dudinka Formation) stages were ...
Rogov Mikhail, Vasileva K., Olenova K. Yu., Zakharov V., Ippolitov A. P., Lutikov Oleg, Panchenko I. V., Kiselev D. N.   +7 more
doaj   +1 more source

Mediterranean Neocomian belemnites, part 3: Valanginian-Hauterivian belemnites

Carnets de Géologie, 2009
The classical papers of Raspail (1829, 1830) and Duval-Jouve (1841) described a wide range of belemnite species, mainly from the Lower Cretaceous of the Castellane-Peyroules area (Alpes de Haute-Provence, France).
Janssen Nico M.M.
doaj  

Laser In Situ U–Pb Isotope Dating of Carbonate Rocks in Weijia Guyot in the Western Pacific Ocean and Its Geological Significance

Journal of Marine Science and Engineering
Shallow-water carbonate rocks constitute a crucial component of large guyots, arising in distinct environments and harboring valuable insights into the evolutionary stages of seamount islands as well as the tectonic conditions of the underlying oceanic ...
Zhenquan Wei, Jinfeng Ma, Gaowen He, Lifeng Zhong, Limin Zhang, Bin Zhao   +5 more
doaj   +1 more source

Enrichment of redox-sensitive trace metals (U, V, Mo, As) associated with the late Hauterivian Faraoni oceanic anoxic event [PDF]

, 2018
The Faraoni Level is a short-lived oxygen-deficient event that took place during the latest Hauterivian. In order to improve our understanding of the palaeoenvironmental conditions that occurred during this event, we have analysed the contents of several
Godet, Alexis, Gardin, Silvia, Adatte, Thierry, Bodin, Stéphane, Steinmann, Philipp, Vermeulen, Jean, Föllmi, Karl, Matera, Virginie, Coccioni, Rodolfo   +8 more
core