Results 91 to 100 of about 4,344 (221)

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  

Palynofacies and Paleoenvironment investigation of the Hauterivian – Early Aptian Ratawi and Zubair formations, Balad oilfield, Central Iraq

Tikrit Journal of Pure Science, 2019
This work depends on a detailed optical observation study of sedimentary organic facies from the Hauterivian – early Aptian Ratawi and Zubair formations from the Ba-1 well, Balad oilfield, Central Iraq.
Adnan Q. Mahdi, Fawzi M. Al-Beyati, A. M. Al Tarif, El-Arabi H. Shendi, Mohamed I.Abdel-fattah   +4 more
doaj   +1 more source

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

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

Montseciella, a new orbitolinid genus (Foraminiferida) from the Uppermost Hauterivian -Early Barremian of SW Europe [PDF]

, 1999
Montseciella, a new larger foraminiferal orbitolinid genus, is established. It comprises: M. glanensis (Foury, 1968) (uppermost Late Hauterivian to basal Early Barremian) from Serra del Montsec (Lleida Prov., Catalonian Pyrenees, Spain), Basse Provence ...
Cherchi, A., Schroeder, R.
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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

Stratigraphic method of eustatic quantifications: a sea level curve based on Jurassic-Cretaceous strata of the Russian Platform [PDF]

, 1993
Two types of sea level are presently defined: relative and eustatic. Relative sea level (RSL) is the sea surface elevation relative to some local land surface.
Jones, Michelle
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