Results 21 to 30 of about 4,822 (191)

The final, Late Campanian – Early Maastrichtian stage of Micraster and Isomicraster (Echinoidea, Spatangoida) development [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Серия Науки о Земле
The final, late Campanian – early Maastrichtian stage of development of echinoids Micraster and Isomicraster, was studied based on extensive material from the Upper Cretaceous sediments of the North Caucasus, Mangyshlak, Kopetdag, Volga and ...
Kalyakin, Evgeniy Aleksandrovich
doaj   +1 more source

New data on the Lamut Suite age (the Algan mountains, the north-western part of the Koryak Highland) [PDF]

open access: yesВестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2018
This article presents new data obtained during the study of radiolarians and U-Pb dating of clastic zircons from sections of the Lamut suite, located in the upstream of the Oltyan River and the northern branch of Mount Pik (the Algan Mountains).
T.N. Palechek   +2 more
doaj   +1 more source

Volcaniclastic rocks and reconstruction of a volcanosedimentary paleoenvironment in Campos Basin, SE Brazil [PDF]

open access: yesBrazilian Journal of Geology, 2023
Santonian-Campanian tuffaceous siltstone, epiclastic siltstone, arkose, and fossiliferous mudstone occur in a 45-m-thick section of well 1-BRSA-37-RJS drilled in the southern Campos Basin, offshore SE Brazil.
Yara Veloso Magalhães Frank   +1 more
doaj   +1 more source

Biostratigraphy of Shiranish Formation from Selected Wells, Central of Iraq

open access: yesIraqi Geological Journal, 2023
The Quantitative high-resolution planktonic foraminiferal analysis of the subsurface section in three selected wells in the Ajeel Oil Field (Aj-8, Aj-12, and Aj-15) in Tikrit Governorate, Central Iraq has revealed that Shiranish Formation ...
Anwar Mousa, luay Shakir
doaj   +1 more source

Paleoenvironment of the Late Cretaceous (Late Touronian–Early Campanian) Ostarcoda in the Kometan Formation, Dokan Area, Kurdistan region, NE-Iraq

open access: yesKuwait Journal of Science, 2021
In the present study selected the Kometan Formation (Late Turonian - Early Campanian) from Dokan Area, NE-Iraq. In this formation studied ostracoda identified fifteen open ostracoda species belonging to ten genus (Bairdia, Bairdiacypris, Bythocypris ...
zardasht Amhed Taha
doaj   +1 more source

On the Cretaceous mangroves of Bahariya Oasis, Egypt [PDF]

open access: yesTaeckholmia, 2016
Petrified stems (rhizomes) of a fern are described from Late Cretaceous (Cenomanian)beds in Bahariya Oasis. The discovered stems are related to Paradoxopteris stromeriHirmer (fern rachii) and to Weichselia reticulata Stokes & Webb.
Marwah Kamal-El-Din   +4 more
doaj   +1 more source

Pterosaur Tracks from the Upper Cretaceous Anacleto Formation (Neuquén Basin), Northern Patagonia, Argentina: Insights into Campanian Pterosaur Diversity in Gondwana

open access: yesDiversity, 2022
The Campanian Anacleto Formation holds an abundant and diverse ichnofossil and body-fossil vertebrate record. Despite the striking diversity of this record, pterosaur fossils had never been described from the unit.
Ignacio Díaz-Martínez   +13 more
doaj   +1 more source

New fossil lizard specimens from a poorly-known squamate assemblage in the Upper Cretaceous (Campanian) San Juan Basin, New Mexico, USA [PDF]

open access: yesPeerJ, 2020
Recent collection efforts in the upper Campanian (∼76-73.5 Ma) Fruitland and Kirtland formations of northwestern New Mexico have significantly increased the taxonomic diversity of lizards in this historically poorly understood squamate assemblage.
C. Henrik Woolley   +2 more
doaj   +2 more sources

The Platform Carbonates of Monte Jouf, Maniago, and the Cretaceous Stratigraphy of the Italian Carnian Prealps

open access: yesGeologia Croatica, 2010
The Late Cretaceous strata of Monte Jouf are reasonably pure, white limestones, and are part of the stratigraphic unit known as Calcari del Monte Cavallo. M.
Nicola H.M. Swinburne, Adriano Noacco
doaj   +1 more source

Paleoenvironmental Study of the Late Cretaceous–Eocene Tethyan Sea Associated with Phosphorite Deposits in Jordan

open access: yesApplied Sciences, 2023
Petrological, geochemical, and biostratigraphical investigations have been conducted on seventy-nine samples from four selected sections in Jordan to understand the factors that influenced the enrichment and deposition of massive phosphorite deposits ...
Mohammad Alqudah   +3 more
doaj   +1 more source

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