Results 1 to 10 of about 1,549 (147)

Uppermost Albian biostratigraphy and chronostratigraphy [PDF]

open access: yesCarnets de Géologie, 2009
The Albian Stage is the highest chronostratigraphic unit of the Lower Cretaceous Series and underlies the Cenomanian Stage of the Upper Cretaceous Series.
Scott Robert W.
doaj   +3 more sources

A novel chronostratigraphic framework for the Aptian–Albian paleoclimate events [PDF]

open access: yesScientific Reports
The Aptian–Albian interval was marked by paleoclimatic changes encompassing volcanic events and monsoonal activity of which the precise timing were not well-defined.
João M. F. Ramos   +11 more
doaj   +2 more sources

Biostratigraphy of the Cretaceous deposits based on ammonites in the southwest of Qayen area (Qumenjan section) [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2021
Ammonite biostratigraphy could be used in age determination and correlation of rock units in different sedimentary basins. Qumenjan section with 125 meters thickness is mainly formed by grey sandy limestone with grey and thick-bedded limestone ...
Seyed Naser Raisossadat   +3 more
doaj   +1 more source

The Continental Intercalary in Algeria: Analysis, Survey and Perspectives for Green Agriculture Development [PDF]

open access: yesAl-Qadisiyah Journal For Agriculture Sciences, 2022
The Northern Sahara Aquifer System (NSAS) is a complex system that includes several aquifers overlying most areas. The Continental Intercalary, also known as the "Albian groundwater" is an aquifer with impressive characteristics.
Salim Etsouri   +5 more
doaj   +1 more source

Research and Geoconservation of the Albian “Giant” Ammonites Collection in the Basque Coast UNESCO Global Geopark [PDF]

open access: yesGeoconservation Research, 2021
The Basque Coast UNESCO Global Geopark is known worldwide for its great thickness of Upper Cretaceous and Paleocene “flysch” formations. The K/Pg and P/E boundaries are among the most popular sites, together with the IUGS-ICS designated Selandian and ...
Asier Hilario   +2 more
doaj   +1 more source

Assessment of prospects for petroleum bearing Aptian-Albian-Cenomanian strata of the Yamal peninsula - north of Western Siberia, on the basis of 2D seismic survey [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2022
The article presents a brief description of the geological structure and petroleum potential of the Aptian-Albian-Cenomanian strata. On the basis of 2D seismic exploration as part of the Aptian and Albian-Cenomanian levels, new promising objects were ...
Smirnov O.A., Borodkin V.N.
doaj   +1 more source

Cassiopid gastropods from the cretaceous of Western Serbia [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2007
Three species of Cassiopidae (Cerithioidea, Gastropoda) are described from outcrops in the vicinity of the villages Rastište and Mokra Gora in western Serbia. They occur in marly limestones of near shore shallow water deposits.
Banjac Nenad, Bandel Klaus, Kiel Steffen
doaj   +1 more source

Does aid fuel corruption? New evidence from a cross-country analysis

open access: yesDevelopment Studies Research, 2021
This study estimates the effect of foreign aid on corruption using a Two-Step Least Squares method. We address endogeneity using instrumental variables that capture geographical and cultural proximities between donor and recipient countries.
Albian Krasniqi, Venera Demukaj
doaj   +1 more source

Mid-Cretaceous paleoenvironmental changes in the western Tethys [PDF]

open access: yesClimate of the Past, 2018
We present a continuous record of surface water temperature and fertility variations through the latest Barremian–Cenomanian interval (ca. 27 Myr) based on calcareous nannofossil abundances from the western Tethys.
C. Bottini, E. Erba
doaj   +1 more source

First discovery of nautilids from the Albian–Cenomanian succession of the Koppeh Dagh Basin, NE Iran

open access: yesSwiss Journal of Palaeontology, 2021
The Aitamir Formation, situated in the Koppeh Dagh Basin in the northeast of Iran, is known for its well-exposed Albian-to-Cenomanian succession. Although geologists previously documented a number of macro- and microfossils, no nautilids had been ...
Javad Sharifi   +3 more
doaj   +1 more source

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