Results 11 to 20 of about 9,423 (214)

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   +4 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   +3 more sources

Albian ammonites from northern Pakistan [PDF]

open access: yesActa Geologica Polonica, 2014
Abstract The occurrence of rich Albian ammonite faunas in what is now northern Pakistan has been known for more than 80 years, but there has been no comprehensive account of the assemblages present. A total of 36 taxa are described below. The middle part of the Lumshiwal Formation yields Upper Aptian ammonites south of the Samana Range. Elsewhere,
William James Kennedy, Ali N. Fatmi
openaire   +2 more sources

Albian sedimentation in western Atlas, Morocco

open access: yesCretaceous Research
Detailed study of field sections and extensive ammonite collection allowed to specify the sedimentary evolution and age of the Albian series of the Western Atlas (Morocco). After a significant hiatus of earliest Albian age, the Albian transgression began in the late Douvilleiceras leightonense Zone with partly clastic deposits.
Jaillard, Etienne   +3 more
openaire   +4 more sources

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst   +8 more
wiley  

+6 more sources

Albian bivalves from Madiela Formation in north Gabonese coastal basin

open access: yesBSGF - Earth Sciences Bulletin, 2019
A study of Albian bivalves from Madiela Formation in north of Gabonese coastal basin has been carried out from N’Toum quarry geological section. Four genera including six species are identified: Liopistha (Psilomya) sp. 1, ? Liopistha (Psilomya) sp.
Musavu Moussavou Benjamin
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

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

The new evidence of Albian – Cenomanian boundary biostratigraphy for first time from Iran

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2012
The Sarvak Formation in Tang – e – Chenarbashi with 712 meters thickness encompasses Albian - Cenomanian planktonic foraminifera. In the studied section, surveying the Albian – Cenomanian boundary is indicated that Rotalipora appeninica Zone not be ...
J., Daneshian,   +2 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

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