Results 21 to 30 of about 1,910 (210)

Some perisphinctoid ammonites of the Štramberk Limestone and their dating with associated microfossils (Tithonian to Lower Berriasian, Outer Western Carpathians, Czech Republic) [PDF]

open access: yesGeologica Carpathica, 2017
The present contribution deals with the taxonomy of seven species of perisphinctoid ammonite from the Štramberk Limestone (Outer Western Carpathians, Czech Republic) deposited in Moravian-Silesian museums.
Vašíček Zdeněk   +2 more
doaj   +2 more sources

Lower Cretaceous (Berriasian-Aptian) biostratigraphy of the Neuquén Basin [PDF]

open access: yesGeological Society, London, Special Publications, 2005
Abstract The Berriasian-Aptian succession in the Neuquén Basin is mainly marine in the lower part and non-marine in the upper portion. A detailed ammonite zonation is presented for the Berriasian-?Early Barremian interval. While some ammonite taxa are endemic, others are widely distributed and there are several levels where correlation can be
Aguirre-Urreta, Maria Beatriz   +4 more
openaire   +3 more sources

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

open access: yesEvolving 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   +2 more sources

The Berriasian genus Groebericeras in Argentina and the problem of its age

open access: yes, 1999
Groebericeras bifrons Leanza is described from the Chacao Formation of central Mendoza and the Lo Valdés Formation of central Chile. The species appears limited to the Argentiniceras noduliferum Zone, which is traditionally placed in the lower Berriasian.
Aguirre-Urreta, (Maria Beatriz)   +1 more
openaire   +2 more sources

Recurrent volcanic activity recorded in araucarian wood from the Lower Cretaceous Springhill Formation, Patagonia, Argentina: Palaeoenvironmental interpretations [PDF]

open access: yesActa Palaeontologica Polonica, 2021
This paper describes a petrified trunk collected from a conglomerate bed of the Springhill Formation (Berriasian–Valanginian) in the Estancia El Álamo locality, Santa Cruz Province, Argentina.
Georgina M. Del Fueyo   +3 more
doaj   +1 more source

Aptychi from the Berriasian/Valanginian (France and Spain): new stratigraphical and morphological details

open access: yesAnnales Societatis Geologorum Poloniae, 2016
Late Berriasian–earliest Valanginian lamellaptychi (Cephalopoda) are described in detail for the first time. With one exception, all species belong to early representatives of Mortilletilamellaptychus . The majority of the well dated aptychi come from the cephalopod-rich sediments of the Vocontian Basin in south-eastern France; others are from south ...
Vašíček, Z. (Zdeněk)   +2 more
openaire   +4 more sources

Formation and structure of regional reservoirs of the Achimov petroleum bearing strata of the Gydan Peninsula [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2021
The main prospects for hydrocarbon accumulations search in the Berriasian-Lower Aptian strata of the Gydan Peninsula are associated with the Achimov petroleum bearing strata. The features of its structure and conditions of formation are considered.
Bardachevskiy V.N.
doaj   +1 more source

Preliminary Appraisal of a Correlation Between Glaciations and Large Igneous Provinces Over the Past 720 Million Years

open access: yesGeophysical Monograph Series, Page 169-190., 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.
Nasrrddine Youbi   +9 more
wiley  

+1 more source

Linking the Variation of Sediment Accumulation Rate to Short Term Sea-Level Change Using Cyclostratigraphy: Case Study of the Lower Berriasian Hemipelagic Sediments in Central Tunisia (Southern Tethys)

open access: yesFrontiers in Earth Science, 2021
High-resolution magnetic susceptibility and % CaCO3 records (5 to 10 cm sampling interval) are used to track astronomical cycles from a Lower Berriasian record from central Tunisia.
Hamdi Omar   +4 more
doaj   +1 more source

Two look-alike dasycladalean algae: Clypeina isabellae masse, Bucur, Virgone & Delmasso, 1999 from the Berriasian of Sardinia (Italy) and Clypeina loferensis sp. N. from the upper Jurassic of the Northern Calcareous Alps (Austria) [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2009
New material from the Berriasian of eastern Sardinia, Italy, and from the NW of Sardinia published by PECORINI in 1972 as 'Clypeina sp. A', allows a better characterization and an emended diagnosis of Clypeina isabellae MASSE et al., 1999 from the ...
Schlagintweit Felix   +2 more
doaj   +1 more source

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