Results 31 to 40 of about 17,813 (226)

Micropalaeontology, biostratigraphy, and depositional setting of the mid-Cretaceous Derdere Formation at Derik, Mardin, south-eastern Turkey [PDF]

open access: yesJournal of Micropalaeontology, 2020
The micropalaeontology of the mid-Cretaceous Derdere Formation (Mardin Group) from outcrops close to the town of Derik in south-eastern Turkey is described here.
M. D. Simmons   +6 more
doaj   +1 more source

Early-Late Cretaceous (Aptian-Cenomanian) Palynomorphs [PDF]

open access: yesJournal of Micropalaeontology, 1985
Abstract. Samples from 12 wells situated mainly in the northern part of the Cyrenaica Shelf of northeast Libya have yielded palynomorph assemblages of Aptian, Albian or Cenomanian aspect. The Aptian assemblages are dominated by land-plant remains and contain relatively few dinoflagellate cysts. By contrast, the latter are generally common in those from
Batten, D. J., Uwins, P. J. R.
openaire   +2 more sources

Stratigraphy and structural position of the type locality of the Phasoula Formation (Upper Triassic, southwestern Cyprus) [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva
The Upper Triassic Phasoula Formation in its type locality in Dhiarizos River valley is interpreted as a large tectonic block incorporated in the Upper Cretaceous Mamonia Mélange.
Bragin Nikita   +4 more
doaj   +1 more source

Study of planktonic morphotype of the Abderaz Formation at type section, Iran [PDF]

open access: yes, 2009
Abderaz Formation at its type section with an age of Turonian-Early Campanian and a thickness of 300 m contains light grey shale and marl. The study of the planktonic foraminifera in isolated form led to differentiate three morphotype groups.
Meysam Shafiee Ardestani
core   +2 more sources

Comparison of the Porosity Parameter in Sediments Obtained Using Traditional and Precision Methods (Cenomanian Deposits in Western Siberia, Russia)

open access: yesQubahan Academic Journal, 2023
The study focuses on porosity, an important parameter for calculating reserves. Traditionally, weight-based methods are used in calculation, which implies a simple approach to estimating hydrocarbon reserves.
Vitaliya Naumenko   +2 more
doaj   +1 more source

Cenomanian Ammonite Zones [PDF]

open access: yesGeological Magazine, 1960
A preliminary statement is made concerning the ammonite genera which have been used in defining the upper Cenomanian (Cretaceous) in Britain. The relations, positions, and characteristics of species of Mantelliceras, Metoicoceras, Utaturiceras, and Protacanthoceras are briefly explained and the need for a change in zonal nomenclature of the uppermost ...
openaire   +1 more source

The Albian-Cenomanian boudary in the northern part of the Don-Medveditsa dislocations. Paper 2. Oryctocoenoses analysis. Conclusions [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Серия Науки о Земле
Ammonite finds at the Miroshniki site, within the Albian-Cenomanian boundary interval, make it possible to identify the presence of the analogues of the Upper Albian zones Mortoniceras fallax (autochthonous burial within aleurolites) and Mortoniceras ...
Pervushov, Evgeniy Mikhaylovich   +3 more
doaj   +1 more source

Taxonomy of Platypterygius campylodon and the diversity of the last ichthyosaurs [PDF]

open access: yesPeerJ, 2016
A complex and confusing taxonomy has concealed the diversity dynamics of Cretaceous ichthyosaurs (Reptilia) for decades. The near totality of Albian-Cenomanian remains from Eurasia has been assigned, by default, to the loosely defined entity ...
Valentin Fischer
doaj   +2 more sources

Cenomanian ammonites from northern aquitaine

open access: yesCretaceous Research, 1983
Ammonites from the Cenomanian of northern Aquitaine include Neolobites vibrayeanus (d'Orbigny, 1841), Calycoceras (Calycoceras) naviculare (Mantell, 1822) , C. cenomanense (d'Archiac, 1846) , Pseudocalycoceras cf. dentonense (Moreman, 1942) , Eucalycoceras sp., Acanthoceras (Acanthoceras) pseudorenevieri (Spath, 1926) , A.
Moreau, P, Francis, I, Kennedy, W
openaire   +2 more sources

LE RELAZIONI TRA LE ARENARIE DI SARNICO (CONIACIANO) E LE UNITA' CENOMANIANO-TURONIANE NELL'AREA DI CAPRIOLO - CORNO PENDITA (BS) (BACINO LOMBARDO, ALPI MERIDIONALI)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2017
The Cenomanian-Coniacian units of the Capriolo - Corno Pendita area belong to the eastern margin of the Lombardy Basin. The Coniacian turbidite sandstone lithosome (Arenarie di Sarnico) unconformably overlies the Cenomanian-Turonian units.
R. BERSEZIO, L. MENSINI
doaj   +1 more source

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