Results 1 to 10 of about 10,504 (208)

The Effect of Size Fraction in Analyses of Benthic Foraminiferal Assemblages: A Case Study Comparing Assemblages From the >125 and >150 μm Size Fractions

open access: yesFrontiers in Earth Science, 2018
Benthic foraminiferal assemblages are employed for past environmental reconstructions, as well as for biomonitoring studies in recent environments. Despite their established status for such applications, and existing protocols for sample treatment, not ...
Manuel F. G. Weinkauf, Yvonne Milker
doaj   +1 more source

Biostratigraphy and depositional history of the tepetate formation at Arroyo Colorado (Early-Middle Eocene), Baja California Sur, Mexico

open access: yesCiencias Marinas, 2000
 An integrated study of Foraminifera, Ostracoda and lithostratigraphy was conducted on samples of the Tepetate Formation from the Arroyo Colorado locality, Baja California Sur (Mexico).
AL Carreño   +2 more
doaj   +1 more source

A bio-chemostratigraphical test of the synchroneity of biozones in the upper Silurian of Estonia and Latvia with some implications for practical stratigraphy [PDF]

open access: yesEstonian Journal of Earth Sciences, 2015
The paper discusses the reliability of different biozones in terms of their synchroneity when crossing facies boundaries within a sedimentary basin. Graptolite biozones are the most trusted ones, but also biozones based on conodonts, chitinozoans and ...
Dimitri Kaljo   +5 more
doaj   +1 more source

Genus Sororistirps (Porifera, Hexactinellida, Ventriculitidae) [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Серия Науки о Земле
Representatives of the genus Sororistirps, distinguished among the Ventriculites, have been detected in the Santonian – Maastrichtian rocks from the southeast of the Russian Plate.
Pervushov, Evgeniy Mikhaylovich
doaj   +1 more source

Note complementaire sur les echinodermes ordoviciens de Sierra Morena

open access: yesEstudios Geologicos, 1986
[fr] Une nouvelle espéce du genre Calix est décrite, le genre Batalleria est redécrit, la présence de Phlyctocystis dans les Monts de Toléde-Sierra Morena est confirmée, et celle de Destombesia est signalée.
J. Chauvel, B. Meléndez
doaj   +1 more source

Early Jurassic foraminiferal assemblages in platform carbonates of Mt. Krim, central Slovenia

open access: yesGeologija, 2017
During the Early Jurassic, the subtropical carbonate platforms of the peri-Tethys Ocean experienced signifiant changes in their architectures, as well as in their biota compositions.
Luka Gale, Matej Kelemen
doaj   +1 more source

LicenseCalpionellid biostratigraphy and sedimentation of the Biancone limestone from the Rudnica Anticline (Sava Folds, eastern Slovenia)

open access: yesGeologija, 2019
Mt Rudnica in eastern Slovenia structurally belongs to the Sava Folds. The mountain itself is an exposure of the Mesozoic core of the Rudnica Anticline.
Daniela Reháková, Boštjan Rožič
doaj   +1 more source

Burdigalian-Langhian foraminifera of the northwest High Zagros Thrust Belt, southwest Iran

open access: yesGeologos, 2021
The foraminiferal contents of the lower–middle Miocene succession exposed in three sections in north Nur Abad on the northwestern side of the High Zagros Thrust Belt were studied.
Roozpeykar Asghar   +3 more
doaj   +1 more source

Distephanopsis concavus Horvat: a revised silicoflgellate species from the Middle Miocene of the Central Paratethys

open access: yesGeologija, 2016
The silicoflgellate species Distephanopsis concavus Horvat is revised based on further research of the type material. This species is characterized by having a basal ring with strongly concave sides which reduce the basal ring area and by four symmetry
Aleksander Horvat
doaj   +1 more source

Testing the stratigraphic consistency of Pleistocene microfossil bioevents identified on the Alpha and Lomonosov Ridges, Arctic Ocean

open access: yesArctic, Antarctic, and Alpine Research, 2021
Two different biostratigraphic approaches are used to identify Marine Isotope Stage 11 (MIS 11) in Arctic Ocean sediments. On the Lomonosov Ridge, globally calibrated nannofossil bioevents constrain the age of sediments back to MIS 13 (Core LOMROG12-3PC).
Flor Vermassen   +4 more
doaj   +1 more source

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