Results 1 to 10 of about 5,951 (224)

Depositional Setting of Eastern Sakarya Zone (NE Türkiye): Late Cretaceous–Paleogene Period Biostratigraphy, Sedimentology and Tectono‐Sedimentary Basin Evolution

open access: yesBasin Research, Volume 38, Issue 3, May–June 2026.
K‐Pg transition and Maastrichtian stage of sedimentary basin evolution of the Eastern Sakarya Zone. ABSTRACT This study reconstructs the late Campanian–Thanetian tectonic and sedimentary evolution of the Eastern Sakarya Zone Basin (Türkiye) during the closure of the Neotethys Ocean, through the integration of tectonic, biostratigraphic and sedimentary ...
Fatih Köroğlu
wiley   +1 more source

Crystal Organisation of Muscle Attachment Sites of Bivalved Marine Organisms: A Juxtaposition Between Brachiopod and Bivalved Mollusc Shells

open access: yesCrystals
The movement of valves of bivalved invertebrates is enabled through the action of muscles and the interplay between the muscles and the hinge ligament. The muscles that move the valves attach to their internal surface. To promote the structural integrity
Sebastian Hoerl   +8 more
doaj   +1 more source

Macroevolution of Steep Interspecific Metabolic Allometry in an Old Insect Order

open access: yesEcology Letters, Volume 29, Issue 5, May 2026.
We investigated the macroevolution of metabolic allometry in an old insect order (Odonata: dragonflies and damselflies) to test the hypothesis that metabolic scaling exponents reflect evolutionary constraints and a general slope of 0.75 on a log–log scale.
Daniel Schönberger   +6 more
wiley   +1 more source

Sections in the western slope of the south urals perspective for the choice of the famennian regional boundary stratotype point

open access: yesЛитосфера, 2015
The Bol’shaya Barma, Akkyr, Ryauzyak and Kuk-Karauk sections in the western slope of the South Urals are considered to be perspective sections for the identification of Famennian Regional Boundary Stratotype Point (RBSP).
R. Ch. Tagarieva, A. G. Mizens
doaj  

Lower Silurian biostratigraphy of the Viirelaid core, western Estonia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2007
The distribution of five groups of fossils in the upper Llandovery (Telychian) and Wenlock of the Viirelaid core section, Estonia, is presented and discussed in terms of their biozones (conodonts and chitinozoans) and mutual positions (scolecodonts ...
Nestor, Viiu   +6 more
doaj  

The Turonian-Coniacian deposits of the south-west of the Ulyanovsk-Saratov trough

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
Integrated study of a series of the Turonian and Coniacian complete geological records has revealed the stratigraphic completeness and specified the faunal contents of the deposits.
E. M. Pervushov   +4 more
doaj   +1 more source

Study on Some Triassic Macrofossils of the Hasanoğlan-Bayramdere Region, Ankara, Turkey

open access: yesBulletin of the Mineral Research and Exploration, 1968
The studied material was collected by the author during the fieldwork carried out in 1966, from the uppermost Triassic dark, coarse-grained sandstones of Bayramdere formation.
Utarit BİLGÜTAY
doaj  

The regional stratotype section and point for the base of the Hirnantian Stage (the uppermost Ordovician) at Mirny Creek, Omulev Mountains, Northeast Russia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2008
A complete Hirnantian sequence comprising the Normalograptus extraordinarius and N. persculptus biozones is well developed at the Mirny Creek section in the Omulev Mountains.
Koren, Tatyana N.   +1 more
doaj  

A new data about systematic composition of Thanetian flat terebratulids of South-West Crimea

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2015
The revision of flat Thanetian terebratulids of South-West Crimea, included until the last time Terebratula bisinuata Lam., T. mischensis Ilyina, T. plana Zel. and Oleneothyris pinguinensis Zel., has been made.
V. N. Komarov, A. O. Andrukhovich
doaj   +2 more sources

Polytaxonomic and monotaxonomic zonal biochronological scales in biostratigraphy

open access: yesЛитосфера, 2016
The method of increasing the correlation potential of zonal biochronological scales by creating the polytaxonomic complex characteristic of zone subdivisions is proposed. For this operation is necessary the normative zonal scale, by which biozones of the
V. V. Chernykh, N. A. Kucheva
doaj  

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