Results 21 to 30 of about 1,613 (196)

First record of the Ordovician fauna in Mila-Kuh, eastern Alborz, northern Iran [PDF]

Estonian Journal of Earth Sciences, 2015
Restudy of the Cambrian–Ordovician boundary beds, traditionally assigned to the Mila Formation Member 5 in Mila-Kuh, northern Iran, for the first time provides convincing evidence of the Early Ordovician (Tremadocian) age of the uppermost part of the ...
Mohammad-Reza Kebria-ee Zadeh, Mansoureh Ghobadi Pour, Leonid E. Popov, Christian Baars, Hadi Jahangir   +4 more
doaj   +1 more source

Discovery of the messaoudensis–trifidum acritarch assemblage (upper Tremadocian–lower Floian, Lower Ordovician) in the subsurface of Morocco [PDF]

Estonian Journal of Earth Sciences, 2015
The upper Tremadocian to lower Floian messaoudensis–trifidum acritarch assemblage was first described from the Skiddaw Group of England and subsequently from several localities on the Gondwanan margin that were positioned in high southern latitudes ...
Hendrik Nowak, Mustapha Akodad, Bertrand Lefebvre, Thomas Servais   +3 more
doaj   +1 more source

Digestive and appendicular soft-parts, with behavioural implications, in a large Ordovician trilobite from the Fezouata Lagerstätte, Morocco. [PDF]

Sci Rep, 2017
Trilobites were one of the most successful groups of marine arthropods during the Palaeozoic era, yet their soft-part anatomy is only known from a few exceptionally-preserved specimens found in a handful of localities from the Cambrian to the Devonian ...
Gutiérrez-Marco JC, García-Bellido DC, Rábano I, Sá AA.   +3 more
europepmc   +3 more sources

Trilobites of Thailand's Cambrian–Ordovician Tarutao Group and their geological setting

Papers in Palaeontology, Volume 9, Issue 5, September/October 2023., 2023
Abstract Tuff‐bearing upper Cambrian to lowermost Ordovician strata on Ko Tarutao island, Satun province, southernmost peninsular Thailand, contain a rich trilobite fauna relevant to global biostratigraphy, peri‐Gondwanan palaeogeography and shifting evolutionary mode.
Shelly J. Wernette, Nigel C. Hughes, Paul M. Myrow, Apsorn Sardsud   +3 more
wiley   +1 more source

The Paleozoic Hydrocarbon System in the Gotland Basin (Central Baltic Sea) Leaks

Earth and Space Science, Volume 10, Issue 6, June 2023., 2023
Abstract The Baltic Basin is known for its numerous Paleozoic hydrocarbon reservoirs. There is published evidence that hydrocarbons are leaking from the seafloor, however, little is known about the hydrocarbon migration pathways from Paleozoic source and reservoir rocks toward the seafloor and their escape structures. To investigate these processes, we
Arne Warwel, Christian Hübscher, Matthias Hartge, Maike Artschwager, Wiebke Schäfer, Jonas Preine, Tobias Häcker, Victoria Strehse, Jānis Karušs, Thomas Lüdmann   +9 more
wiley   +1 more source

Organic‐walled microfossils from the Kistedalen Formation, Norway: acritarch chronostratigraphy of the Baltic Miaolingian and evolutionary trends of placoid acritarchs

Papers in Palaeontology, Volume 8, Issue 4, July/August 2022., 2022
Abstract New acritarch data from the Kistedalen Formation based on two sections with continuous exposure enable us to establish the most detailed Miaolingian acritarch biozonation in Baltica to date. Six interval zones previously established in Gondwana, the Eliasum llaniscum, Cristallinium cambriense, Adara alea, Timofeevia lancarae, Cristallinium ...
Teodoro Palacios, Anette E. S. Högström, Sören Jensen, Jan Ove R. Ebbestad, Heda Agić, Magne Høyberget, Guido Meinhold, Wendy L. Taylor, Benjamin Bomfleur   +8 more
wiley   +1 more source

A Baltic Perspective on the Early to Early Late Ordovician δ13C and δ18O Records and Its Paleoenvironmental Significance

Paleoceanography and Paleoclimatology, Volume 37, Issue 3, March 2022., 2022
Abstract The current study presents new bed‐by‐bed brachiopod δ13C and δ18O records from Öland, Sweden, which together with previously published data from the East Baltic region, constitutes a high‐resolution paired brachiopod and bulk rock carbon and oxygen isotope archive through the Lower to Upper Ordovician successions of Baltoscandia.
Oluwaseun Edward, Christoph Korte, Clemens V. Ullmann, Jorge Colmenar, Nicolas Thibault, Gabriella Bagnoli, Svend Stouge, Christian M. Ø. Rasmussen   +7 more
wiley   +1 more source

Early diagenetic transformation stages revealed by micro-analytical studies of shelly phosphorites, Rakvere region [PDF]

Estonian Journal of Earth Sciences, 2023
Furongian–Tremadocian phosphorites of Estonia are sandstone rich in biogenic apatite, represented by brachiopod detritus. The study focuses on the mineralogical and micro-analytical characterisation of phosphorites from the Aseri, Toolse, and Kabala ...
Sophie Graul, Toivo Kallaste, Marko Moilanen, Mawo Ndiaye, Rutt Hints   +4 more
doaj   +1 more source

Bryozoan‐rich stromatolites (bryostromatolites) from the Silurian of Gotland and their relation to climate‐related perturbations of the global carbon cycle

Sedimentology, Volume 69, Issue 1, Page 162-198, January 2022., 2022
ABSTRACT Bryozoan–stromatolite associations (bryostromatolites) formed conspicuous reef structures throughout the Sheinwoodian (Wenlock) to Ludfordian (Ludlow) stratigraphy on Gotland but have not been described so far. They are mainly composed of encrusting bryozoans forming a complex intergrowth with porostromate and spongiostromate microbes and are ...
Anna Lene Claussen, Axel Munnecke, Andrej Ernst, Marco Brandano   +3 more
wiley   +1 more source

The SPICE carbon isotope excursion in Siberia: A combined study of the upper Middle Cambrianlowermost Ordovician Kulyumbe River section, northwestern Siberian Platform [PDF]

, 2008
An integrated, high-resolution chemostratigraphic (C, O and Sr isotopes) and magnetostratigraphic study through the upper Middle Cambrian–lowermost Ordovician shallowmarine carbonates of the northwestern margin of the Siberian Platform is reported. The
Kouchinsky, Artem
core   +3 more sources