Solutan echinoderms from the Lower Ordovician of the Montagne Noire (France): new data and palaeobiogeographic implications [PDF]
Estonian Journal of Earth Sciences, 2023 Solutans are relatively common members of echinoderm assemblages in the Saint-Chinian Formation (upper Tremadocian) of the Montagne Noire (France). The revision of all available material confirms that most specimens can be assigned to Minervaecystis ...
Christophe Dupichaud +2 more
doaj +1 more source
Ordovician conodonts of the Katkoyeh formation in the Kuh-e-Bonorg section, Kalmard Horst (west of Tabas) [PDF]
Journal of Stratigraphy and Sedimentology Researches, 2020 In this research, Ordovician conodonts obtained from the sedimentary succession of the informal Katkoyeh formation is studied in a stratigraphic section at the south of Kuh-e-Bonorg, eastern flank of Kalmard Anticline in the west of Tabas (Central Iran).
Mohammad Nezhadabbas +3 more
doaj +1 more source
Variability of conch morphology in a cephalopod species from the Cambrian to Ordovician transition strata of Siberia [PDF]
Acta Palaeontologica Polonica, 2020 A block of stromatolitic limestone found on the Angara River shore near Kodinsk, Siberia, derived from the exposed nearby Ust-kut Formation, has yielded a sample of 146 ellesmeroceratid nautiloid specimens.
Jerzy Dzik
doaj +1 more source
Early diagenetic transformation stages revealed by micro-analytical studies of shelly phosphorites, Rakvere region [PDF]
Estonian Journal of Earth Sciences, 2023 FurongianâTremadocian 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 +4 more
doaj +1 more source
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 +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 +9 more
wiley +1 more source
Advances in the Lower Ordovician of the western Iberian Chain, NE Spain [PDF]
Estonian Journal of Earth Sciences, 2023 The western Iberian Chain of NE Spain represents a lateral prolongation of the West Asturian-Leonese Zone. As other proximal sectors fringing NW Gondwana, the chain comprises a conÂformable and continuous FurongianâTremadocian transition, comprising a
J. Javier Álvaro +1 more
doaj +1 more source
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 +8 more
wiley +1 more source
Trilobites and biofacies in the Early–Middle Ordovician of Baltica and a brief comparison with the Yangtze Plate [PDF]
Estonian Journal of Earth Sciences, 2013 Baltica except for Baltoscandia was subject to an early Tremadocian immigration of trilobites similar to that on other plates. In Baltoscandia the Olenid biofacies lingered on until it was replaced by the late Tremadocian Ceratopyge biofacies.
Jan Bergström † +2 more
doaj +1 more source
High-resolution carbon isotope stratigraphy of the Lower and Middle Ordovician succession of the Yangtze Platform, China [PDF]
Estonian Journal of Earth Sciences, 2023 Variation in the relative abundance of the stable carbon isotopes has been widely used to correlate Ordovician marine successions over the past two decades.
Rongchang Wu +8 more
doaj +1 more source