Results 1 to 10 of about 50 (50)

A possible Laurentian volchoviid ophiocistioid from the Katian of southwestern Ohio [PDF]

Journal of Paleontology, 2021
The Cincinnatian (Katian) of the Cincinnati Tri-State area is widely regarded as one of the most fossiliferous sections known (Meyer and Davis, 2009). Echinoderms from these strata include well-described asteroids, crinoids, cyclocystoids, edrioasteroids, glyptocystoids, mitrates, and ophiuroids.
William I. Ausich, Jeffrey R. Thompson
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The late Katian Elkhorn event: precursor to the Late Ordovician mass extinction

Estonian Journal of Earth Sciences, 2023
The late Katian Elkhorn event is a biogeochemical perturbation preceding the Late Ordovician mass extinction (LOME) with an exceptional record in the United States (U.S.). Results of our recent studies in this interval allow revised temporal ordering to strata across multiple basins providing insights into the magnitude of environmental disturbance ...
Patrick I. McLaughlin, Thijs R. A. Vandenbroucke, Cristiana J. P. Esteves, Alyssa M. Bancroft, Timothy R. Paton, Mark Williams, Carlton E. Brett, Cole Farnam, Poul Emsbo   +8 more
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Chitinozoan biozonation in the upper Katian and Hirnantian of the Welsh Basin, UK

Review of Palaeobotany and Palynology, 2014
AbstractHere we present a chitinozoan biostratigraphical framework for the South Wales upper Katian and Hirnantian (Ashgill) succession. The current study indicates that three of the six Avalonian Ashgill chitinozoan biozones are recognised in the Welsh Basin; the bergstroemi, fossensis and umbilicata biozones.
Challands, Thomas J, Vandenbroucke, Thijs, Armstrong, Howard A, Davies, Jeremy R   +3 more
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Katian (Upper Ordovician) conodonts from Wales [PDF]

Palaeontology, 2013
AbstractMiddle and upper Katian conodonts were previously known in the British Isles from relatively small collections obtained from a few localities. The present study is mainly based on 17 samples containing more than 17 000 conodont elements from an approximately 14‐m‐thick succession of the Sholeshook Limestone Formation in a road cut near Whitland,
FERRETTI, Annalisa, Bergstrom S. M., Barnes C. R.   +2 more
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Diverse endobiotic symbiont fauna from the late Katian (Late Ordovician) of Estonia

Palaeontologia Electronica, 2022
Vinn, Olev, Wilson, Mark A., Holmer, Lars E., Ernst, Andrej, Tinn, Oive, Toom, Ursula (2022): Diverse endobiotic symbiont fauna from the late Katian (Late Ordovician) of Estonia.
Vinn, Olev, Wilson, Mark A., Holmer, Lars E., Ernst, Andrej, Tinn, Oive, Toom, Ursula   +5 more
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Pathways and mechanisms of Late Ordovician (Katian) faunal migrations of Laurentia and Baltica

Estonian Journal of Earth Sciences, 2015
Late Ordovician strata within the Cincinnati Basin record a mass faunal migration event during the C4 and C5 depositional sequences. The geographic source region for the invaders and the paleoceanographic conditions that facilitated dispersal into the Cincinnati Basin has previously been poorly understood.
Adriane R. Lam, Alycia L. Stigall
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Redefinition of the Sandbian–lower Katian conodont biozonation of Baltoscandia

Geological Magazine
Abstract Recent development in the Upper Ordovician conodont biostratigraphy of Baltoscandia highlights the mismatch between the traditionally used conodont zonation and ranges of the eponymous species. Practical application of the zonation is further complicated by the fact that the morphology of the long-ranging species Amorphognathus tvaerensis ...
Tõnn Paiste, Peep Männik, Svend Stouge, Leho Ainsaar, Tõnu Meidla   +4 more
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Ostracods from Upper Ordovician (Katian) carbonate lithofacies in southwest Scotland

Geological Magazine, 2010
AbstractThe Ordovician Craighead Limestone Formation of southwest Scotland was formed on a carbonate platform on the eastern tropical margin of the Laurentia palaeocontinent during the early Katian (c.456 Ma). It yields the most diverse and well-preserved ostracod fauna yet recovered from the Scottish Ordovician succession, with some 25 species ...
Mohibullah, M, Afzal, J, Williams, M, Siveter, DJ, Zalasiewicz, JA, Meidla, T   +5 more
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Three-dimensionally preserved siphuncle in an actinoceratid cephalopod from the late Katian of Bohemia

Estonian Journal of Earth Sciences, 2023
The Ordovician to Carboniferous cephalopods of the order Actinoceratida (Teichert, 1933) are distinguished from all other cephalopods by their large siphuncles, which typically contain heavy, calcareous deposits enclosing a complex system of canals.
Martina Aubrechtová, Vojtěch Turek
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An unusual new ophiuroid (Echinodermata) from the Late Ordovician (early Katian) of Morocco

Comptes Rendus Palevol
A distinctive new genus and species of the subphylum Asterozoa, Componaster spurius n. gen., n. sp., is described from the Late Ordovician (early Katian) of Morocco. Construction of the ambulacral column is considered key to delineation of classes of the subphylum Asterozoa: morphology and configuration of the mouth frame, axial (ambulacral series ...
Glass, Alexander, Blake, Daniel, Lefebvre, Bertrand   +2 more
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