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Late Ordovician sclerites in the Siljan District, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology. Paleobiologi.
Uppsala University, Music and Museums, Museum of Evolution. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology. Paleobiologi.
2007 (English)In: WOGOGOB 2007, 9th meeting of the WOrking Group on Ordovician Geology Of Baltoscandia: Fieldguide and Abstracts, 2007, 110- p.Conference paper, Published paper (Other academic)
Abstract [en]

Isolated and semi-articulated sclerites of machaeridians are common in the Upper Ordovician (lower Nabala Stage) Fjäcka Shale of the Siljan District in Sweden. The organic rich shale offers a high preservation potential, preserving a dysaerobic, quiet deepwater environment. In the succeeding carbonate mounds of the Boda Limestone (Nabala-Porkuni stage) machaeridians and other sclerite bearing animals have hitherto been unknown. Though still rare, the presence of various sclerites in environments such as the carbonate mud mounds is

not surprising, as many of these taxa are widespread stratigraphically, geographically and environmentally.

Amongst the machaeridian sclerites perhaps the most striking find are a few minute sclerites from pockets in the Kallholn and Solberga quarries. These animals are associated with minute fauna of gastropods, ostracodes and complete trilobites, which may have belonged to a cryptofauna. However, the presence of

such faunas in the fossil record is difficult to prove. The diversity of the machaeridian sclerites is high with different genera represented in different settings; it also seems to indicate a higher presence of machaeridians than what is shown at present.

Place, publisher, year, edition, pages
2007. 110- p.
Identifiers
URN: urn:nbn:se:uu:diva-11573ISBN: 978-91-7158-788-6 (print)OAI: oai:DiVA.org:uu-11573DiVA: diva2:39342
Available from: 2008-01-08 Created: 2008-01-08 Last updated: 2015-01-13

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Ebbestad, Jan Ove R.

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