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Ordovician stratigraphy of the Stumsnas 1 drill core from the southern part of the Siljan Ring, central Sweden
Uppsala University, Music and Museums, Museum of Evolution.
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2013 (English)In: GFF, ISSN 1103-5897, Vol. 135, no 2, 204-212 p.Article in journal (Refereed) Published
Abstract [en]

The Stumsnas 1 core, drilled in 2011 in the southern part of the Siljan Ring, provides new insights into the stratigraphy of the Ordovician succession in central Sweden. The core section shows evidence of the structural complications caused by the late Devonian meteorite impact in the area. In the core, about 90m of Tremadocian to Darriwilian strata are sandwiched between Proterozoic igneous basement rocks. At the lower contact, the sedimentary succession starts with glauconitic, fine-grained siliciclastics and carbonates directly resting on the weathered basement. The basal siliciclastic unit is overlain by a ca. 19-m-thick limestone succession, well-known from this part of the Baltoscandian Basin, includes strata corresponding to the Latorp Limestone through the upper Holen Formation. This succession is covered by a limestone-marl alternating sequence, representing some yet unknown deeper water facies, presumably coeval to the topmost Holen Formation through upper Dalby Limestone. The upper third of the sedimentary succession in the core includes numerous slices of partly overturned strata, including relatively thick successions of the Slandrom Formation, Fjacka Shale and Jonstorp Formation, as well as carbonate and siliciclastic units of yet unknown stratigraphic origin.

Place, publisher, year, edition, pages
2013. Vol. 135, no 2, 204-212 p.
Keyword [en]
Sweden, Siljan district, Ordovician, Devonian impact structure, stratigraphy, tectonics
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-207652DOI: 10.1080/11035897.2013.813582ISI: 000323317400007OAI: oai:DiVA.org:uu-207652DiVA: diva2:649012
Available from: 2013-09-17 Created: 2013-09-17 Last updated: 2013-09-17Bibliographically approved

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Ebbestad, Jan Ove R.
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