Jensen, S, Högström, AES, Almond, J, Taylor, WL, Meinhold, G, Høyberget, M, Ebbestad, JOR, Agić, H and Palacios, T (2018) Scratch circles from the Ediacaran and Cambrian of Arctic Norway and southern Africa, with a review of scratch circle occurrences. Bulletin of Geosciences. ISSN 1214-1119 (In Press)

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Abstract

Scratch circles—bedding plane parallel sedimentary structures formed by the passive rotation of a tethered organism into the surrounding sediment—are relatively rare in the geological record. Here new occurrences of scratch circles are described from the Ediacaran–Cambrian Stáhpogieddi Formation, Digermulen Peninsula, Arctic Norway, and from the Ediacaran Nudaus and Urusis formations, Nama Group, of southern Africa. A literature survey confirms a previously noted concentration of scratch circles reported from shallow marine upper Ediacaran–lower Cambrian and paralic Carboniferous rocks. Scratch circle identification and nomenclature are discussed. The stratigraphical range of the trace fossils Treptichnus pedum and Gyrolithes isp. in the Stáhpogieddi Formation are extended downward. Combined with earlier reports of Harlaniella podolica this adds new precision to the placement of the Ediacaran–Cambrian boundary on the Digermulen Peninsula.

Item Type: Article
Additional Information: This is the accepted author manuscript (AAM). The final published version (version of record) is available online via Czech Geological Survey at http://www.geology.cz/bulletin/ - please refer to any applicable terms of use of the publisher.
Uncontrolled Keywords: scratch circles, Ediacaran, Cambrian, Norway, Republic of South Africa, Namibia, trace fossils
Subjects: Q Science > QE Geology
Depositing User: Symplectic
Date Deposited: 31 May 2018 12:23
Last Modified: 31 May 2018 12:35
URI: http://eprints.keele.ac.uk/id/eprint/4965

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