Blar i forfatter Norges arktiske universitetsmuseum "Jensen, Sören"
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Life through an Ediacaran glaciation: Shale- and diamictite-hosted organic-walled microfossil assemblages from the late Neoproterozoic of the Tanafjorden area, northern Norway
Agic, Heda; Jensen, Sören; Meinhold, Guido; Högström, Anette Elisabeth Sofi; Ebbestad, Jan Ove R.; Høyberget, Magne; Palacios, Teodoro; Taylor, Wendy L. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-05)New organic-walled microfossil (OWM) assemblages are reported from upper Neoproterozoic glacial and interglacial siliciclastic deposits in Finnmark, northern Norway. A nearly continuous sedimentary succession of the Vestertana Group contains two glaciogenic units, the Smalfjorden and Mortensnes formations, interpreted as end-Cryogenian Marinoan and Ediacaran glaciations, respectively. We investigated ... -
New information on the Ediacaran-Cambrian transition in the Vestertana Group, Finnmark, northern Norway, from trace fossils and organic-walled microfossils
Högström, Anette; Jensen, Sören; Palacios, Teodoro; Ebbestad, Jan Ove R. (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)The Vestertana Group on the Digermul Peninsula, Finnmark, northern Norway, presents one of the few, potentially continuous Ediacaran– Cambrian sections in Scandinavia. Trace fossils provide the main age constraint, with the boundary traditionally placed at the base of the Breidvika Formation. Here, we provide trace-fossil evidence to show that this boundary is at least as low as the third cycle of ... -
New occurrences of Palaeopascichnus from the Stáhpogieddi Formation, Arctic Norway, and their bearing on the age of the Varanger Ice Age.
Jensen, Sören; Högström, Anette; Høyberget, Magne; Meinhold, Guido; McIlroy, Duncan; Ebbestad, Jan Ove R.; Taylor, Wendy L.; Agic, Heda; Palacios, Teodoro (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-18)We report on new occurrences of the late Ediacaran problematicum <i>Palaeopascichnus</i> (Protista?) from the Stáhpogieddi Formation, Arctic Norway. The stratigraphically lowest occurrences are in beds transitional between the Lillevannet and Indreelva members: the highest in the second cycle of the Manndrapselva Member, stratigraphically close to the lowest occurrences of Cambrian-type trace fossils. ... -
Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway.
Meinhold, Guido; Willbold, Matthias; Karius, Volker; Jensen, Sören; Agić, Heda; Ebbestad, Jan Ove R.; Palacios, Teodoro; Högström, Anette; Høyberget, Magne; Taylor, Wendy L. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-16)The Digermulen Peninsula in northeastern Finnmark, Arctic Norway, comprises one of the most complete Ediacaran–Cambrian transitions worldwide with a nearly continuous record of micro- and macrofossils from the interval of the diversification of complex life. Here, we report on the provenance and post-depositional alteration of argillaceous mudstones from the Digermulen Peninsula using rare earth ... -
Scratch circles from the Ediacaran and Cambrian of Arctic Norway and the Republic of South Africa, with a review of scratch circle ocurrences
Jensen, Sören; Högström, Anette; Almond, John E.; Taylor, Wendy L.; Meinhold, Guido; Høyberget, Magne; Ebbestad, Jan Ove R.; Agic, Heda; Palacios, Teodoro (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-07-13)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, ...