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New olenellid trilobites of the Digermul Peninsula, Finnmark, Northern Norway –Constraints on lower Cambrian biostratigraphy
Tromsø Universitetsmuseum.
Uppsala universitet, Enheten för musik och museer, Evolutionsmuseet.
Área de Paleontología, Universidad de Extremadura, Avenida de Elvas s/n, Badajoz, Spain.
Área de Paleontología, Universidad de Extremadura, Avenida de Elvas s/n, Badajoz, Spain.
2011 (Engelska)Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
Abstract [en]

The Ediacaran to Early Ordovician succession on the Digermul Peninsula measures 1500m,mostly consisting of well-preserved siliciclastics. The Ediacaran–Cambrian transitionhere contains a rich suite of trace fossils comparable with that of the GSSP section inNewfoundland. New discoveries of Treptichnus pedum indicate that the upper part ofthe Manndraperelva Member is Cambrian. The first trilobites are found in the Uppermember of the Doulbasgaissa Formation. Previously only a few Kjerulfia lata specimenswere known, but fieldwork in the Summer of 2011 added new material of this species anda new Elliptocephala species. Both Kjerulfia lata and acritarchs place the trilobite-bearinglevel in the Holmia kjerulfia Assemblage Zone. The higher stratigraphic position of theDoulbasgaissa Formation suggested by Nielsen and Schovsbo (2011) is thus contradicted.With three olenellids and other shelly fauna, the Holmia kjerulfia Assemblage Zone in theMjösa area shows a diversity not seen on Digermul. However, the two olenellids in Digermulare unusual in Baltoscandia, where most species are known from isolated occurrences and fewor incomplete specimens. Comparison with the new material and constraints using acritarchsshould provide significant improvements on the correlation of this level in Baltoscandia.

Ort, förlag, år, upplaga, sidor
2011. s. 24-
Serie
The Palaeontological Association Newsletter, ISSN 0954-9900 ; 78
Nyckelord [en]
Lower Cambrian, Digermulen, Norway, acritarchs, trace fossils, trilobites
Nationell ämneskategori
Annan geovetenskap och miljövetenskap
Identifikatorer
URN: urn:nbn:se:uu:diva-162726OAI: oai:DiVA.org:uu-162726DiVA, id: diva2:461575
Konferens
The Palaeontological Association 55th Annual Meeting, 17th–20th December 2011, Plymouth University, Programme and Abstracts
Tillgänglig från: 2011-12-05 Skapad: 2011-12-05 Senast uppdaterad: 2015-01-13

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