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The Henson Gletsche...
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Geyer, GerdUppsala universitet,Paleobiologi
(författare)
The Henson Gletscher Formation, North Greenland, and its bearing on the global Cambrian Series 2-Series 3 boundary
- Artikel/kapitelEngelska2011
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2011-09-23
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Czech Geological Survey,2011
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LIBRIS-ID:oai:DiVA.org:uu-160747
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-160747URI
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https://doi.org/10.3140/bull.geosci.1252DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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The Henson Gletscher Formation of North Greenland yields moderately diverse trilobite faunas which bracket the Cambrian Series 2-Series 3 boundary interval. A number of the trilobite taxa permit correlation into other parts of Laurentia and to other Cambrian continents, thus enhancing correlation within this stratigraphical interval of the traditional Lower-Middle Cambrian boundary. In particular, the occurrence of Ovatoryctocara granulata and O. yaxiensis substantially improves the intercontinental recognition of the O. granulata level, a prime GSSP candidate. In contrast, the level with Oryctocephalus indicus cannot be located in a number of Cambrian continents with sufficient precision, making this level unsuitable for the definition of a GSSP for the base of the Cambrian Series 3 and Stage 5. Further support for the correlation potential of the base of the range of Ovatoryctocara granulata comes from recent carbon isotope studies that indicate a striking negative excursion in sections of South China (ROECE event) that probably coincides with similar excursions in Laurentia. Four new trilobite species are described: Zacanthopsis blakeri sp. nov., Protoryctocephalus arcticus sp. nov., Eoptychoparia pearylandica sp. nov. and Onchocephalus? freucheni sp. nov.
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Peel, John S.
(författare)
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Uppsala universitetPaleobiologi
(creator_code:org_t)
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Ingår i:Bulletin of Geosciences: Czech Geological Survey86:3, s. 465-5341214-11191802-8225
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