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Grahn et al., 1994

Grahn, Y., Idil, S., Østvedt, A. M. 1994. Caradocian and ashgillian chitinozoan biostratigraphy of the Oslo‐asker and ringerike districts, Oslo region, Norway. GFF 116 (3), 147-160. | DOI | DETAILS

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ID4451
ReferenceGrahn et al., 1994
AuthorGrahn, Y., Idil, S., Østvedt, A. M.
Year1994
TitleCaradocian and ashgillian chitinozoan biostratigraphy of the Oslo‐asker and ringerike districts, Oslo region, Norway
JournalGFF
Volume116
Number3
pgs.147-160
Source typearticle in journal
LanguageEnglish
DOI10.1080/11035899409546178
Abstract

Caradocian and Ashgillian chitinozoans from eleven localities in the Oslo‐Asker and Ringerike districts (Oslo Region, Norway) are discussed. 32 species from 13 genera are encountered. The chitinozoan fauna displays pronounced affinities to those in Sweden and Estonia. The local stratigraphie ranges of the chitinozoans are established and compared with the Ordovician chitinozoan standard zonation of Balto‐scandia. Three hiatuses occur, viz. between the middle Keila Stage (Nakk‐holmen Formation) and the Oandu Stage (Solvang Formation), between the Oandu Stage and the Nabala Stage (Venst⊘p Formation), and in the upper Porkuni Stage (upper Lang⊘yene and Langåra Formations).