Tagasi otsingusse
Grahn et al., 1994

Caradocian and ashgillian chitinozoan biostratigraphy of the Oslo‐asker and ringerike districts, Oslo region, Norway

Grahn, Y., Idil, S., Østvedt, A. M.
DOI
DOI10.1080/11035899409546178
Aasta1994
AjakiriGFF
Köide116
Number3
Leheküljed147-160
Tüüpartikkel ajakirjas
Keelinglise
Id4451

Abstrakt

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).

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