NJG69-3-02
1989
The Upper Ordovician-Lower Silurian rocks in the Os area, Major Bergen Arc, Western Norway
69
3
163-175

The two younger Ashgillian-Llandoverian sedimentary sequences in the Os area, the Holdhus and the Ulven Groups, have been correlated and are now collectively named the Os Group. The group is divided into five formations: the Skarfjell, Vaktdal, Hegglandsdal, Valla and Moberg Formations. No structural/metamorphic break is found between any of the formations, and the Os Group is claimed to represent a continuous sedimentary sequence related to transgression and regression in a shallow marine to beach environment.

0029-196X
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