Late Llandovery and early Wenlock stratigraphy and ecology in the Oslo Region, Norway

Leonard Robert Morrison Cocks, David Worsley
1993 Bulletin of the British Museum (Natural History).  
Synopsis. New fossil collections and field work in all parts of the Oslo Region in rocks of middle and late Llandovery and early Wenlock ages have led to a reassessment of the stratigraphical units, including the erection of a new Porsgrunn Formation of late Llandovery age in the Skien, Porsgrunn and Holmestrand districts. The fossils used for dating are reviewed in turn, with new graptolite records and new finds recorded of the age-diagnostic brachiopod Eocoelia sulcata. Many faunal
more » ... and animal communities have been recognised, most of which are known from Britain, Canada and elsewhere. The new strophomenacean brachiopod genus Erinostrophia is erected, with type species Orthis undata M'Coy, 1846. Analysis of the deepening and shallowing of the animal communities, combined with a review of the sequence stratigraphy, leads to a recognition that, in addition to the variable influences of global eustatic changes, the more local isostatic responses to contemporary nappe emplacement were more important in controlling the depths and facies.
doi:10.5962/p.313804 fatcat:nbualv4kdjgcjhmdna5doh5nza