The Wilhelmøya Formation is a geologic formation in Svalbard, Norway. The marginal marine; concretionary, sideritic sandstones preserve indeterminate ichthyosaur and plesiosaur fossils dating back to the Rhaetian period.Kapp Koburg, Kongsøya at Fossilworks.org
See also List of fossiliferous stratigraphic units in Norway
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