Stratigraphy and structure of eocambrian and younger deposits in a part of the Gudbrandsdal valley district, south Norway.

Abstract

A sequence of five separable formations of assumed Eocambrian to Cambrian and earliest Ordovician age are separated by a thrust-plane from the overlying Otta nappe. A lowermost formation of alternating schists and sandstones (often calcareous or dolomitic) and dolomites contains boulder-bearing schists, correlated with Eocambrian glacial horizon of south Norway (Moelv tillite). It is succeeded by a light feldspathic sandstone (\"light sparagmite\") a formation of alternating schists and sandstones (often calcareous or dolomitic), a thick pelitic sequence (phyllites) and an uppermost sandstone. In the eastern part of the area described on the rocks of this sequence are folded on NW-SE axes, two phases of folding have been ascertained, in the western part the structure is largely monoclinal with dips to NW to NNW.