Reinvestigation of the Cretaceous boundary fault in Sarqaqdalen, Nûgssuaq, central West Greenland

Abstract

A reinvestigation of the major fauIt in Sarqaqdalen was undertaken in 1988 in response to a renewed interest in the style and timing of the whole fault system that marks the easterly limit of Cretaceous sediments in central West Greenland. This interest stems in turn from the reinterpretation ofseismic lines from the 1970s that has recently been initiated in GGU (Chalmers, 1988; 1989). Dating of seismic sequences isinfiuenced greatly by what ean be learnt from the nearest onshore outcrops, for example proven unconformities in onshore sequences, and demonstrable relationships between sedimentation and fauIt movements.