Supracrustal of pre-Ketilidian age (the Tartoq Group) and their relationship with Ketilidian supracrustals in the Ivigtut region, South-West Greenland

Abstract

The development of research in the Ivigtut region leading to the establishment of a pre-Ketilidian supracrustal sequence is briefly outlined. The stratigraphy of the Ketilidian supracrustals, the nature of the pre-Ketilidian supracrustals and the uncomformable relationship of the two sequences are described. The older supracrustals, the Tartoq Group, are shown to have suffered deformation, metamorphism and migmatisation in pre-Ketilidian time.