Lowermost Ordovician sandstones in central North Greenland

Abstract

A prominent cliff-forming white sandstone occurs within the thick sequence of Cambro-Ordovician carbonate sediments in western North Greenland. The unit has been traced from Nares Land to Warming Land, attaining a maximum thickness of 53 m, and is here named the Permin Land Formation. A thinner sandstone (maximum thickness 15 m) occurs within the upper part of the Cass Fjord Formation of Daugaard-Jensen Land and is named the Kap Coppinger Member of that formation. These units are considered to be coeval and of early Ibexian (earliest Ordovician) age.