Geological Map of East Greenland 72°-76° N. lat. (1:250,000).

Abstract

The Geological Map of East Greenland, 72°-76° N lat. (1 :250,000), is the culminating result of LAUGE Koch’s expeditions from 1926 to 1958. A representative segment of the East Greenland Caledonides dominates the map area. Orogenic activity climaxed in the late Silurian, waned through the Devonian and terminated in the Permian. Deposition of post-Caledonian shelf sediments began with the transgression of the Upper Permian and continued with a few breaks into the Upper Cretaceous. During this period tensional tectonics gradually broke up the shelf into a series of antithetically rotated fault blocks. Regional uplift and erosion initiated the early Tertiary history of East Greenland which was swiftly followed by the eruption of plateau basalts, the intrusion of dykes and sills, and the emplacement of plutonic centres.