Mapping in the Umanak district, central West Greenland

Abstract

Publication of 1:100000 geological maps from central West Greenland has reached a stage when five maps have been issued, and a sixth is in an advanced stage of preparation. However, until the summer of 1978, one of the most readily accessibie areas in this part of Greenland - that around and east of Umanak - had not been mapped in greater detail than required for the production of the 1:500000 sheet Søndre Strømfjord - Nfigssuaq. Consequently it was decided that the writer, together with a group of senior students from the Institute of General Geology, Copenhagen University, should remap the area over a period of three seasons with a view to preparation of the 1:100000 sheet 70 V.2 Nord - Agpat. This work was started in the 1978 field season when in all four geologists, each with an assistant, were in the fieid. The areas in which the individual geologists worked are shown in fig. 9. Mapping was carried out on enlargements of vertical aerial photographs provided by the Geodetic Institute, the 1:50000 topographic sheets being unsuitable for detailed mapping. Logistic support was provided by the GGU cutter N. V. Ussing, with Flemming Nielsen as skipper.