Trekk av isbevegelsen og isavsmeltningen i Nordre Gudbrandsdalens fjelltrakter.

Abstract

Glacial striae and ice-moulded forms indicate that the earliest direction of glacial flow was towards E, and that the flow at the maximum was towards N or NW. The late-glacial movement, however, seems to have been towards NE, in particular because the long axes in recently discovered drumlins have this orientation. The corresponding centre of active glaciation was situated in the northern part of the Jotunheimen high mountain area, at a time when the remaining ice, east of the investigated area, was climatically dead. The deglaciation period brought large amounts of melt water to the area. Magnificent clean-swept belts show the former water ways. During this stage considerable quantities of sand and gravel were carried to the valley bottoms successively. The transport history was partly complicated. A general tendency to subglacial transport and accumulation seems to have occurred in particular during the first phase, at a given place. Later, sublateral and\/or lateral transport, modifying the earlier accumulation forms, have taken place. On the mountain slopes sublateral drainage channels are common, in part cutting across earlier subglacial accumulations.