Nivation, River Grading, and Shoreline Development in South-East Iceland

THE Cambridge Iceland Expedition 1932 (I) enabled the writer to examine both the coastal and inland topography of South-East Iceland. The problems arising out of this visit which are to be discussed in this paper comprise three independent aspects of geomorphology, but they are here grouped together because the observations were made in the same region. Incipient Corries.-The mountains of South-East Iceland present a wealth of features which seem to be intermediate in form between those due solely to water action and those due to ice. There are a few mature glacial valleys, some of which still carry ice tongues fed by Vatnaj6kull, but the signs of true mountain glaciation with its valley steps, reversed slopes and corrie lakes are absent. Some of the valley heads are rounded but have the thalweg of a normal stream, others are V-shaped but yet too wide for simple stream erosion. A cursory glance might suggest that certain of them, at least, are normal water-worn valley heads, but in view of the prevailing steepness of grade this

Geography · Grading (engineering · Shore · Cryospheric studies and observations · Ecology · Geological formations and processes · Geology · Geology and Paleoclimatology Research · Oceanography

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