Origin and Mineralogy Glacial and Interglacial Clays of Southern Norway

I.Th. Rosenqvist
Institute of Geology, University of Oslo, P.O. Box 1047, Blindern, Oslo 3, Norway

Abstract: The Numedal River basin (6000 km2) in central and east Norway contains 3 × 109 m3 of clayey material, corresponding to a clay loam sediment, which contains 2 million tons of absorbed rare earth elements.

The clay mineralogy varies systematically from the till clays to a marine facies. It is concluded that the phyllosilicates of the clay fraction and tills originated from phyllosilicate minerals of the crystalline bedrock through a degradation partly due to preQuaternary weathering which dissolved a great part of the rock-forming minerals.

Clays and Clay Minerals; May 1975 v. 23; no. 2; p. 153-159; DOI: 10.1346/CCMN.1975.0230211
© 1975, The Clay Minerals Society
Clay Minerals Society (www.clays.org)