Portal de Periódicos da CAPES

Younger Dryas ice-marginal deposits in Trøndelag, central Norway

1975; Taylor & Francis; Volume: 29; Issue: 1 Linguagem: Inglês

10.1080/00291957508551973

1502-5292

J. L. Sollid, Leif Sørbel,

Geological formations and processes

Abstract Sollid, J. L. & Sørbel, L. 1975. Younger Dryas ice-marginal deposits in Trøndelag, central Norway. Norsk geogr. Tidsskr. 29, 1–9. Ice-marginal deposits in Trøndelag, central Norway, which in all probability belong to the Younger Dryas Chronozone (10,000 to 11,000 14C years B.P.), are mapped on the basis of morphological studies and analysis of air photographs. The position of the ice front at this time is reconstructed from Orkla's valley in the south to Heilhornet in the north, a distance of about 350 km (Fig. 1). The study concentrates on the area north of Trondheimsfjorden, where previous knowledge of these marginal deposits has been slight. The deposits form an almost continuous belt in Fosenhalvøya (the Fosen peninsula), but are more scattered in Ytre-Namdalen. Near Trondheimsfjorden the marginal formations in the valleys are deposited on older, locally very thick marine clays; the formations themselves consist of deltas, with partly overlying moraines composed mainly of glaciofluvial material redeposited by the glacier. The thick deposits are associated with the main lines of ice-directed drainage. Fig. 5 shows the Younger Dryas ice-marginal deposits of Fennoscandia as a whole.