Nordfjordeid. Beskrivelse til kvartærgeologisk kart 1218 I - M 1:50 000 (med fargetrykt kart).

SKRIFTER
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71
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Forfattere
Klakegg, Ove
Nordahl-Olsen, Torkill
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Utgivelsesår
1985
Publikasjonstype
Utgivelsesår
1985
Summary
The superficial deposits and their morphological features within the area of map-sheet Nordfjordeid, western Norway, are classified and described. Ice movements and the course of the deglaciation are reconstructed. The oldest ice movements had a flow direction towards N and NNW almost independent of the underlying topography. Younger ice movements were directed by the fiords and valleys with flow directions mainly towards W. The deglaciation of the area took place in Allerød and Younger Dryas (11,800-10,000 B.P.), interrupted by two readvances: the Vardehaug moraines (10,700-10,600 B.P.) and the Nor moraines (10,500-10,000 B.P.). Outside the area covered by the inland ice cirque glaciers and glacier caps developed in Y. Dryas, indicating a glacial level limit 650 m lower than today. The Nor level is the most distinct marine level in the area having a dip of 1,4 m/km towards WNW. Tills are subdivided according to thickness and occur mostly where metwater reached the sea at the time of deposition, c. 40-70 m a.s.l. Fluvial deposits are found along rivers and mainly as reworked glaciofluvium in the area between the glaciofluvial deposits and the present sea-level. Marine deposits, mainly found in Eidsdalen and along the sides of the fiords, are deposited in areas which were submerged during the deglaciation. Weathered material is present mainly in areas higher than 1000 m a.s.l. Fluvial deposits are found along rivers and mainly as reworked glaciofluvium in the area between the glaciofluvial deposits and the present sea-level. Marine deposits, mainly found in Eidsdalen and along the sides of the fiords, are deposited in areas which were submerged during the deglaciation. Weathered material is present mainly in areas higher than 1000 m a.s.l., and rapid mass-movement deposits found at the base of the steep hills and valley sides.
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