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Grove fraktie analyses en SEM waarnemingen aan vier sedimentkernen uit de Noorse Geul ter hoogte van Egersund
Paauwe, E.F.W. (1979). Grove fraktie analyses en SEM waarnemingen aan vier sedimentkernen uit de Noorse Geul ter hoogte van Egersund. Interne verslagen Nederlands Instituut voor Onderzoek der Zee, 1979(11). NIOZ: Texel. 70 pp.
Deel van: Interne verslagen Nederlands Instituut voor Onderzoek der Zee. Nederlands Insituut voor Onderzoek der Zee: Texel.
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| Abstract |
In the Norwegian Channel off Egersund four Piston cores were taken from sediments of Late-Post Weichselian age. Of the adjoining part from the less deep North Sea-bottom and the slope between these areas six grab samples were taken. The samples were examined sediment petrographically and described by means of the so called Coarse Fraction Analysis. It was demonstrated that the differences in water depth between the sample areas is expressed in the content of quartz and feldspar, stone fragments, mica, iron-coated quartz grains, authigenic pyrite and benthonic Foraminifera. The presumably more intense turbulence in the less deep area is assumed to be responsible for these differences. From the top and bottom of each piston core about 15 quartz grains were selected for SEM study. Three different types of quartz grains could be distinguished and it was found that in all cores the same trends occurred; an upward decreasing influence of glacially and eolian transported quartz grains and upwards increasing influence of littorally transported quartz grains It was assumed that this represents the effect of rising sea-level during and after withdrawal of the ice-cap that covered the examined area during the last phase of the Weichselian. |
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