Ferromanganese rock varnish in north Norway : a subglacial origin
Auteurs :WHALLEY, W. B.
GELLATY, A. F.
GORDON, J. E.
HANSOM, J. D.
Description :
A thin, dark brown rock varnish is described from ice-smoothed bedrock on the forefield of a glacier in North Norway. Glacier retreat rates indicate that the varnish has remained exposed subaerially at the surface for about twenty years, and its restricted occurrence suggests that it is not of biological origin but rather is essentially authigenic. Possible subglacial origins for associated iron and silica precipitates are also suggested.
Type de document :
Article de périodique
Source :
Earth surface processes and landforms, issn : 0197-9337, 1990, vol. 15, n°. 3, p. 265-275, Références bibliographiques : 50 réf.
Date :
1990
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)