Morphology and age of bouldery landslide deposits in forested dolerite terrain, Nicholas Range, Tasmania

Auteur(s) et Affiliation(s)



Description :
Three exposure ages in the range 80-90 ka, obtained from large dolerite boulders, indicate landslide movement during the last interglacial period; as the deposits show no evidence of movement since first accumulating the deposits must have formed under conditions different from those presently prevailing. The AA. suggest that water-saturation at the contact of the dolerite slope deposits and the sedimentary rocks below, following seasonal snow melt in a period colder than at present, may have initiated instability. The risks associated with land use such as forest harvest on these and similar deposits elsewhere are considered to be low.


Type de document :
Article de périodique

Source :
Zeitschrift für Geomorphologie, issn : 0372-8854, 2011, vol. 55, n°. 3, p. 383-393, nombre de pages : 11, Références bibliographiques : 25 ref.

Date :
2011

Editeur :
Pays édition : Allemagne, Stuttgart, Gebruder Borntraeger