The weathering of granodiorite porphyry in the Thiel Mountains, inland Antarctica

Auteurs :
ISHIMARU, S.
YOSHIKAWA, K.

Description :
The weathering of granodiorite porphyry is examined in the extremely cold and dry environment of the inland part of Antarctica. Weathering features include granular disintegration, rock varnish, and sheeting. Sheeting has gradually proceeded since the exposing of the nunatak, but the other types of weathering have not actively advanced in recent times. Sheeting has precipitated rock falls, and has gradually formed a gray mosaic on the varnished wall. The sheeting was caused by gravitational body force, which is internal stress of the rock body due to the mass of the oberburden.


Type de document :
Article de périodique

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2000, vol. 82, n°. 1, p. 45-57, Collation : Illustration, Références bibliographiques : 60 ref.

Date :
2000

Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi