Experimental frost and salt weathering of chalk-II

Auteurs :
JERWOOD, L. C.
ROBINSON, D. A.
WILLIAMS, R. B. G.

Description :
Experiments are described in which chalk cubes were soaked in solutions of either sodium chloride, sodium sulphate, or magnesium sulphate. After removal of excess liquid, the cubes were subjected to six freeze-thaw cycles with temperatures ranging from either + 15 to - 10o C or + 15 to - 30o C. The results confirm that frost weathering can be enhanced by the presence of certain salts. Evidence is presented which suggests that salt crystallization is the major weathering process operative when non-immersed samples are frozen but a combination of frost and salt weathering operates when fully immersed samples are frozen.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 1990, vol. 15, n°. 8, p. 699-708, Références bibliographiques : 15 réf.

Date :
1990

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley