Evidence for freeze-thaw events and their implications for rock weathering in northern Canada

Auteur :
HALL, K.

Description :
In order to assess the weathering regime at a site in northern Canada, temperatures were collected at the surface, 1 cm and 3 cm depth for sets of paving bricks, with exposure both vertical and at 45°, orientated to the 4 cardinal directions. Temperature data were collected at 1 min intervals for 1 year. These data provide unequivocal proof for the occurrence of the freezing and thawing of water on and within the rock (freeze-thaw events). It was found that the temperature at which freezing occured varied significantly through the year. The change in freeze temperature is thought to be due to the chemical weathering of the material.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2004, vol. 29, n°. 1, p. 43-57, nombre de pages : 15, Collation : Illustration, Références bibliographiques : 36 ref.

Date :
2004

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