A development of the lichenometric method applied to the dating of glacially influenced debris flows in southern Chile

Auteurs :
WINCHESTER, V.
HARRISON, S.

Description :
The development of a size frequency approach, previously used in attempts to resolve some of the problems, is described and applied to the dating of four debris flows marginal to the San Rafael Glacier in Southern Chile. The size frequency approach, bassed on new assumptions, uses parameters derived from population size frequency distributions of the lichen species Placopsis patagonica to provide relative and absolute dating for rock surfaces. Changes in the shapes of distributions suggest the relative age of populations. The size frequency approach appears to be particularly suitable for use on unstable debris flows.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 1994, vol. 19, n°. 2, p. 137-151, Collation : Illustration, Références bibliographiques : 23 ref.

Date :
1994

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