The nature and rate of weathering by lichens on lava flows on Lanzarote

Biogeomorphology. Special issue

Auteurs :
STRETCH, R.C.
VILES, H.A.
VILES, H.A.

Description :
Samples of lichen-covered and bare lava surfaces from Lanzarote, dating the 1730-1736 eruption, have been analysed using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) to investigate the relative roles of biological and inorganic weathering processes. Lichens here grow preferentially on N and NE facing surfaces and create a range of nanomorphological features as a consequence of their weathering activities. This research in Lanzarote, in comparison with the previous studies in Hawaii, provides a test for the climatic-control model.


Type de document :
Congrès

Source :
RGS-IBG meeting, Plymouth, Royaume-Uni, 2001-01, Geomorphology (Amsterdam), issn : 0169-555X, 2002, vol. 47, n°. 1, p. 87-94, nombre de pages : 8, Collation : Illustration, Références bibliographiques : 28 ref.

Date :
2002

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier