Establishing lichenometric ages for nineteenth- and twentieth-century glacier fluctuations on South Georgia (South Atlantic)

Lichenometry in subpolar environments. Special issue

Auteur(s) et Affiliation(s)

ROBERTS, S.J.

British Antarctic Survey, Cambridge, Royaume-Uni

HODGSON, D.A.

British Antarctic Survey, Cambridge, Royaume-Uni

SHELLEY, S.

British Antarctic Survey, Cambridge, Royaume-Uni

ROYLES, J.

British Antarctic Survey, Cambridge, Royaume-Uni

Dep. of Plant Sciences, Univ., Cambridge, Royaume-Uni

GRIFFITHS, H.J.

British Antarctic Survey, Cambridge, Royaume-Uni

DEEN, T.J.

British Antarctic Survey, Cambridge, Royaume-Uni

THORNE, M.A.S.

British Antarctic Survey, Cambridge, Royaume-Uni

BRADWELL, T.

British Geological Survey, Edinburgh, Royaume-Uni

Description :
As part of a reconnaissance study in Prince Olav Harbour (POH), South Georgia, the AA. measured the size of lichens (Rhizocarpon) on ice-free moraine ridges around 2 small mountain cirques. Their aims were twofold : first, to provide age estimates for lichen colonization, and hence, deglaciation of the moraine ridges, and second, to examine the potential of applying lichenometry more widely to provide deglacial age constraints on South Georgia. The AA. use long-term Rhizocarpon lichen growth rates from recent studies on sub-Antarctic Islands and the western Antarctic Peninsula to calculate likely age estimates. Results and discussion.

Type de document :
Article de monographie

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2010, vol. 92, n°. 1, p. 125-139, nombre de pages : 15, Références bibliographiques : 1,5 p.

Date :
2010

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

Langue :
Anglais