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(Article of periodic en Anglais - 2012)

Document title

Lichenometric ages of the Little Ice Age moraines on King George Island and of the last volcanic activity on Penguin Island (West Antarctica)

Authors(s) and Affiliation(s)

ANGIEL P.J. (1 2) ; DĄBSKI M. (3) ;
(1) Dep. of Earth Sciences, Univ. of Western Ontario, Ontario, CANADA
(2) Dep. of Antarctic Biology, Polish Academy of Sciences, Warsaw, POLOGNE
(3) Dep. of Geomorphology, Fac. of Geography and Regional Studies, Univ., Varsovie, POLOGNE

Abstract

The goal of the study was to estimate ages of lichen colonization on the oldest moraines of the Ecology and White Eagle Glaciers on King George Island and on the Principal Cone of Penguin Island volcano. The first lichenometric studies on these islands from the late 1970s used rates that had about 4 to 5 times slower Rhizocarpon growth rates. The AA. re-examined the sites and measured 996 thalli diameters to establish the surface ages. According to these estimated growth rates, the ages of the oldest moraine ridges are of the Little Ice Age and were colonized at the beginning of the twentieth century. The mid-twentieth century age of lichen colonization on the historically active Penguin Island volcano might support the date of the last eruption reported by whalers in the end of the nineteenth and the beginning of the twentieth century

Source

Article of periodic

published at : Geografiska annaler. Series A. Physical geography / ISSN 0435-3676 / CODEN GAPGAP

Editor : Svenska sällskapet för antropologi och geografi, Stockholm - SUEDE (1965)

Millesime : 2012, vol. 94, no3 [pp. 395-412]

Bibliographic references : 3 p.

Collation : 7 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 2704 A

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/j.1468-0459.2012.00460.x

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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