Radiocarbon chronology of Ross Sea drift, eastern Taylor Valley, Antarctica : evidence for a grounded ice sheet in the Ross Sea at the Last Glacial Maximum

Glacial and paleoclimatic history of the Ross ice drainage system of Antarctica. Special issue

Auteurs :
HALL, B.L.
DENTON, G.H.

Description :
More than 250 radiocarbon dates of lacustrine algae and marine shells afford a chronology for Ross Sea drift in eastern Taylor Valley. Four major drift sheets in eastern Taylor Valley are differentiated. Evidence from ice-dammed lakes in Taylor Valley and from shells from McMurdo Sound suggests grounding-line retreat from the vicinity of Ross island between 6500 and 8340 C 14 yr BP. Rising sea level may have triggered internal mechanisms within the ice sheet that led to retreat, but did not in itself drive continued ice-sheet recession. Ice retreat, once set in motion, continued in the absence of sea-level forcing.


Type de document :
Article de monographie

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2000, vol. 82, n°. 2-3, p. 305-336, nombre de pages : 32, Collation : Illustration, Références bibliographiques : 47 ref.

Date :
2000

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