(Article of periodic en Anglais - 2010)

Document title

Beach ridge geomorphology at Cape Grinnell, northern Greenland : a less icy Arctic in the Mid-Holocene

Authors(s) and Affiliation(s)

MASON O.K. (1) ;
(1) Geoarch Alaska, Anchorage, ETATS-UNIS


The chronology of uplifted beach ridges is constrained by 10 geological 14C ages on shell and sea mammal bones and 11 upper limiting ages from archaeological sites that span the last 3,000 years. Beach ridges formed under the influence of open water storms with renewed frequency and intensity ca. 3 ka and 1 ka ago. A lack of shell may reflect cooler sea surface temperatures. The presence and absence of ice can be inferred by push-features. Three intervals of heightened precipitation produced extensive fan deltas. Active solifluction lobes and colluvia cover beach ridge deposits that are between 9 and 7 ka old


Article of periodic

published at : Geografisk tidsskrift / ISSN 1903-2471

Editor : Det Kongelige Danske Geografiske Selskab, Kobenhavn - DANEMARK (2009)

Millesime : 2010, vol. 110, no2 [pp. 337-355]

Bibliographic references : 87 ref.

Collation : 8 fig., 2 tabl.




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