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(Article of periodic en Anglais - 1988)

Document title

Nature and origin of corrugated ground moraine of the Des Moines lobe, Story County, Iowa

Authors(s) and Affiliation(s)

STEWART R. A. ; BRYANT D. ; SWEAT M. J. ;

Abstract

The nature of the till and related glaciofluvial sediments at each site suggests that the corrugation ridges formed in basal cracks or crevasses in the Des Moines lobe. The cracks are postulated to have formed during extending flow of the Des Moines lobe as it advanced toward its terminal position. Retreat of the Des Moines lobe was rapid enough to preclude significant accumulations of supraglacial sediment upon corrugated ground moraine

Source

Article of periodic

published at : Geomorphology

Editor :

Millesime : 1988, vol. 1, no2 [pp. 111-130]

Bibliographic references : 51 réf.

Language

Anglais

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