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(Article of periodic en Anglais - 1982)

Document title

Model for submarine glacial deposition

Authors(s) and Affiliation(s)

ORHEIM O. ; ELVERHOI A. ;

Abstract

Present-day sedimentary environments in the eastern Weddell Sea confirm low clastic sediment input from wide (> 100 km) ice-shelves. Mainly bioclastic sediments are formed in situ on the inner and shallow central-shelf areas (250 to 350 m water depth), with sedimentation rates probably < 0,01 m/ka. The coarse grained texture of these deposits is caused by removal of finer grades in suspension during settling of ice rafted debris sediments. Overconsolidated till was deposited < 31 000 BP during expansion of grounded ice to the shelf break. Subsequent eustatic rise caused grounded ice to float Frozen-on sediments melted out of the base of the ice, depositing soft pebbly mud above the till-Marine conditions similar to present-day conditions were found for 30 000 to 40 000 BP.

Source

Article of periodic

published at : Annals of Glaciology Cambridge

Editor :

Millesime : 1982, vol. 2 [pp. 123-128]

Bibliographic references : 23 réf.

Language

Anglais

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