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Evidence of a Late Pre-Cambrian Glaciation in the Kimberley Region of Western Australia

Published online by Cambridge University Press:  01 May 2009

D. B. Dow
D. B. Dow
Affiliation:
Bureau of Mineral Resources, Geology and Geophysics, P.O. Box 378, Canberra City.
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Abstract

Sediments of late Pre-Cambrian age mapped in the Kimberley Region of Western Australia have all the characteristics of tillite, and their glacial origin is confirmed by: the presence of very large polished and striated erratics, the great diversity of megaclasts, their regional extent, and the presence of striated, grooved, and polished quartzite bedrock directly beneath the tillite.

Faceted and flat-iron-shaped pebbles are rare or absent; most megaclasts tend towards an ellipsoidal shape—an observation in agreement with recent theories of glacial abrasion.

Type
Articles
Information
Geological Magazine , Volume 102 , Issue 5 , October 1965 , pp. 407 - 414
Copyright
Copyright © Cambridge University Press 1965

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References

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