Evidence of glacial processes within the Lefroy Drainage System, Western Australia
Lynham, L., Knutsen, E., Smith, G., and Vaucher, R. (2026) Evidence of glacial processes within the Lefroy Drainage System, Western Australia. Australian Journal of Earth Sciences. (In Press)
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Abstract
Large-scale drainage systems traversing the Yilgarn Craton, Western Australia, have a long-debated mechanism of origin. In the northern parts of the Yilgarn Craton, direct evidence exists for their creation and fill by glacial processes (bed rock striations, polished pavements, infill of drainages by tillite), although similar evidence has not been recognised in the southern Lefroy Drainage System. This paper presents the first detailed evidence for glacially influenced sediments including pebbly diamictite, with preserved features suggesting glacial origin within the Lefroy Drainage System. This is based on data collected from field localities east of Lake Lefroy and describes the geological and paleoenvironmental history of these outcrops. Additionally, subsurface data are utilised to describe glacial morphologies from Lefroy Drainage System. These data support regional correlations of this scour and fill to other drainages across the Yilgarn Craton.
| Item ID: | 93426 |
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| Item Type: | Article (Research - C1) |
| ISSN: | 0812-0099 |
| Copyright Information: | © 2026 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Accepted Manuscript in a repository by the author(s) or with their consent. |
| Date Deposited: | 07 Aug 2026 03:17 |
| FoR Codes: | 37 EARTH SCIENCES > 3705 Geology > 370510 Stratigraphy (incl. biostratigraphy, sequence stratigraphy and basin analysis) @ 50% 37 EARTH SCIENCES > 3705 Geology > 370509 Sedimentology @ 50% |
| SEO Codes: | 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280107 Expanding knowledge in the earth sciences @ 100% |
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