Sedimentological characteristics indicative of a glacial origin when observed in South Australian diamictites (from Coats and Preiss, 1987):
Presence of dropstones in associated laminites, indicating ice rafting
Presence of polished, facetted, striated and grooved clasts
Variable clast lithology, with certain lithologies persisting over large areas
Distinctive facies that recur in variable successions
Wide range of grainsize, including boulders
Very poor sorting