Precambrian and Paleozoic Glaciation?
The effects of glaciers are well-dccumented in modern and Pleistocene sediments. Some Precambrian and Paleozoic sediments show some features similar to those of modern glaciation, but there is some controversy over whether the features are the result of glaciers, submarine landslides, lahars, turbidity currents, etc. Published in Origins v. 6, n. 1.