I think there are some results of that. For instance, the sea level was lower than at present, due to the large volume on moisture trapped as ice on the land, glaciation extended beyond present continental shorelines. Separate centers of now accumulation and ice formation developed. Large lakes were created between the western mountains of North America and the advancing ice front. To the south, huge rivers carried away glacial meltwaters.
Still not sure
Additional answer
Mountain ranges were not made by glaciation. They were pushed up by the movement of tectonic plates - although they may have been susequently shaped by glaciers
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