Animation of convergent plate motion. Transform - where the plates are sliding past one another, such as one sliding to the north and the adjacent plate sliding to the south. Animation of transform plate motion. If you could push the continents back together, the ancient climatic zones, as indicated by the rock types, would match up. Note directions of glacial ice movement as indicated by striations or grooves in the rock.
Glaciers start to form on continents from the buildup of snow.
As they grow through snow accumulation, they begin to move outwards. They do not form in the sea and move onto the land. Directions of glacial striations on the Gondwanaland continents only make sense if you could push the continents back together to form a single landmass in the past. The directions of glacial movement would not make sense in the absence of plate tectonics. Youth of ocean basins and sea floor .