Glaciation of the Upper Forth River Catchment,Tasmania

The Upper Forth Valley was glaciated on at least four occasions during the late Cainozoic. The two most extensive glaciations were no younger than early Pleistocene in age. During the last glaciation the limited ice catchment at the head of the valley nourished only a short valley glacier with separate glaciers forming in the tributary valleys to the west During earlier glaciations the Forth catchment was invaded by ice from the Mersey Valley to the east.