The formation of ice caused by the snow that fell did not melt. To cause to become the glaciers and ice melt will cause it to be moved and debris bearing sandstone. The cause is a hill or Lake.
The formation of ice caused by the snow does not melt. Make a glacier When the ice melts, it will be moved and it carries with sandstone fragments. Causing the hills or the lake.
The formation of ice caused by snow insoluble became a glacier. And when the ice melts, it will move and it is carrying debris sandstone with, causing a hill or a lake.