surface-planes

Updated: May 6, 2025

We still detect the grooves and scorings on the rock-surfaces where they have been protected by a coating of boulder clay; and we still find the surface strewn with the blocks and débris of that mighty ice-flood. But whatever may have been the amount of erosion caused by the great ice-sheet, it was chiefly confined to the more or less horizontal surface-planes.

Edward Hull - Volcanoes: Past and Present