The movement of the glacier pulls these frozen rocks away. Abrasion – rocks trapped in the glacier rub against the valley floor wearing it away like sandpaper. Eroded material, such as rock ...

The banks of the St. Lawrence near Brockville, and all the Thousand Islands, have been rounded and montonnee by glacial abrasion during tlie period when all this mass of ice was moving southward ...

Glaciation can lead to all kinds of geological ... shaped by particularly turbulent meltwater currents that concentrate abrasion and erosion in circular patterns. "When the meltwater eventually ...