"You also see what we call glacial striations and these look like scratches. They're little, little lines across the rock that formed as the ice was moving over the rock." Central Park is littered ...

These hummocky features come in all sizes from a few metres to hundreds of metres in length and are popular with skiers, ...

The chief object of his investigation was to discover the effects of glacial ... seratchings and striations which are so peculiar to rocks and stones that have been abraded by ice, all along ...