Emerged sea stack and wave-cut platform, Western Newfoundland.
About 13000 years ago, the margin of the Newfoundland ice sheet had retreated inland from Gulf of St. Lawrence and sea level stood about 27 m higher than present. Wave action at that time produced a sea stack (foreground) and cut a rock platform on the headlands (far left). Melting of the ice sheet allowed the land to rebound from the sea, leaving the shore features high and dry.

© 1998, Geological Survey of Canada, Natural Resources Canada.