Main Topsail hill, Central Newfoundland.

Steep, solitary rock knobs jut 100 m or more above generally flat terrain throughout Central Newfoundland. Called "tolts" in Newfoundland (and elsewhere as inselbergs and monadnocks), they are the remnants of a former higher landscape level which has all but since disappeared as the lower terrain was eroded flat by rivers and glaciers. The three tolts north of Buchans are called The Topsails (Main, Gaff, Mizzen) because, from a distance, they resemble the upper sails of a three-masted ship.

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