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.