Glacial Esker Tails Off at Hudson Bay

Newfoundland: Perfect U-shaped Valley Carved by Glaciers

Rock Too Big To Move

Glacier NP: Sedimentary Rock Stratification Illustrated Seen Above Avalanche Lake

Most of the rock in Glacier NP is sedimentary, laid down in increments measured by tiny factions of an inch per year at the bottom of an ancient sea. It is hard to describe, and most photos don't do justice to, the depth of the layers and the geologic forces at work here that continue to lift and tip the rock.

This set of tipped shelves illustrates the extreme effects of geologic forces. Seen here is melt water from Sperry Glacier above Avalanche Lake.

Glacier NP: Classic U-shaped Valley

The long valley leading south-west from Logan Pass to Lake McDonald and West Glacier is a perfect illustration of the power of deep glaciers that shaped the modern terrain.