View from US Highway 2 at the Marias Pass looking North. The Lewis overthrust fault runs along the junction between forest and paler upper levels to the right of the field. Precambrian sedimentary layers overlie younger Cretaceous layers.
Curly Bear Mountain at the eastern entrance to Glacier National Park. The Lewis Overthrust Fault extends (arrows) with Precambrian strata over Cretaceous layers.
The view from East of Glacier National Park overlooking Babb, MT towards Chief Mountain at the far right. The Lewis Overthrust fault continues from the left. Erosion has isolated Chief Mountain from the rest of the strata in the overthrust section.
Chief Mountain with Appekunny Formation and Altyn Formation deposits from the Protozeric Eon (1,600-800 MA) above a base of Cretaceous sediment (63 MA).
Singleshot Mountain with Appekunny over Altyn Formation.
Detail of Appekunny and Altyn formations on Singleshot Mountain. Appekunny contains siltite and argillite as well as white quartzite. Altyn formation is mostly limestone and dolomite with sandy layers.
Red Eagle Mountain and Lake St. Mary at sunrise along Going-to-the-Sun Road.
Wild Goose Island Viewpoint looking over St. Mary Lake and the surrounding glacier-carved valley.
Clements Mountain at the top of Logan Pass is composed of upper Shepard formation and darker lower Snowslip formation. An igneous sill (diabase at arrow) intrudes into the Helena formation.
At the top of Going-to-the-Sun Road looking along the western ridge (Garden Wall) which was carved by glaciers.
Looking upward to the top of the Garden Wall.
McDonald Creek passes through Prichard formation sedimentary layers.
