Structural Geology – Active Tectonics

The Wallowa MountainsThe Wallowa Mountains rise along a fault zone just south of the town of Joseph.

Glacial valleys & frontal fault zoneGlacial valleys and frontal fault

Boulders on alluvial fan, Death Valley, California.Boulders on alluvial fan, Death Valley, California. The canyon, at the apex of the fan, can be seen in the background. It is a wineglass canyon, formed by erosion of an actively rising mountain next to a fault zone.

Normal faults in Lewis Thrust fault zone, Glacier National ParkNormal faults extend the upper plate of Proterozoic rock of the Lewis Thrust. Montana's Rocky Mountains