Structural Geology – Active Tectonics
The Wallowa MountainsThe Wallowa Mountains rise along a fault zone just south of the town of Joseph.
Aerial view of Salton SeaAerial view of Salton Sea, with the approximate locations of the southern San Andreas and Imperial faults. Note how right-lateral slip on the two en-echelon faults drive extension between them.
Lemhi Range FaultingRecent faulting along western edge of Lemhi Range, Idaho.
Glacial valleys & frontal fault zoneGlacial valleys and frontal fault
Fault-bounded east front of Steens Mountain and Alvord Desert.Fault-bounded east front of Steens Mountain and Alvord Desert.
Black Mtns., Death Valley, CA, showing range-bounding fault andAerial view of Black Mountains and Copper Canyon turtleback (greenish rock on right).
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
Normal fault cutting Tertiary conglomerate, Mojave Desert, CA.Normal fault cutting Tertiary conglomerate, Mojave Desert, CA.
Headwall of a landslide: Cape Blanco, OregonHeadwall of a landslide: small normal fault offsetting uplifted Pleistocene marine gravels, Cape Blanco, Oregon. Continuation of uplifted marine terrace in background.
Crack-in-the-ground, a fissure developed along a normal fault in Central OregonCrack-in-the-ground, a fissure developed along a normal fault in central Oregon.
Fault-block Mountain and Desert SpringAbrupt fault-bounded east side of Steens Mountain, SE Oregon and water from spring.
