Missouri River, Great Falls, Montana

 

Missouri River at Great Falls MT by GIOVANNI PACCALONI

Precambrian Belt Supergroup, Mesoproterozoic sedimentary rocks, Glacier National Park, Montana

 

Precambrian Belt Supergroup Mesoproterozoic sedimentary rocks, Glacier National Park, Montana by edk7

Hebgen Lake, Madison River Canyon, Montana, 1959

Montana 1959, M7.3 Earthquake by U.S. Geological Survey

Montana 1959, M7.3 Earthquake — On August 17, 1959, Hebgen Lake, Montana was shaken with a M7.3 quake, the largest earthquake to hit Montana. This earthquake caused 28 fatalities and about $11 million in damage to highways and timber. It is characterized by extensive fault scarps, subsidence and uplift, a massive landslide, and a seiche in Hebgen Lake.

 

The most spectacular and disastrous effect of the earthquake was the huge avalanche of rock, soil and trees that cascaded from the steep south wall of the Madison River Canyon. This slide formed a barrier that blocked the gorge and stopped the flow of the Madison River and, within a few weeks, created a lake almost 53 meters deep.

 Many summer houses in the Hebgen Lake area were damaged: houses and cabins shifted off their foundations, chimneys fell, and pipelines broke. In this photo we see the main residence of Hilgard Lodge that is almost wholly submerged in Hebgen Lake.
 Learn more at: on.doi.gov/Montana1959

Pryor Mountains, Carbon and Big Horn Counties, Montana.

 

Pryor Mountains by blackhawk32

Devil's Slide, Cinnabar Mountain, Gallatin National Forest, Park County, Montana

 

Devil's Slide by Tony Hisgett

 This distinctive formation can be viewed from Highway 89 and was created from alternate beds of limestone, sandstone, and quartzites that have been tilted to lie nearly vertical and have eroded at different rates.

Rocky Mountian Garden Wall, Glacier National Park, Montana

 

Rocky Mountian Garden Wall, Glacier NP, Montana by moonjazz

Calowahcon, Mission Range, Western Montana

 

Calowahcon's summit as sun goes down by Eugene Beckes

 

Beartooth Mountain, Beartooth Mountains, Montana

 

Beartooth Mt. & Missouri River by OldManTravels

Hebgen Lake, Gallatin County, Montana

 

Hebgen Memorial Day 2014 by mt rider

 This site is well known for the 1959 Hebgen Lake earthquake (magnitude 7.1 to 7.5) which occurred nearby on August 17, 1959, forming Quake Lake which is located immediately downstream.