Mount St. Helens National Volcanic Monument
Mount St. Helens.
About This DestinationAt 8:32 Sunday morning, May 18, 1980, Mount St. Helens erupted, shaken by an earthquake measuring 5.1 on the Richter scale, the north face of this tall symmetrical mountain collapsed in a massive rock debris avalanche. In a few moments this slab of rock…
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La Garita Mountains grew from volcanic explosions 35 million years ago
The Wheeler Geologic Area on the Rio Grande National Forest offers a glimpse into a violent volcanic past with hoodoos and multi-colored tuff that has been slowly eroding for millions of years. (USDA Forest Service Photo by Michael Blakeman)
Looking out over the La Garita Wilderness Area in Southwest…