Volcanic Calderas
N 44° 11.028 W 111° 26.183
12T E 465121 N 4892380
Idaho Historical Marker 396 located along Highway 20 in Fremont County, Idaho.
Waymark Code: WM3Y3T
Location: Idaho, United States
Date Posted: 06/03/2008
Views: 51
The marker text reads as follows: "Some 2,000,000 years ago massive eruptions of hot rock boiled for 60 miles from this high rim on across Yellowstone Park. An exceptionally large crater remained when that lava surface collapsed. Another smaller caldera followed north of here about 1,300,000 years ago. Yellowstone's geysers and hot springs continue to spout as remnants of those volcanic displays formed as underground rock gradually moves westward across a tremendous source of interior heat."
Marker Name: Volcanic Calderas
Marker Type: Roadside
Marker Text:
Some 2,000,000 years ago massive eruptions of hot rock boiled for 60 miles from this high rim on across Yellowstone Park. An exceptionally large crater remained when that lava surface collapsed. Another smaller caldera followed north of here about 1,300,000 years ago. Yellowstone's geysers and hot springs continue to spout as remnants of those volcanic displays formed as underground rock gradually moves westward across a tremendous source of interior heat.
County: Fremont
Group Responsible for Placement: Idaho Transportation Department
Marker Number: 396
Web link(s) for additional information:
City: Not listed
Date Dedicated: Not listed
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Visit Instructions:
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