The Withington Caldera

The Withington Caldera (HM22FA)

Location: Salmon, ID 83467 Lemhi County
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Country: United States of America
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N 45° 0.227', W 113° 37.938'

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Inscription

Lewis and Clark in Lemhi County

About 50 million years ago, this was one of the most violent landscapes on Earth. A sub-surface mass of molten rock rose and subsided in cycles, spewing gas, mineral fragments and ash in explosions hundreds of times more powerful that an atomic bomb. When it was all over, igneous rock thousands of feet thick covered the land and there was a broad, shallow crater or caldera across the valley from this site.
Geological forces that created the Beaverhead Mountains behind you the and Lemhi Range before you buckled the caldera beyond recognition but the rock it created is still visible.
Details
HM NumberHM22FA
Tags
Placed ByBureau of Land Management
Marker ConditionNo reports yet
Date Added Tuesday, October 31st, 2017 at 7:01pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)12T E 292548 N 4986741
Decimal Degrees45.00378333, -113.63230000
Degrees and Decimal MinutesN 45° 0.227', W 113° 37.938'
Degrees, Minutes and Seconds45° 0' 13.62" N, 113° 37' 56.28" W
Driving DirectionsGoogle Maps
Area Code(s)208
Which side of the road?Marker is on the right when traveling West
Closest Postal AddressAt or near 60 Warm Springs Rd, Salmon ID 83467, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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