Obsidian Cliff

Obsidian Cliff (HM1KP9)

Location: Yellowstone National Park, WY 82190 Park County
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Country: United States of America
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N 44° 49.44', W 110° 43.752'

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Inscription

Volcanic Glass

Yellowstone Plateau glowed red from volcanic activity, with molten rock welling up and spreading from numerous fissures. Obsidian Cliff, a 180,000-year-old lava flow, is part of the evidence. Cooling and shrinking, the lava solidified into large columns visible at the base of the cliff.
Obsidian is a rock of high silica content with few visible crystals. By contrast, Golden Gate, 10 miles north, cuts through a lighter-colored flow of welded ash. The two formation are chemically identical but look different because they cooled under different conditions. Yellowstone's cliffs and canyons are charged with invisible movement: a sense of fiery, dynamic origin and gradual but unmistakable cracking and crumbling over time.
Details
HM NumberHM1KP9
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Marker ConditionNo reports yet
Date Added Saturday, May 23rd, 2015 at 10:04pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)12T E 521408 N 4963434
Decimal Degrees44.82400000, -110.72920000
Degrees and Decimal MinutesN 44° 49.44', W 110° 43.752'
Degrees, Minutes and Seconds44° 49' 26.4" N, 110° 43' 45.12" W
Driving DirectionsGoogle Maps
Area Code(s)307
Closest Postal AddressAt or near US-89, Yellowstone National Park WY 82190, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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