
Excelsior Geyser - Yellowstone National Park
Posted by:
Volcanoguy
N 44° 31.580 W 110° 50.242
12T E 512923 N 4930347
A history sign along the boardwalk trail in the Midway Geyser Basin of Yellowstone National Park.
Waymark Code: WMDYDJ
Location: Wyoming, United States
Date Posted: 03/08/2012
Views: 31
“In the 1880s Excelsior Geyser erupted in bursts 50 to 300 feet high. The thermal violence formed the jagged crater and apparently ruptured the geyser’s underground system, causing eruptions to cease after 1890.
On September 14, 1985, Excelsior roared back to life with forty-seven hours of major eruptions. It is impossible to predict when this dormant but powerful geyser’s next eruption will occur.
Though its eruptions have been erratic, the geyser’s outflow is nearly constant, pumping more than 4000 gallons of boiling water per minute over the crater rim into the Firehole River.”
Marker Name: Excelsior Geyser
 Marker Type: Rural Roadside
 Addtional Information:
 Group Responsible for Placement: National Park Service
 Date Dedicated: Not listed
 Marker Number: Not listed
 Web link(s) for additional information: Not listed

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Visit Instructions:
Please post a photo of you OR your GPS at the marker location. Also if you know of any additional links not already mentioned about this bit of Wyoming history please include that in your log.