PointofInterestRoadSigns.com - Yellowstone National Park - Castle Geyser


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Yellowstone National Park - Castle Geyser


Location of sign - Upper Geyser Basin trail in Yellowstone National Park


Photo taken June 2008

Castle Geyser, Castle Geyser sign, Upper Geyser Basin Yellowstone National Park  

Close-up view of sign


Castle Geyser, Castle Geyser sign, Upper Geyser Basin Yellowstone National Park

Wide view of sign


Text of sign:


Castle Geyser


The massive cone is a sign of old age.  Eruption after eruption, probably for thousands of years, scalding water has deposited this

silica mineral formation.  By contrast, Old Faithful's fledgling cone may be only a few hundred years old.

Castle Geyser has dramatically changed its surroundings.  By flooding the area with hot silica-rich water, the geyser has devoured

part of a pine forest and turned it into a thermal desert.  Tree skeletons are entombed within the cone.


Castle Geyser's eruptions are predictable; two per day are typically recorded.

Thomas Moran painted this watercolor in 1872.  Vandalism has since destroyed some of Castle Geyser's original symmetry.


Walter Trumbull, a member of the Washburn expedition, sketched Castle Geyser in 1870.


Graphics on the sign


In addition to the text there is watercolor painting of Castle Geyser erupting painted by Thomas Moran in 1872.  There is also an

inset picture of Castle Geyser sketched by Washburn expedition member Walter Trumbull.


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