PointofInterestRoadSigns.com - Yellowstone National Park - Tuff Cliff


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 Welcome to Point of Interest Road Signs! A collection of photos of road and trail signs.  Click here for more Wyoming Signs


Yellowstone National Park - Tuff Cliff


Location of sign - roadside in Yellowstone National Park between Madison and Fountain Flat Drive


Photo taken June 2008

Tuff Cliff, Tuff Cliff sign, Yellowstone National Park  

Close-up view of sign


Tuff Cliff, Tuff Cliff sign, Yellowstone National Park

Wide view of sign


Text of sign:


Tuff Cliff


Dense clouds of volcano ash once flowed across the land.  Rock fragments in the ash were so hot that they welded together and

flattened as they settled.  A series of such ash flows formed the light colored rock, a welded TUFF, exposed in the cliff above.

Water, frost, and roots erode the cliff today.  Severe earthquakes cause sudden rockslides.  The boulders around you are evidence

of the continual erosion of the cliff. 


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