Grotto Geyser

Yellowstone's Upper Geyser Basin Grotto Geyser.

 

Grotto Geyser is perhaps the most unusual of Yellowstone’s geysers. Geologists believe that hundreds (or thousands) of years ago, Grotto Geyser emerged in a stand of dead or dying trees and, through time, deposited layer upon layer of siliceous sinter (silica) over the stumps and branches.

 

You can get a feel for it's size with the approaching hikers on the right adding some scale.

 

Another angle on this special geyser in the comments.

 

Thanks for taking a look!

Have a marvelous Monday!

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