Yellowstone is famous for its geysers.
However it is also the site of several large calderas.
Located in the state of Wyoming but extends into Montana and
Idaho.
The most recent eruption has been estimated at 7410 BC.
The stamp illustrated below is from the National Parks Series
issued in 1934.
For more information on the volcano go to Volcano
World
Below, mint imperf pair of same stamp
The stamp below was issued in 1972
Gambia issued the following stamps for the centennial of the
Sierra Club in 1994
The following stamps are courtesy of Matthew Healey
Issued in 2003 by the United Nations
The next is Steamboat Geysir issued May 27th, 2006.
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