Front:
© 34190-GROTTO GEYSER, YELLOWSTONE NATIONAL PARK
COPYRIGHT BY HAYNES INC., YELLOWSTONE PARK, WYOMING
5A-H529
Back:
Grotto Geyser erupts 20 to 30 feet high
during its one-hour displays which occur
usually at intervals of from 2 to 8 hours. The
unusual form of its cone has led to the spe-
| culation that it may have been built around
the roots of an overturned tree.
COPYRIGHT BY HAYNES INC., YELLOWSTONE PARK, WYOMING, U.S.A.
