Pumice Castle - Prominent Geological Features of Crater Lake National Park
Of the many colorful volcanic formations in the walls surrounding
Crater Lake, The Pumice Castle, on the east wall, attracts the attention
of many
visitors.
The Pumice Castle is part of an extensive lenticular bed of
fragmental pumice outcropping on the crater wall about 1,300 feet above
the level of the lake, or 400 feet below the crater rim just south of
Cloudcap. The bed of pumice has a maximum thickness of 190 feet ... [The
Pumice Castle
, Nature Notes From Crater Lake, Vol. 11, No. 2, 1938]
Castle Rock, Crater Lake National Park, photo by
Robert Mutch
