The Geology and Petrography of Crater Lake National Park, 1902
PART I.
MOUNT MAZAMA.
LAVAS OF MOUNT MAZAMA.a
ANDESITES.
CASTLE CREEK ANDESITE AREA.
On the western border of the rim north of Castle Creek is a hill of andesite much like that a short distance to the east, from which it is separated by a belt of glacial drift.
