Steven, Thomas August, 1917-
Steven, Thomas August, 1917-
Lipman, Peter W.
Geological Survey professional paper ; 958
Calderas of the San Juan volcanic field, southwestern Colorado : eighteen major ash-flow tuff sheets were deposited and perhaps as many related calderas developed during emplacement of an underlying shallow batholith in late Oligocene time
Calderas of the San Juan volcanic field, southwestern Colorado : eighteen major ash-flow tuff sheets were deposited and perhaps as many related calderas developed during emplacement of an underlying shallow batholith in late Oligocene time
Calderas of the San Juan volcanic field, southwestern Colorado :
Steven, Thomas August, 1917-