The "Big Pumice Cut" as seen from highway 395.  The lowermost vegetation-covered layer is highly weathered, bouldery,
Sherwin Till.  This is overlain by a gently-dipping, 9-15 foot thick layer of well-sorted air fall tuff.  Overlaying the air fall tuff is
a much thicker ash flow tuff with horizontal bedding.  At the very crest of the hill is a thin layer of outwash gravel.  Several
prominent "clastic dikes" cut the tuff layers.