| DESCRIPTION OF MAP UNITS |
|
|
Dune sand |
 |
Alluvium |
 |
Stream channel
deposits |
 |
Fan deposits |
 |
Recent volcanic rocks
Qrvr-rhyolite
Qrva-andesite
Qrvb-basalt
Qrvp-pyroclastic rocks
|
 |
Lake
deposits |
 |
Glacial deposits |
 |
River terrace
deposits |
 |
Pleistocene marine
and marine terrace deposits |
 |
Pleistocene volcanic
rocks
Qpvr-rhyolite
Qpva-andesite
Qpvb-basalt
Qpvp-pyroclastic rocks
|
 |
Pleistocene
nonmarine |
 |
Plio-Pleistocene
nonmarine
|
 |
Quaternary and/or
Pliocene cinder cones |
 |
Upper Pliocene
nonmarine |
 |
Upper Pliocene
marine |
 |
Middle and/or lower
Pliocene marine |
 |
Pliocene volcanic
rocks
Pvr-rhyolite
Pva-andesite
Pvb-basalt
Pvp-pyroclastic rocks |
 |
Upper Miocene marine
|
 |
Oligocene nonmarine |
 |
Eocene nonmarine |
|
Tertiary marine |
 |
Tertiary intrusive (hypabyssal) rocks
Tir-rhyolite
Tia-andesite
Tib-basalt
|
 |
Undivided Cretaceous
marine |
 |
Upper Cretaceous
marine
|
 |
Lower Cretaceous
marine |
 |
Franciscan group |
 |
Franciscan volcanic
and metavolcanic rocks |
 |
Knoxville formation |
 |
Upper Jurasssic
marine |
 |
Middle and/or Lower
Jurassic marine |
 |
Triassic marine |
 |
Mesozoic granitic
rocks |
|
Mesozoic basic
intrusive rocks |
 |
Mesozoic ultrabasic
intrusive rocks |
 |
Jurassic-Triassic
metavolcanic rocks |
 |
Pre-Cretaceous
metamorphic rocks (ls=limestone) |
 |
Pre-Cretaceous
metasedimentary rocks |
 |
Pre-Cretaceous
metavolcanic rocks |
 |
Permian marine |
 |
Permian metavolcanic
rocks |
 |
Undivided
Carboniferous marine |
 |
Carboniferous
metavolcanic rocks |
 |
Mississippian marine
|
 |
Devonian marine |
 |
Devonian
metavolcanic rocks |
 |
Devonian and
pre-Devonian? metavolcanic rocks |
 |
Pre-Silurian
metasedimentary rocks |
 |
Pre-Silurian metavolcanic rocks
|
