EXPLORATIONS AND SUHVE’fi 
R.R .ROUTE PROM THE MISSISSIPPI RIVER 
PACIFIC OCEAN . 
GEOLOGICAL MAP 
OF A PART OF THE STATE OF 
J^p|CPLORED-m’ 1853 BY 
LIEUT RS WILLIAMSON U. S. TOP. ENG? 
a are a to accompany me repor 
WILLIAM P . BLAKE 
GEOLOGIST OF THE EXPEDITION . 
LitJi of Sarorg?,Major&. Knapp 
M Y. 
San Jo 
and IMetamorpMc 
Erupted Granite and Svenite 
? and Porplrv'py 
Basaltic Lava ■ (Foundin ainbTr Jkmd^ 
Metmnorpliic Slates ^IneflyGlay-SlateA-dalcose Slate .(Jmiftroua., 
lex’tiarv (Horizontal strata on Ocqya (reek. 
