PLATE N. 
ao 
Rolled volcanic 
gravel 15 eS 
Rolled 
Volcantec 
Gravel dO’ 
Gravel 185° 
Sea -level 
7700’ 
SECTION ACROSS GRAVEL AT OLD PACTOLUS AND CEMENT CLAIMS. 
SECTION AT MOONEY FLAT. 
SECTION AT MOONEY FLAT. 
ros 
Sia": 
J Peso! 
Ss 
SECTION AT PEARLS HILL. 
Sand 
and 
. ™~ 
.Y) : OH 
x S 8 tigi 
~ ™~ 
x ~ 2 Bed -Rock 
nN ~ ~ * 
2 S 3 N S 
4 z 8 = iS x SECTION AT BOSTON MINE. 
Ds) ~ S x > *® 
~ va) an can “ty ~ 
rey - -) iS} ~ = 
s ‘ : : < 
m SS —J SS = S 
/ é > S 
x - FS S ee £ > 3 Sa 
/ es ee ~ Si & 3 ¢ 
ee < < a < Fig.6 
oA - . S g 
1 S 
S 4 A, SS 5 
~ / . aa BSE a 
7 = S : = Y 
: : s Zave Spa 
x = N a = > . MOLVA ob ht > 
~ x nN 8 S > {O02 crs s 
3 > S S GEE SY ITE S 
x ~S GLY Ye f fp 4 ~~ 
Bed -VhE 4 CMLL, ey 
/ Z Sif 4 ae acim 
Sa he / Pe ty To 4 
eee v y Vv eS = A y Rock *#74 , MVAF PIG MEP > 4 LR re 
< 4 Miles > 
SECTION AT ALPHA. 
SECTION ACROSS GRAVEL FROM THE MIDDLE TO THE SOUTH YUBA. 
J. Bien lith NY. 
