SHEET No. 23 
WASHINGTON | 
BULLETIN 611 
EXPLANATION 
D Clay and sand (Ellensburg formation)| Tertiary 
} (Miocene) 
ie 
ty 
E. Lava flows (Yakima basalt) 
er ms Lea ee 
o— Mieanar 
Pia emmer & 
120° 1s? Hi6® 
T/ 
PKR SS, ae.'S 
7 ii 
\ . 
rr | 
} y 
| 2 ae 8 
. rio 
NAS Se ~ WOR _.# 
SS Rispokene | | if ~ Ge. Schrags ING” 
SW ee ine pyr” i 
WAS 23! 7 \ or 
SEL ARR eA 1" 7 BS 
| om SSS MW Wwe AA : + nee cates 
\ ; Syn bitio Fes RENT ’ ‘5 ~ Le } ce aha 
2) ; NS = tvipgstox D \ per ELS STE = 
\ | 4] ae eS Ee age ly 
\\ ip 4! es 4ag & & 
se PPAUl g 
oxboro oe Fon + 
We 6 EL. 422 ry 
= \ LAs 
Pym ™ 
rovidence / 
0° L/S%3 : 
a 4 os 1 
+ . ic 2 
Dt pene NEL 
iY 1600 a Dei ve \ Pn 
. be 7 a : pice 
Hit oes ae 
/ iB \ i h Vv VW / 
( unningham ~ : : 
1 VBP ELr7s — : 
Scale 500,000 f A a } / 
' Approximately 8 miles to | inch q ye . are: 
a) 1 5 i) 165 iH e Le 
it ed ee Pe ee Hy lHattor : 
} Lh, at , £L./072 see J : 
a) 1 20 2 A & 
THE GREAT LAVA PLATEAU OF COLUMBIA RIVER, STRETCHING SOUTHWARD ACROSS OREGON a | ee ME Fics scion Or a ft we 
AND EASTWARD NEARLY TO YELLOWSTONE NATIONAL PARK Contour interval 200 feet * Af ee 
ELEVATIONS IN FEET ABOVE MEAN SEA LEVEL Weioss * a7 —— 
The di ft St. Paul, Minnesota. h 10 ee ea 
The ¢rossties on the railroads are spaced | mile apart | egal 
wu Fe 
‘BConnell “ 
40 EL.845 
a P -- - alr’ Shins rox 
16 
actus 
720 & 
& 
Se 
Ae 
19°30" seco 
