GEOLOGIC AND TOPOGRAPHIC MAP 
NORTHERN PACIFIC ROUTE 
From St. Paul, Minnesota, to Seattle, Washington 
UNITED STATES GEOLOGICAL SURVEY 
GEORGE OTIS SMITH, DIRECTOR 
David White, Chief Geologist R. B. Marshall, Chief Geographer 
1915 
Each quadrangle shown on the map with_a in parenthesis in the 
, lower left corner is mapped in detail on the U. S. G. S. Topographic 
Sheet of that name. ; 
2 £ ae 
. 2 ‘ MILES 
MAP SHOWING DEPTH OF WATER IN ELLIOTT BAY , SEATTLE 
Th 
diet: 
Scale 300,000 S 
Approximately 8 miles to 1 inch 
1 
re 
BULLETIN 611 
SHEET No. 27 
mt 
_ 19 Miles 
ms 
io 3 10 ib Kilometers 
Contour 
ELEVATIONS IN F) 
"7 ce, 
Paul, 
intery 
EET A 
Min. 
BOVE MEAN SEA LEVEL 
al 200 feet 
hy a 
The crossties on the railroads are spaced ! mile apart 
ee ON 
Tr ee 
rN 
Ss Ny 
“ye eke | 
1A uy 
ie 
ofS 
22° WASHINGTON 
EXPLANATION 
Loose surface materials 
A . Stream deposits (alluvium) 
B Outwash (Steilacoom gravel) from retreating 
Vashon Glacier 
4 ol, ed) C Glacial drift (Vashon and Osceola), Wisconsin 
an Ves stage - Quaternary 
ee a D Outwash (Orting gravel and Puyallup sand) 
ae from Admiralty Glacier, shown by stippled 
bee ee —\ pattern 
} ee. E. Glacial drift (Admiralty), pre-Wisconsin 
5 ~ stage, represented by heavy line 
Pe i 
2 SE Underlying rotks 
c \ i fon ; 
2 Sammamish § Lava flows, andesite Quaternary 
‘oe By Inglewobd G Lava flows (andesite of Cascade Range), _} 
a = neces Miocene 
NN HOO 
\ H_ Shale, Miocene Tertiary 
with coal beds (Puget| 
Sandstone and shale, 
group), Eocene J 
| JK7 
tat"; 
ENGRAVED AMD PRINTED @y THE U.S. GEOLOGICAL SUNY EY 
