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■■- /<« r V 
U S GEOLOGICAL SURVEY 
BULLETIN NO. 318 PL. X , c <>> 
LEGEND 
Coutours on top of 
Upper Washington 
limestone. Datum 
is sea.level 
Elevation above 
sealevel of top of 
Upper Wa sbingtnn 
Dme stone 
Number of beneb 
mark oc »n*e spouding 
to list in appendix 
Note: At points on map 
indicated by green crosses 
the elevation in feet of the 
top of the Upper Washing¬ 
ton limestone above sea 
level is shown by the ac¬ 
companying numbers in 
green. These elevations 
are determined by spirit 
level, either directly upon 
this bed or upon others 
having a known distance 
above or below it. 
The numbers in red cor¬ 
respond to the numbers of 
bench marks described in 
the appendix of the accom¬ 
panying bulletin, from which 
the elevations on the lime- 
0 stone were secured. 
80*30' ENG 
a v ! H M Wi I son, Geogra pher. 
$ Robt D Cummin, in charge of section. 
k Topography by M. J.Munn. Assistant, EL.W. M 
Control by D H Baldwin and B.J.Green. 
Surveyed in 1904- and I9€5. 
MAP OF CLAYSVILLE QUADRANGLE, PA., SHOWING BENCH MARKS ANT) 
STRUCTURE CONTOURS ON TOP OF UPPER WASHINGTON LIMESTONE 
eology fcy M.J.Munn 
nder the direction of 
R.Campbell 
Scale 626oo 
SURVEYED IN COOPERATION WITH THE STATE OF PENNSYLVANIA 
2 
miles 
x | o l 2 a _4*__ ft kilometers 
Surface contour interval 20 feet. 
Datum 
mean eea. level . 
1907 
