DETAILED GEOLOGY OF EURGETTSTOWN QUADRANGLE. 131 
diffeient outcrops. It was therefore necessary to compare the eleva¬ 
tions of outcrops with the elevation of the Pittsburg coal in wells 
chilled neai the outcrop. Ihe following table gives the information 
obtained in this way: 
Distance betiveen base of Pittsburg coal and marking strata of Monongahela 
formation, Chartiers Township, Pennsylvania. 
Locality. 
Dinsmore 
limestone. 
Bulger 
limestone; 
Waynesburg 
coal. 
South side of creek at Menden. 
Feet. 
128 
Feet. 
Feet. 
Near Mount Pleasant Township line, outcrop compared with 
record of T. M. Paxton well No. 2... 
160 
183 
167 
182 
178 
East border of quadrangle, outcrop compared with record of S. 
Griffith well No. 1. 
1 mile northeast of Westland, outcrop compared w 7 ith record of 
Robert Cowden well No. 4. 
1 mile northeast of Westland, outcrop compared with record of 
Robert Cow 7 den well No. 2. 
Southeast corner of quadrangle, outcrops on road over hill to 
w 7 est.. 
134 
288 
Average. 
131 
174 
