128 OIL AND GAS; OHIO, WEST VIRGINIA, PENNSYLVANIA. 
Iii the following table are given the measurements obtained by com¬ 
paring the elevations of different marking strata of the Washington 
formation with the elevation of the top of the Waynesburg coal: 
Distance between top of Waynesburg coal and top of marking strata of Wash¬ 
ington formation , Mount Pleasant Township. Pennsylvania. 
Locality. 
Waynesburg 
“A” coal. 
Waynesburg 
“ B ” coal. 
---- 
Washington 
coal. 
YVoct r»f Pnnlrin QpVmnlhniiSP . 
Feet. 
Feet. 
56 
Feet. 
117 
115 
103 
105 
An q 1 f mil a cnnth nf Prnsr>ppt. P,hnrph 
35 
48 
61 
95 
39 
55 
61 
Zl 111 11CO CclO 1/ OI 111L 1VU1 J V V/A <4^, \J \J 4 — Hi VC40VA1 4/lii ■••.«... 
116 
A vprn.p'f* . 
37 
56 
>—i 
O 
QO 
Monongaliela formation .—The Pittsburg coal outcrops along the 
northeast edge of the township, on the south side of Robinson Run, at 
Primrose, also along Westland Run at the south edge of the town¬ 
ship. An outcrop of the Redstone coal was found on the road from 
Westland to Hickory, but in general this coal is not prominent. The 
Sewickley coal bed makes a very small blossom on the roads leading 
to the ridges from Chartiers Creek and Westland Run. By far the 
best marking stratum for geologic purposes throughout the town¬ 
ship is the Bulger member of the Benwood limestone. This bed is a 
pure crystalline limestone, from 1 to 2 feet thick. It is prominent 
about halfway up the hills above Westland, also in the hills south of 
Robinson Run. The Bulger limestone remains above water level nearly 
to the headwaters of Chartiers Creek and all its branches. The 
east-west structural trough, which passes through the middle of the 
township, lowers the formation, so that all of the Benwood limestone 
is below valley level in the vicinity of Rankin schoolhouse and also 
east and west from that point. The Uniontown coal amounts to little 
or nothing in this township. The Waynesburg coal is from 1 to H 
feet thick south of Primrose and through the middle of the township, 
but in the southeastern part it is only a few inches thick and hard to 
find. On the headwaters of Cherry Run and Burgetts Fork this 
coal is a short distance above valley level and is a good geologic guide. 
The conditions are not good for determining by the direct com¬ 
parison of outcrops the distances of the different marking strata of 
the Monongaliela formation above the Pittsburg coal. The best 
measurements were obtained by comparing the elevations of out¬ 
crops of the various strata with elevations of the Pittsburg coal as 
determined by mine survey and from the reliable records of wells. 
