18 ECONOMIC GEOLOGY OF AMITY QUADRANGLE, PA. 
Thickness of M onongahela formation in Amity quadrangle. 
No. 
on 
PI. I. 
234 
273 
285 
295 
2! C 
Name of well. 
Baker 
Moses Smith (diamond drill) 
N. T.Clark No. 1 
Mrs. A. L. Hawkins No. 3 
L. V. Martindale No. 2 
J. L. Thompson No. 1 
J. L. Thompson No. 2 
J. L. Thompson No. 3 
J. L. Thompson No. 4 
J. L. Thompson No. 5 
Blakeley No. 1 
Mrs. A. 1.. Hawkins No. 2 
Eaton I -i iso heirs No. 1 
Bristor Bros., No. 3 
Elmas Carey, No. l 
Meloy, No. l 
J . C. Mounts 
Washington Floral Co 
X. T. (lark No. 2 
J. C. Martin No. 1 ? 
Joseph Ross No. 1 
John ('. Sargenl No. 2 
Thompson & Seaman Coal Co. No. 1 
S. F. Scott No. 1 
Average thickness. 
Location. 
Amwell Township 
....do 
Borough of Deemston. 
....do 
.do. 
.do. 
.do. 
.do. 
.do. 
East Bethlehem Tow nship 
Borough of Beallsville 
....do 
Morris Township, Greene County 
Morris Township. Washington County 
....do 
North Franklin Township 
South Strabane Township 
West liothlchem Township 
....do • 
...do 
....do 
....do 
WYst Pike Run Township 
Thickness 
of Monon- 
gahela for- 
mation. 
o345 
336 
339 
340 
338 
348 
366 
345 
347 
337 
<> 363 
340 
326 
a353 
320 
321 
352 
340 
337 
«323 
"348 
350 
«308 
340 
a In this instance the bottom of the Pittsburg coal is not given; it is estimated as being 8 feet (the 
average distance) below the top of the bed. 
By comparison of these records it will be seen that while the lesser 
measurements are generally more abundant in the western portion 
there are also points in West Pike Run and West Bethlehem town- 
ships, etc., where the thickness is but little over 300 feet. Thick- 
nesses of 345 feet and 352 feet are reported in western Amwell and in 
South Strabane townships. In general, however, the Monongahcla 
formation in southwestern Pennsylvania grows thinner toward the 
northwest. In the northern part of this quadrangle no records are 
obtainable which report both coals, but from estimates of the interval 
made by subtracting elevations of the Pittsburg coal, as reported in 
wells, from those of neighboring outcrops of the Waynesburg coal, 
the thickness in that region seems to average less than 300 feet. 
Distribution. — The formation outcrops mostly near the northern 
and eastern edges of the territory, but it also reaches the surface for 
about a mile on Little Tenmile Creek at Lone Pine. In the north- 
west corner of the quadrangle it covers the entire area west and north 
of Chartiers Creek, with the exception of a stretch near the main 
valley, occupied by Conemaugh rocks and Quaternary deposits; and 
