116 
ECONOMIC GEOLOGY OF AMITY QUADRANGLE, PA. 
LOCAL COALS. 
On Cemetery Hill, Washington, a coal 18 inches thick occurs 5 feet 
above the Upper Washington limestone and 5 feet below an 8-foot bed 
of limestone. Another coal blossom has been noted at several locali- 
ties at an estimated interval of 170 to 200 feet above the Upper Wash- 
ington limestone. Tins is probably equivalent to the Dunkard coal of 
southern Greene County. 
COALS WHICH DO NOT OUTCROP. 
COALS IX THE CONEMAUGH FORMATION. 
Coal beds in the Concilia ugh formation are usually thin and irregu- 
lar in occurrence, but several horizons are known at which they appear 
to be rather persistent. One of these is reported in several wells in 
Washington County. In the Isaac Horn No. 1 well ( 283 ), near Zollars- 
ville, it occurs at an interval of 445 feet, in the Joseph B. Wise No. 1 
(303) mi 110 feci, and in the Lusewell(15) at 384 feet below the Pitts- 
burg coal. The average interval to the Upper Freeport coal in this 
vicinity being assumed as 600 feet, the intermediate coal in these wells 
occurs al about 155, 190, and 216 feet, respectively, above the Upper 
Freeport. These intervals agree well with that of the Bakerstown 
coal, a thin bed which is present in many places in Allegheny and 
Beaver counties. In the I lorn No. 2 well another coal has been notel 
245 feel below the Pittsburg bed. 
COALS IN THE ALLEGHENY FORMATION. 
Except in one or two instances only two coal beds of this formation 
arc recorded in wells of the Amity quadrangle. These beds arc the 
Upper Freeport ("Connellsvillc") and a bed which lies about 150 feet 
below it. 
The Upper Freeport coal lies at the top of the Allegheny formation 
and seems to be very persistent. The quality of this coal is not 
know n. but the bed is reported in a number of deep wells. Its depth 
below the Pittsburg coal is given in the following table: 
Distance from top of Pittsburg coal to top of Upper Freeport coal, as shown by drill records. 
No. on 
PI. I. 
Name of well. 
Location. 
Distance. 
Thickness 
of Upper 
Freeport 
coal. 
C M. Reed 
South Strabane Township 
Borough of Deemst on 
Feet. 
600 
604 
604 
600 
580 
564 
600 
Feet. 
29 
Matilda Davis No. 2 
10 
24 
.do 
4 
37 
Obcrholt . . . 
do 
7 
28 
W'm. Crumrine 
J. L. Thompson No. 2 
J. L. Thompson No. 3 
...do 
11 
45 
do 
5 
46 
do 
5 
