Mar., 1910.] 
Pennsylvanian Limestones. 
119 
highway. It was formerly quarried on both sides of the ravine 
for some distance and burned for lime. At this point it lies at 
1007 above sea. 
Baldwin Outcrop. A half mile south of the last outcrop and 
on the Jesse Baldwin farm this same stratum may again be seen 
in a ravine in the rear of the Baldwin residence where it is 2 feet, 
3 inches thick and overlies 18 inches of coal which was formerly 
mined on this farm to a limited extent. By topographic map the 
limestone lies about 1010 above sea. About 200 yards east of 
this point and across the road fragments of a limestone are lifted 
in plowing and the stratum w r ould seem to lie about 1050 above 
sea. 
Davis Well. This elevation would seem to be confirmed by 
penetrating a limestone at 1050 in a well at the residence of George 
E. Davis on the Youngstown-Boardman pike. The Davis well 
is 1 mile southeast of the Baldwin outcrop. It would seem that 
the second limestone is the Upper Mercer. If it is the Upper 
Mercer the interval is greater than anywhere else found. 
Moyer Spring. At a point \ mile south of the Davis well and 
1 mile southeast of the Baldwdn outcrop a limestone is found in 
a spring at the sawmill on the Samuel Moyer farm and lies at 
1030 above sea. 
Geiger Well. Cn the C. T. Geiger farm ^ mile southeast of 
the Moyer spring a limestone was penetrated in a test -well at 9 
feet lower than in the Moyer Spring. 
Walters Well. At the residence of E. C. Walters 1 mile south- 
west of the Moyer Spring a limestone occurs in the well at 1018 
above sea and about 500 yards northwest of the Walters residence 
the Lower Mercer is exposed on Mill Creek at about 1000 above 
sea. As seen here this stratum is 2 feet, 4 inches in thickness and 
presents its usual characters. It directly overlies a black coaly 
shale varying from 0 to 18 inches in thickness. 
Greenhouse Hill. Returning to the vicinity of Youngstowm 
a third limestone is found § mile east of the Lanterman outcrop 
and J mile north of the toumship line on the Youngstown-Board- 
man pike. It outcrops in the gutter on either side of the pike 
a little above the greenhouse. The limestone is dark blue, fos- 
siliferous, 2 feet thick, underlain by coaly shale, and lies at 1076 
elevation. Xo other outcrop of it was found in this locality. The 
Lanterman, Baldwdn, Davis well, and Greenhouse Hill limestones 
are sufficiently close together to conclude from them that the 
limestones found at these points are the Lower Mercer, Upper 
Mercer and the How r enstein. 
Dr. Newberry in his report on Mahoning County gives a sec- 
tion of a boring made near the south side of Youngstowm Town- 
ship in which three limestones wmre penetrated. [Ohio. Geol. 
Sur. Vol. Ill, p. 803.] They are between tops, lower and middle 
