120 ANNUAL REPORT 
Feet 
Berea2rit; “top Pau erect ae bwin a ene ane 888 
WO CTOMA Ae eee ee es PAO ee Rea eT ee 942 
730 feet of 8 1-3 inch casing. 
942 feet of 614 inch casing. 
Corniferous Lower Helderberg and Niagara limestones, 
10) Oma 2)] Be SAPS RA RP EU ae eyTm ROE HIER GIN IN G51 Be AE AES Gun trond 1,735 
DOUCOMAL Cos sce choc serche re cereal lente ore ene no et: 2,390 
Clinton: top Vals. 58 aes Gere Te gas 2,390 
DOLCOM  BU P25 aie SRE ea ee re Pear ener: 2,460 
Medina, hard above, but very soft below, top at. Sore 2,460 
1 Of 0)16 Woy 0a loa s Y GREP kee ny URD NCR cn ca ee RNC UMAR. (i SRN cris 2,560 
2,554 feet of 5 3-16 inch casing. 
CincinnatiZseries: top sateen t i eee Ce ena ears 2,560 
bottom Ot? Welle ssivce tens eee Cha eee rete 2,860 
Lastly there is given a skeleton record of a well near Homer, in the 
northern part of the Central Ohio Natural Gas Fields. The location is 
on the Beatty farm in Burlington township, Licking county: 
Feet. 
PNIVE: DIDO er iateet eee ee eee eee EAE EL eee Rg aS hoe UD 
Bottommot Berea (cased hene)cynieeee eee ' 618 
Lop) of simestone ss (Corniferous) ieee coe ene 1,420 
Bottom oLslimestones@Niazarayie ae aoe easier ail: 2,100 
Top; Of Clinton sam dis wise crete hee ee ener aaa 2,303 
BottomvotsChintonwsand terrace eee 2,315 
Nop OL) Medinalvshaless crcccccceictacreinrto crete nar eu aorenelne 2,340 
Total.Cepth ey GE. cewek soe oe ETE ee ence bap als 2,345 
This makes the interval between the Berea grit and the Ohio shales 
802 feet, and the thickness of the limestone 680 feet. Other wells drilled 
in different parts of the field make the interval referred to vary from 754 
to 826 feet, and the thickness of the limestone range from 680 to 764 feet. 
An average of 7 measurements gives 743 feet. This is nearly 50 feet 
greater than the average in the Sugar Grove field. 
The Clinton Formation.—The only part of Ohio in which the Clinton 
outcrops is the southwestern. Its area there is very small, but it is usually 
conspicuous. This results from the fact that the underlying rocks are 
shales; while the Clinton, being composed of much more durable material, 
forms an escarpment. The formation is composed essentially of lime- 
stone. This is highly crystalline, delicately colored, and quite fossili- 
ferous. It takes a good polish and has been called marble. At places it 
is a building stone of high grade, but the lenticular nature of the bedding 
is an obstacle to its use for this purpose. In composition the limestone 
is calcareous, and in places it becomes the purest rock of this type in Ohio. 
The following is an analysis from near Osborn, Green county :! 
1Geol. Sur. of Ohio, Vol. VI, p. 728. 
