14 Elevations in Ohio and the adjacent States. 
1. Limestone; thickness unknown, not exceeding 1000 feet ; 
subdivided as follows. by Dr. Locke: (1.) Blue limestone and 
blue limestone marls, over 500 feet in thickness; (2.) Marl, 25 
feet; (3.) Flinty limestone, 52 feet; (4.) Marl, 106 feet; (5.) 
Cliff limestone, 89 feet. ‘This limestone is the surface rock over 
about two fifths of the western part of Ohio, and extending into 
Indiana. 
2. Bituminous slate, or black shale, 250 to 350 feet. 
3. Fine-grained or Waverley sandstone, 25 to 350 feet. 
4. Conglomerate or pebbled sand-rock, 100 to 600 feet. 
5. Coal measures, say 2000 feet. 
Formation No. I.—Elevation of some points at the surface of the limestone forma- 
tion and at the bottom of the slate. 
Course and distance {Height above 
Place. from Columbus. the ocean. Local dip per mile. 
Columbus, 761 feet |S.81°52! E., 223 feet. 
Bloomingville, Erie Co. ; ee é 
Pee eaieendas: : N.8}°E.,100miles| 7247: 
Dublin, Franklin Co., N.36°W. 11 * 831“ 
Bainbridge, Ross Co., S. 123° W. 52“ 744 + 
West Union, Adams €o., |S.154°W. 80 “ | 934 “ |S.803°E., 37.4 feet. 
Three miles S. E. of Day- 
ton, bottom of cliff lime- + S. 763° W. 62 * 868 ‘“ IN. 14°E., 6 feet. 
stone, 
With the exception of Dayton, these locations are at or near the 
outcrop of the overlapping slate, and consequently in or near the 
line of bearing. 
No. I1.—Points on the surface of the black shale and under face of the fine-grained 
sandstone. 
Place. Course and distance. | Height. Dip. 
ae iene eon, } N.41°E., 154 miles,| 764 feet./S.8.E., very slight. 
Sandusky township,Craw- Deal b 
Bde, Gaatlitgy RIN: AcE: 62 «| 9482" |S. E. and slight 
Big Walnut Creek, Na- 2) S nearly E.,—about 
tional Road, tN. ge oe ; 30 feet per mile. 
Head of Paint Creek Ca- . 
sly Hess Co, bsouth, 43 «| 81d * |S. 83° E. 31.99 feet 
rse mill, on canal, near 
Bee ail i's. SPE, 63). |' SB) & 
The last station is about fifteen miles east of the outcrop, which 
accounts for its being lower in natural level than the others. ‘This 
formation occupies a narrow belt of about twenty miles in width 
along the Scioto valley, widening as it extends northward to the 
Lake. It is here about sixty miles in breadth, east and west, and 
extends eastward in form of a narrow strip along the southern 
shore, to and beyond the State line. 
