Geological Divisions.
The great line extending throughout the State fro north to south and dividing the Carboniferous from the Sub-carboniferous regions, passes in an irregular path through a portion of our county. It strikes our county near the Hopewell-Thorn boundary and its course is approximately south till it reaches the northwest corner of Jackson. Here it sweeps north, east and then sought. Junction City is its east- ern extremity. It then continues in a southwesterly direction leaving the county at the southwest corner of Section 18 in Jackson township. East of this line are found the coal measures. None are found west of it. Our strata rise to the northwest at the rate of about thirty feet to the mile. It follows then that rock lying three hundred feet beneath the surface at a given elevation in the southeast of the county, would appear on the surface, at the same elevation, ten miles northwest. For example, McCuneville and Maxville have approximately the same altitude. At McCuneville the Sub-caroniferous or Maxville lime-5
stone, is one hundred and ten feet beneath the creek bed. At Maxville the line appears in the bed of the creek. The Sub-carboniferous line as its name implies underlies all our coal measure. When the Maxville makes it appearance on the tops of the hills, it is useless to look for coal there. So, the line we have described, theoretically marks the out-crop of the Sub- carboniferous line on the tops of our hills. (See Map)6