672 



GEOLOGY OF OHIO. 



can be determined. About one mile north, on Mr. Gloyer's land, in. 

 Clark township, the following section was obtained: 



30 



3 



a 6 



20 



280 :^ 



Coal Ko. 6, 100 feet from top of hill. 



Shaly sandstone. 



Black limestone. 



Coal. 



Sandy shale. 



Coal streak at base. 



UneTenly hedded, massiTe, coarse sandstone, "with 

 streak of coal near base. 



I ) I 1 r 



Conglomerate. 



This section shows that after the deposit of the lower coals there was an 

 upheaval of 280 feet, and a channel plowed by the water to the base of the 

 Coal Measures. The thin conglomerate in this neighborhood is cherty, and 

 from one of these fragments of cherts I have obtained a fair sized crystal 

 of galena, the best specimen of lead ore I have ever seen obtained from 

 Ohio rocks. 



Mill Creek. — Low's coal bank, in the north-west corner of this township, 

 one mile east from Bloomfield, lies directly under the gray limestone, a 

 seam of fire-clay, seven inches thick separating the limestone from the 

 upper layer of coal. This upper layer is bright coal five inches thick, 

 under it cannel coal seven inches, and under this two feet five inches of 

 good, bright coal. In the next hill west is Evans' coal bank, at thirty 

 feet higher elevation. This has been opened, but not worked much, and 

 was in no condition to enter. The bed is said to be three feet thick, the 

 coal to be of good quality. It has a good cover of sandstone, making the 

 summit of the hill. 



Through the western part of Mill Creek, by the "grade road," expo- 

 sures of strata that can be recognized are very rare; and no openings 

 of coal are met with. Near the south line of the township the blue 

 limestone is seen at several places along the road, sometimes with the 



