CLAEK COUNTY. 15 



stone that forms bold cliffs along the banks of the stream from 20 to 30 

 feet in hight. At the base of this sandstone there is a band of pebbly 

 conglomerate from one to three feet in thickness, containing fragments 

 of fossil wood in a partially carbonized condition, and mineral charcoal. 



The regularly bedded layers of this sandstone have been extensively 

 quarried on this creek for the construction of culverts and bridge abut- 

 ments in this vicinity, and the rock is found to harden on exposure and 

 proves to be a valuable stone for such uses. Some of the layers are of 

 the proper thickness for flag stones, and from their even bedding can 

 be readily quarried of the required size and thickness. 



This sandstone is underlaid by an argillaceous shale, and a black 

 slate which, where first observed, was only two or three inches thick, 

 but gradually increased down stream to a thickness of about fifteen 

 inches. The blue shale above it contains concretions of argillaceous 

 limestone with numerous fossils, among which were Pleurotomaria 

 spluerulata, P. GrrayviUensis, Astartella vera, Nucula ventricosa, Rhyn- 

 chonella Eatoniceformis, Orthis carbonaria, and LopliopJvyllum proliferum. 

 These fossils indicate the horizon of No. 13 coal, and in Lawrence, 

 White and Wabash counties we find a well defined coal seam associated 

 with a similar shale containing the same group of fossils, but possibly 

 belonging to a somewhat lower horizon. 



On Blackburn branch, commencing on sec. 24 in the same township, 

 and following down the stream for a mile and a half, we have a repeti- 

 tion of the same beds of shale and sandstone seen on Hurricane creek, 

 underlaid by the clay shale and black slate, Nos. 13 and 14 of the 

 county section. 



Near the center of section 4, T. 9, E. 12, the following beds were 

 found on Joe's Fork, above the site of the old Anderson mill: 



Ft. 

 Massive sandstone, the same seen on Hurricane creek 25 



Dark shales with nodules of arg. limestone 5 to 8 



Black shale 1 to 2 



Sandy shale and evenly bedded sandstone 20 to 25 



Greenish colored sandy and arg. shales 35 to 40 



Hard concretionary sandstones with softer beds below 8 to 10 



Gray sparry limestone , 5 



Shale with 10 inch seam of coal 8 



Brownish-gray, hard, brittle limestone 7 to 8 



The above includes Nos. 12 to 20 of the county section. The lime- 

 stones at the base of the above section are the equivalents of the 

 Livingston limestones hereafter described, and they pass below the 

 bed of the creek here about a mile above the old mill. The sandstone 

 overlaying the upper limestone here, when evenly bedded, is quarried 

 for building stone and affords a very good and durable material of this 

 kind for common use. At the mouth of Joe's Fork the lower limestone 

 is partly below the creek bed, the upper four feet only being visible, 



