BROWN COUNTY. 67 



group, consisting of limestones and calcareous sandstones, which outcrop at the 

 base of the bluff. The following beds of the lower Coal Measures outcrop at 

 this locality : 



FEET. IN. 



Shale 10 



Band of iron ore, with fossils 4 



Shaly clay 3 



Limestone . . 1 



Bituminous shale 2 



Coal 2 6 



Shaly fire clay 4 



Compact nodular limestone 4 to 6 



Shaly clay 15 



Ferruginous sandstone 15 



The horizon of coal No. 1, in the foregoing section, is between the ferru- 

 ginous sandstone, and the bed of clay shale which overlies it, but no trace of 

 coal was to be seen where this section was made. A little further to the north- 

 ward, coal is said to have been found near the base of the bluff, and if so, it 

 must have come from seam No. 1. The upper shale in the foregoing section, 

 contains a calcareous band in the lower part of the bed, which is filled with 

 fossil shells, among which, we observed Productus muricatus, and Chonetcs 

 mesoloba, and these species were also found in the band of iron ore below. The 

 compact and nodular limestone below the coal, contains several species of uni- 

 valve shells, belonging to the genera Naticopsis Pleurotomaria, and Murchisonia. 



The clay shale below this limestone, affords the potter's clays so extensively 

 used in this county in the manufacture of pottery, and its average thickness is 

 fifteen feet. At Ripley, the same beds are exposed as at LaGrange, and show 

 but little variation in their lithological characters, as may be seen from the fol- 

 lowing section at that point : 



FEET. IN. 



Micaceous sandstone , 4 to 6 



Argillaceous shale 4 



Bituminous shale 3 . 



Coal No. 2 2 



Fire clay and shale 6 



Nodular bluish gray limestone 5 



Light gray clay shale (Potter's clay) 15 



Bituminous shale (Coal No. 1) 3 



Ferruginous clay 6 



Quartzose sandstone 20 



The bed of sandstone at the base of this section, represents the conglomerate 

 which usually forms the base of the Coal Measures, and is quite variable in 

 thickness, ranging, in this county, from five to twenty feet, though it is fre- 

 quently wanting altogether. For three or four miles south of LaGrange, this 



