HENRY COUNTY. 189 



particular deposits, on account of the scarcity of outcrops. In other 

 counties the railroads and the streams nearly always expose the upper 

 rock formations, and give, in their cuts and banks, well marked outcrops. 

 In Henry county, the railroads only afford a few clay cuts, not once ex- 

 posing any rock formation. The river banks of Green and the Edwards, 

 are, if possible, still more unfavorable for geological examinations. ]Sot 

 once, so far as I know, do the banks or bends of these streams afford 

 good outcrops of even the sandstones and limestones of the Coal Meas- 

 ures. Large portions of the county are utterly without stone quarries 

 of any kind. In a few places fragmentary outcrops of rotten sandstone, 

 or defective shaly limestone, occur ; and in a very few localities limestone 

 or sandstone is quarried in abundance. I shall first speak of these out- 

 crops, before attempting to describe and trace the coal seams. 



Xttnflstone. Overlying the lower coal and its roof of black shales and 

 dark limestone, is a heavy deposit of coarse-grained sandstone. The 

 rock is gritty, not very hard, of a creamy-brown or dirty-whitish color, 

 and greatly resembles the sandstone deposit north of Morrison, except 

 that the soapstone seams are wanting. Three miles below Cleveland, 

 in the face of the river bluffs, but near their base, and at several places 

 below or farther down the river, the outcrop is conspicuous, and has been 

 quarried for local uses. The outcrops are partly hidden by talus ; but 

 the sandstone at these localities seems to be from twenty to thirty feet 

 thick. This same sandstone, on a line westward, outcrops heavily at 

 Camden, at Hampton, and opposite the latter place in Iowa. At the 

 latter place, some fine specimens of Lepidodendron were found some years 

 ago. The principal outcrops about Cleveland are on sections 20 and 35 

 of township 17, range 1 east. At Moline it also outcrops, and at Hamp- 

 ton, it covers a thin coal seam or trace of coal.* At Camden, the coal 

 seems to be above the heaviest body of sandstone. At Hickory Grove 

 there is a light sandstone outcrop, not very thick ; stone poor quality ; 

 quarried by neighboring farmers. In the valley of Green river, up the 

 latter valley, and into the bluffs of Mineral creek about Miuersville, the 

 same bed of sandstone shows itself in several places. The outcrops here 

 run from seven to twelve and twenty feet thick. On section 3 in the 

 township of Munson, and not far from. Cambridge, some poor sandstones 

 are quarried. In the shaft of the Platt Coal Company, just east of Ke- 

 wanee, thirty feet of heavy sandstone was struck immediately overlaying 

 the coal seam at the bottom of the shaft, but this bed is about a hun- 

 dred feet below the surface.! In the vicinity of Red Oak Grove, a thin, 



*NOTE. We think Mr. SHAW has here confounded two distinct beds of sandstone, that at Camden 

 being below the main coal seam, instead of above it. The sandstone above the coal is a much more 

 durable, and is generally a harder rock than the bed below. A. H. W. 



tXoxE. This sandstone overlies coal 5 or 6 and is at least one hundred and fifty feet above either of 

 the beds outcropping in the vicinity of Camden, Moliue or Carbon Cliff. A. H. W. 



