58 GEOLOGY OF ILLINOIS. 



At Hamiker's old mill ou the Bonpass, a little north of west from 

 Allendale, a bed of bituminous shale outcrops at the base of the bluff, 

 overlaid by a conglomerate of ferruginous pebbles and a rather soft, 

 thin-bedded sandstone. The section here is as follows : 



Ft. 



S ift, thin bedded sandstone and shale 15 



Ferruginous conglomerate 3 to 4 



Hard black shale 2 to 3 



The black shale extended below the bed of the creek, and I could not 

 learn that aDy coal had been found underneath it here. These beds 

 resemble the outcrop at the iron bridge on the Little Wabash, between 

 Albion and Fairfield. 



Prof. Cos reports the following sections at points I did not visit :' 

 " On sec. 5, T. 10, R. 12, there is a bed of light-blue clay, very plastic, 

 exposed in the bank of Crawfish creek, as shown in the following section : 



Ft. In. 



Soil, calcareous shale and limestone 16 



Coal 8 



Blue clay 4 



Sandstone in the bed of the creek ? " 



The calcareous shale above the coal contains the same species of 

 fossils enumerated from the locality on Raccoon creek at Hamiker's old 

 mill, indicating the horizon of coal So. 11. 



" At Emanuel Reel's place, on sec. 8, T. 1 S-, R. 12, blue limestone at 

 the foot of the hill one foot thick, underlaid by a thin coal. Bluish 

 shale and sandstone in the hill forty feet above. The well at the house 

 ■went through soil and drift 10 feet, clay shale i feet, sandstone 29 feet. 



At Little Rock, on the Wabash river, sec. 19, T. 1 2sT., R. 11 W. : 



Ft. 



Shale and covered slope 80 



Sandstone in solid bed 30 " 



This hill forms a conspicuous land-mark on the river, and the sand- 

 stone at the base is probably the same as that found at St. Francisville, 

 a little higher up the river, in Lawrence county. 



Edwards County. The outcrops of rock in this county are few and 

 widely separated, and no continuous section of the beds could possibly 

 be made from surface exposures only. The sandstones and shales inter- 

 vening between coals Xo. 11 and 13 are probably the prevailing rocks. 

 The following beds may be seen in the vicinity of Albion, in the rail- 

 road cut and on the small creek that intersects the town : 



Ft. In. 



Shale and shaly sandstone with a pebbly bed at the bottom 20 to 25 



Sandstone, locally hard and concretionary 8 to 12 



Streak of bituminous shale 3 



Hard nodular limestone 2 



Shale with bands of argillaceous iron ore 4 to 6 



llard shaly sandstone 8 to 4 



