122 REPORT OF THE 



In the vicinity of Corunna, which is still further within the 

 basin, the coal has been successfully worked on a small scale 

 for a number of years. From an outcrop in the bank of a small 

 creek on the W. \ N. E\ frl. J, sec. 22, Caledonia, Mr. Alexander 

 McArthur has removed several thousand bushels of broken coal 

 for the supply of neighboring blacksmiths. An excavation 

 made at this place by the Detroit and Milwaukee Railroad Com- 

 pany, reveals the following section: 



Highly ferruginous loam, 4 ft 



Blue clay, intersected by undulating bands of kidney iron 



nddules, i ft. 



Black bituminous shale, 2 ft. 



Bituminous coal, 3 J ft 



Clay. 

 Sandstone. 



The coal is of a handsome quality, and is intersected, like the 

 seam in Jackson county, by a streak of pyrites. , 



Half a mile east of here, the overlying Woodville sandstone 

 makes its appearance. In a shaft sunk by Frazer and Stanton, 

 not the one now worked, the following section was passed: 



Superficial materials 5 ft. 



Sandstone, ." 5 ft. 



Clay, 5 in. 



Coal 3 ft. 



Fire-clay, intersected by a band of impure, argillaceous 



iron ore, 16 ft 



Sandstone, 3 in. 



Fire-clay, 4 ft. 



The prevailing sandstone exposed at Rock Bar, at Blossom's 

 quarry, and numerous other localities in the vicinity of Corunna, 

 is probably the sandstone which overlies the ceal. 



At Owosso, a shaft was sunk by the Detroit and Milwaukee 

 Railroad Company, with the following result, as communicated 

 by B. 0. Williams, Esq., to whom I am indebted for much 

 assistance: 



Sandstone, flesh colored, seen also in bed of river .... 14 ft. 



Black band iron ore \ ft 



Cannel coal, 2 ft. 



Dark shales wth vegetable remains, 1 5 ft. 



