121 REPORT OF THE 



from Mr. Ott is correct, (and it is corroborated by Mr. B. 

 iams,) Six Mile Creek furnishes the greatest thickness of 

 workable coal that has yet become known in the Slate. 



Next to this, the greatest known thickness of any single vein 

 of coal is 4 feet 1 inch, in a shaft and boring sunk on Sec. 35, in 

 the township of Delta, Eaton county. My only knowledge of this 

 locality is recently obtained from Messrs. J. A. Kerr and LaRue, 

 of Lansing, who furnished me from their records the following 

 statement of rocks passed through: 



Superficial materials, 5 ft. 



Fire clay, soft, 2 ft. 8 in. 



Coal 2 ft. 3 in. 



Clay, somewhat bituminous, 4 it. 3 in. 



Coal, 1 ft. 11 in. 



Fire-clay, white and hard, 5 ft. 8 in. 



Argillaceous shale, . ' 16 ft. 2 in. 



Coal 8 in. 



Argillaceous shale, with some pyrites, 12 ft. 



Sandrock. 4 ft. 2 in. 



Coal, . . 4 ft. 1 in. 



Sandstone, grayish, soft. 



We have here a total thickness of 8 ft. 11 in. of coal, distrib- 

 uted in bands, as follows: 



Coal, 2 ft. 3 in. 



Clay, 4 ft. 3 in. 



Coal, 1ft. 11 in. 



Argillaceous strata, 2 1 ft. 10 in. 



Coal, * 8 in. 



Intervening strata, 16 ft. 2 in. 



Coal, 4 ft. 1 in. 



. 



Total, 51 ft. 2 in. 



The coal also outcrops at Chcsaning, on the land of Sherifl 

 Turner, and at several other points along the river in this 

 township and St. Charles. 



In the salt borings on the Saginaw river, coal is struck be- 

 tween 120 and 140 feet. At East Saginaw, according to notes 

 of Dr. Lathrop, the following was found to be the section through 

 the coal measures: 



