150 



REPORT OF THE 



VIII. — J. W. 8 Windsor's Salt Well near Grand Rapids. Lo- 

 cality—fraction No. 1, Sec. 12, T. 1 N., 12 W. Notes fur- 

 nislied by Mr. Windsor's Superintendent of operations. Well 

 bored in 1860. 



At 



Depth 



of 



r ^ 



a a 



a E ■ 



DESCRIPTION OF ROCKS, &c. 



Ft. 



Ft. 



Ft. | 







43 



43 



Superficial. 



43 



21 



Limestone. 8 in. clay and gravel at 53 ft. Drill went down rapidly 15 







21 



inches at 57 ft. 



64 



8 



Dark shale, with blue below, underlain by 8 in. hard limestone. 



72 



4 





Sandstone, very hard, yellow and gray. 



76 



12 





Shale, gypsum and clay. 



88 



1 





Sandstone. 



89 



10 





Clay, shale and gypsum. 



99 



9 





Greenish clay and shales, with black streaks. 



108 



24 





Gypsum, alternating with shale of varying hardness, and occasionally 

 greenish. 



132 



20 





Blackish-blue shale. 



152 



4 





Gypsum. 



156 



10 





Black shale. First brine at 164 feet. 



166 



13 





Gypseous clay, very salt, underlain by black, salt shale, alternating 

 with gypsum. 



179 



4 





Black, Very hard rock. 



183 



57 





Dark flinty beds, interlaminated with clay and gypsum. Shale below. 



240 



8 



184 



Very hard, pyritiferous rock, with gypseous clays. 



248 



79 





Sandrock:" Brine 16° at 259ft.— 20° at 278 ft.— 17' at 319ft. 





327 



22 



101 



Clay and sandrock, followed by clay, with some very hard Btreal 

 Sal. 26°. 



a 



349 



74 





Sandrock, white. Sal. 31° at 391 ft. The overflow, 24°. 





423 



23 



97 



■i 



Argillaceous sandrock, fine. Brine remaining the same. 



Same continuing. Discharge of water about 35 gallons per minute. 





446 









