148 



REPOKT OF THE 



VI. — Butterworth's Salt Well, Grand Kapids, at his Foundry 

 Notes furnished by R. E. Butterworth, Esq. Bored in 1860 



DESCRIPTION OF ROCKS, &c. 





 24 

 27 



67 



61 



122 

 129 



177 



184 

 261 



2* 

 29! 



431 



490 



119 

 128 



Limestone, 12 ft. ; soft sandrock, 5 ft. ; limerock, 1 ft. ; clay slate, 1 ft. ; 



limerock, hard, 5 ft. 

 Calcareous sandrock, soft. 



Clay, 7ft.; shale, 8 ft., fresh water; limestone and clay alternately, 1£ 

 feet. 



' Brown, hard limestone," filled with spar. First salt. 



Varying argillaceous strata, all saliferous, with occasional beds of gyp- 

 sum. 



Very haVd limerock, with gypsum. 



Argillaceous strata, with much gypsum. Brine 91 gal. to bushel of salt. 

 (Butterworth). At 146 ft. brine 6°, Beaume, temp. 50° Fah. 



Limerock and gypsum. 



Sandrock, bluish-gray. "Water increasing. 



Sandrock, gray. Water suddenly gushing up at the rate of 350 gallons 



per minute. 

 Sandrock, argillaceous. 

 Dividing shale. Sal. 20" to 26°. 



Sandstone with shaly partings. Sal. 20° to 26°. 



Alternating shales and flagstones. 

 Same continuing. 



