148 



REPORT OF THE 



VI. — Butter-worth's Salt Well, Grand Rapids, at his Foundry, 

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



At 



Tepth 



of 



° E 3 



^.1 



DESCRIPTION OF ROCKS, &C. 



Ft. 



24 



27 



30 



57 

 61 



4 

 61 



122 

 129 



7 



48 



177 



7 



184 

 261 



77 

 13 



274 

 293 



19 

 10 



303 



128 



59 



Ft. 



27 



157 



119 

 128 



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



limerock, hard, 5 ft. 

 Calcareous sandrock, soft. 



Clay, 7 ft. ; shale, 8 ft., fresh water; limestone and clay alternately, 15 

 feet. 



" Brown, hard limegtone," filled with spar. First, salt. 



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

 sum. 



Very hard limerock, with gypsum. 



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

 (Butterworth). At 146 ft. brine 5°, Beaume, temp. 50° Fab. 



Limerock and gypsum. 



Sandrock, bluish-gray. Water increasing. 



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



per minute. 

 Sandrock, argillaceous. 

 Dividing shale. Sal. 20° to 26°. 



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



Alternating shales and flagstones. 

 Same continuing. 



