333 



former reports, appeal's at the surface at Gypsum Creek, three miles dis- 

 tant; showing an inchnation to the rocks, at this point, of about twenty 

 feet m the mile. 



By reference to a map of the State, it will be apparent that the strong- 

 est brine springs, (among which are included those in the vicinity of 

 these borings,) make their appearance along a line which will be found 

 to correspond with the " synclinal axis," or axis of the dip of the rocks 

 composing the great Peninsula basin; a circumstance which would be 

 looked for, from the fact that the ordinary law of gravitation would con- 

 duct the stronor brines to the lowest levels of the rock strata. While, 

 therefore, the depth to which the boring must be carried, in order to 

 reach the lower salt bearing strata, will be greater than would be the 

 case in some other portions of the State, the comparative strength of the 

 brine obtained may be expected to be proportionably increased. 



Through the politeness of the Hon. Lucius Lyon, I am enabled to 

 subjoin a section of strata passed through at the boring above mentioned : 



Diagram of Strata paused through at Salt Well of Hon. lA/ciiis 



Lgoii, Grand Rapids. 



Thickness 

 ill k'et . 



Total depth 

 ill feet. 



rittrd gray limeroc'li, irregularly stratitied, and in porlioas 

 (iivenious, _ 



Yellow Biindrock, producing fresh water, --.. 



nine flav, __ __ 



Ciiarse, reddish sandrock, 



Ulue clay, _ 



Clay slate, with thin layers of gypsum interstratified, 



Clay slate, 



tiypsuni, _. 



(."■Idy slate, ■ 



Gypsum, 



nijiy slate _ 



15'uish sandrock, very hard, with sharp prit 



Bluish clay rock, intermixed wiih particles of reddish rock, 

 compact. This rock is strongly impregnated with salioe 

 particles, 



Sand and clay rook alternsting 



Carbonate of lime and gypsum, combined; very com- 

 pact,. __ 



Gypsum, ..: 



('ia\ slate, 



Gray sandrock, of very sharp grit, and hard 



' 'lay rock, 



Gypsura, with vein of salt water, 



Cl.vy rock, ___ 



Gypsum and clay slate, or gypseous marls, alternatipg, . . 



■".y psiim, _ _ . 



< 'lay rock, 



Gypsum, 



Hard sandroclt, produ ing fresh water, 



Olav rock, free from saline matter,. 



Hard sandrock, very compiler, and of dark col r, 



^of t sandrock, nearly colorless, 



" of nearly hlue color, - . 



Loose, coarse grained si.ndrock, of reddish color, opening 

 a very copious spring of fresh water 



14 

 6 

 2 

 5 

 3 

 11 

 18 

 4 

 2 

 6 

 3 

 8 



18 



7 



10 



7 



9 



5 



2!^ 



6>^ 



6 

 19 



3 



3 



1 



VA 

 10 K 



7 

 18 

 32 



17 



14 

 20 



22 

 27 



;,o 



41 

 59 

 63 

 65 



71 

 74 



82 



100 

 107 



117 



124 



133 



13-< 



1411}^ 



147 



IbZ 



172 



175 



178 



171 



180>2 



191 



19=> 

 216 



2l8 



re's 



