WAVERLY GROUP. 85 



At a depth of 330 feet below the surface, and also at 643 feet, 

 copious water streams were found, which rise to the surface, mak- 

 ing an overflow of mineral water of quite an agreeable, refreshing 

 taste. In the lower part of the boring salt brine was found, which, 

 however, does not rise and mingle with the upper streams. 



Of the deep boring, an accurate record of which would have been 

 of great scientific interest, I could only get the general results, 

 given from memory, by one of the superintendents of the work. 



Drift deposits 235 ft. 



Shales of lighter and darker color, alternating 



with seams of sand rock 450 " 



Strong flow of mineral water. 



Blue shales, with some harder seams 775 " 



Hydro-carburetted gas, drops of rock oil, and saline water. 



Soft blue shale 150" 



Red shale 150" 



Lime rock, with seams of shale 300 " 



Salt-bearing rock, with seams of sandstone 50 " 



Dark-colored lime rock 250 " 



Gypsum beds, alternating with limestone 195 " 



Dark, loose, porous lime rock, 82 feet thick, forms the bottom part 

 of the bore-hole. It is to be regretted that no special pains were 

 taken to preserve a regular set of specimens from each pumping. 

 Few of them were kept in the office, mostly of shaly or arenaceous 

 character, but of the horizons of the lime rock and gypsum beds, 

 which I was very desirous to see, I could find nothing preserved. 

 It is probable that the lower 800 or 900 feet of the boring pen- 

 etrates the Hamilton and Helderberg groups, and that the salt brine 

 found in the lower end of the well belongs to the Onondaga series, 

 like the salt wells of Alpena, and of Goderich in Canada. 



In previous pages, I have led the reader over the different 

 outcrops of the upper division of the Waverly group, as developed 

 in Michigan, and, occasionally, I gave an account of deep borings 

 made in places vicinal to the outcrops. This upper division, prin- 

 cipally composed of sand rock with intermediate subordinate 

 seams of shale, has, as far as known by means of the deep borings 

 in different parts of the State, a thickness of from 250 to 350 feet. 

 The higher portion of the deposits is a porous, middling, coarse- 



