CHAPTER V. 



Tables of deep borings in the State, with an exhibition of tfieir 



Geology. 



References have frequently been made to borings that have 

 been executed in our State, in search of salt, coal or other val- 

 uable products; and isolated facts, obtained by such borings, 

 have, in many instances, been incorporated into the preceding 

 chapters. In the present chapter, I present connected and com- 

 plete statements of the kind of rocks passed through,; in most 

 of the deep borings of our State. It has not been thought best 

 to present these reeords in all their details; I have, therefore, 

 greatly condensed them, taking care, however, to mention every 

 important change in the strata. The first column in all' the 

 tables shows the depth of the well at the upper part of the 

 stratum named in the last column. The second column shows 

 the thickness of the stratum. When the several strata which 

 constitute, a formation or group, are passed, a line is drawn 

 across the second column, and the total thickness of the forma- 

 tion or group is entered opposite, in the third column. The 

 table at the end is a summary of the whole. 



I. — Artesian Well at Detroit. 



["During the years 1829-30, the Hydraulic Company, with a 

 view of supplying this city with spring water, commenced and 

 completed, (although without gaining the object intended,) an 

 artesian well, near that point where Wayne Street intersects 

 Fort Street. This point is elevated 36 feet above the level of 

 the surface of Detroit river. The work was conducted under 

 the direction of A. E. Hathon. In the North-western Journal 

 for April 21, 1830, an article was published from the pen of 

 that gentleman, of which the following is an abstract of the 

 strata and depth, in the words of the article to which allusion 

 is made:" — Dr. Houghton's Notes.] 



