Lyman.] ^"t> [^Nqv. 2, 



The following is a general section downwards of the rocks exposed on 

 the Parker or Lens creek tracts, so far as known : 



FT. IN. 



Gray sand rock about 8 



Hidden " 30 



Coat,, Pittsburgh Bed, 4,, 9 to 5,, 6, say " 5 



Hidden " 44 



Brownish-gray sand rock " 4 



Hidden " 14 



Slates "60 



Coal, Slate Vein, in two or three thin layers sepa- 

 rated by much clay, the upper one cannel, aver- 

 age, say "30 



Hidden " 190 



Brownish gray sand rock " 5 



Hidden " 105 



Coal, Wood's Upper Bed, with commonly about half 

 an inch of clay at about six inches below the top, 



2,, 6 (?) to 4,, 0, average, say "30 



Hidden "70 



Brownish-gray sandy shales and sand rock " 37 



Coal, Factory Bed, 0,, 9 to 3,, 8, with about two 



thickish layers of clay, average " 3 



Brownish-gray sandy shales " 21 



Hidden " 20 



Brownish-gray sand rock " 10 



Hidden "40 



Brownish gray sand rock " 12 



Coal, Wood's Lower Bed, commonly with a half-inch 

 seam of clay about five inches above the bottom, 



3,, 3^ to 4,, 0^, average, say " 3 8 



Slate floor of coal and hidden "23 



Coal, a very thin seam, say " 4 



Black slate "20 



Hidden " 24 



Brownish-gray sand rock " 12 



Hidden "60 



Brownish -gray sand rock " 5 



Brownish-gray sandy shales, sometimes with small 



iron ore balls " 15 



Coal, Jerrold's Bed, with sometimes a half-inch 

 layer of clay at about nine inches below the top, 

 sometimes one near the bottom also ; 2,, 8, or 



even less to 3,, 6, average, say " 3 



Brownish-gray sandy shales " 14 



Coal, Feeder's i?ed, perhaps "20 



640 



