CATARACT CAtfON 8ECTION. 59 



d, 50 feet. Fine grained, incoherent, ochre-brown sandstone. 



e, 43 feet. Light colored, arenaceous shale. 



f t 10 feet. Dark gray limestone, very compact and hard, containing 

 crinoids. 



<7, 40 feet. Soft, friable, drab sandstone. 



hj 30 feet. Compact, drab, fossiliferous limestone. 



ij 75 feet. Fine grained, heavily bedded, friable, lavender-buff sand- 

 stone. 



.;, 12 feet. Drab, argillaceous, arenaceous shales, containing vermiform 

 concretions of chalcedony. 



&, 18 feet. Friable limestone, largely composed of crinoid stems, &c. 



I, 10 feet. Buff and lavender, fine grained, incoherent sandstone. 



m, 15 feet. Very low, compact, drab limestone, heavily bedded, and 

 filled with fragmentary fossils. 



n, 12 feet, Marly, buff, crinoidal sandstone ; Productus, Spwifer, &c. 



o, 42 feet. Fine grained sandstone, buff to drab at top, brown at base. 



p, 6 feet. Dark gray limestone, containing Productus, Spirifer, Chae- 

 tetes, &c. 



q, 40 feet. Fine, light brown sandstone, massively bedded, changing 

 to shale at base. 



r, 25 feet. Very hard, compact, blue limestone. 



5, 4 feet. Blue, argillaceous shales, containing a branching Cfatetes, 

 Productus, &c. 



t, 2 feet. Hard, buff limestone. 



% 60 feet. Friable, fine grained, buff sandstone. 



v, 22 feet. Hard, bluish drab limestone, with concretions of red chal- 

 cedony. 



w, 75 feet. Light buff sandstone, very fine and incoherent ; in part 

 calciferous. 



aj, 50 feet Hard, concretionary limestone, with nodules and thin seams 

 of chalcedony. 



y, 15 feet. Fine buff sandstone. 



#, 50 feet. Very hard, dark drab limestone, containing siliceous con- 

 cretions. 



