STATE GEOLOGIST. 13 



XXIII. Qt*J andyoli Iteme. (Hubbard. 1S4 1, p. 128.) 



XXI I Shaiea and Doalof the " lower cod measures." (I)oug- 



i-io. p, 55 | Hubbard. 1844, i>. l. 

 XXI. Flee, compact^ slaty Banditone. (Hnbbard, 1841, p. 



136.) 

 XX. Gray limestone, lerock — 14ft. (Hnbbard, 



1841, pp. 125-180.) Douglass places tin 

 the and "Lower Coal," and says the Gyp 



sum is ftboTe, or embraced in it. (1840, pp. 02-67 ) 

 Tli.' Gypsum is also placed above by Houghton. 

 (1839, p. 11.) 

 XIX. r nous sandstones. (Hubbard, 1840, 



pp. 81-88.) Thinned out at Grand Rapids. (Hub- 

 bard, 1841, p. 138.) Snl divided as follows : 

 G. Coarse, quartzose, yellowish gray sandrock, 30 ft. 

 F. Asli colored, or brown sandrock, with marine 



.Is, 15 ft. 

 E. Dingy and green, finegrained strata, with occasional 



fossils and ferruginous spots. 

 D. Hard gray stratum of sandrock, 1 ft. 

 C. Dingy-green, finegrained sandstone, interstratified 

 with slaty sandstone, and apparently with blue 

 clay shale, 15 to 20 ft. 

 B. Yd: iliferous sandrock. Abounds in marine 



fossils. 20 ft. 

 A. Finegrained sandrock. 

 XVIII. Kidn.-y Iron Formation, 45 ft, (Hubbard, 1840, p. 86 ; 

 1841, p. l:»; Bough! '", p. 25.) Considered 



the' bottom of \\ . I 



XVIJ. S stone of Ft. anx Barques. I 



I underlies t ;; idy, 



though : (Hubbard, 1841, p 



ws : 



B ' e or partial conglomei Hub- 



bard, 1841, p. FJG.j 



