f'HITTENANGO WELL AND SECTION. 99 



Depth. Thickness. Kind of rock. Formation. 



Feet. Feet. 



644 11 Dark gray and rather pinkish chips, 

 which effervesce strongly in cold HC1 

 and contain hematite ii-on ore ; some 

 greenish, argillaceous, non-calcareous 

 shale Clinton " iron-ore bed." 



655 225 Green argillaceous shale, non-calcare- 



ous ; brachiopod shells at 800 feet. . . Clinton. 



880 10 Greenish to greenish-gray chips, not so 



argillaceous and scarcely calcareous ; 

 a few reddish chips like iron ore .... " 



890 12 Greenish quartzitic chips mixed with 

 green argillaceous shale ; a good many 

 white, vitreous, angular chips that are 

 apparently quartz grains Medina. 



902 4 Mainly chocolate-red chips of sand- 



stone (?) mixed with white quartz 



grains " Gray band " (?) of Me- 



dina. 



906 48 Greenish argillaceous shale and sand- 

 stone mixed with white vitreous 

 grains of quartz Medina. 



954 456 Mainly brownish-red quartzose sand- 



stone, with some greenish-gray sand- 

 stone and argillaceous green shale ... " 

 1,410 107 Greenish-gray quartzose sandstone,with 



some bluish shale Oswego sandstone. 



1,517 640 Mainly blue argillaceous shale, with 



some bluish-gray arenaceous shale or 



sandstone Lorraine or II u <1 s o n 



shale. 

 2,157 233 Blackish argillaceous shale ; streak 



slightly brownish Utica shale. 



2,390 60 Blackish argillaceous shale, with brown 

 streak, but mainly gray calcareous 

 chips ; at about the top of the Trenton 

 limestone " " 



2,450 50 Clear sample of dark blue limestone ; 

 strong effervescence in cold HC1 ; 

 undoubted Trenton Trenton limestone. 



2,500 390 Dark gray and light gray limestone, 

 with some dark blue limestone, 

 steongly calcareous ; fossils, brachio- 

 pods (Orthis ?), at 2,600 feet ; brachio- 

 pods at 2,710 feet Trenton. 



2,890 88 Moderately dark gray limestone ; fair 

 effervescence in cold HC1, but con- 

 taining a large amount of non-calcare- 

 ous material (argillaceous?) " 



XV— Rurx. Geoi,. Soc. Am., Vol. 4 1892. 



