PETROGRAPHIC GEOLOGY AND DESCRIPTIONS. 761 



Sandstone. Taconyte. Wad. Iron ore.] 



No. 1690. SANDSTONE. 



Bottom of shaft No. 2, at the Cincinnati mine, sec. 2, T. 58-16 W. 

 Ref. Annual Report, xxi, pages 119, 155. 



Meg. A disintegrated sandstone, composed of rounded, iron-stained quartz 

 grains. No section. 



Age. Animikie (Pokegama quartzyte). u. s. G. 



No. 1691. SANDSTONE. ( Fen-ugirwus. ) 



" Form showing the penetration of iron into this quartzyte, hardened and reddened, Cincinnati mine." 

 Sec. 2, T. 58-16 W. 



Ref. Annual Report, xxi, page 155. 



Meg. Same as No. 1690, but cemented by iron ore, both limonite and hematite. 

 No section. 



Age. Animikie (Pokegama quartzyte). u. s. G. 



No. 1692. TACONYTE. 



" Taconyte from a shaft on the Cincinnati mine." Sec. 2, T. 58-16 W. 

 Ref. Annual Report, xxi, page 155. 



Meg. Yellowish, grayish and brownish, fine-grained, cherty taconyte, with 

 some limonite. No section. 



Age. Animikie (iron-bearing member). u. s. G. 



No. 1693. TACONYTE. 



" Ditto, from the Duluth Ore company (Berringer)." 

 Ref. Annual Report, xxi, page 155. 



Meg. Rather soft, gray, granular taconyte cemented in bands by silica and 

 iron ore, much of which is magnetite. No section. 



Age. Animikie (iron-bearing member). u. s. G. 



No. 1694. WAD. 



Shaft No. 23, Biwabik mine, ninety-four feet down. 

 Ref. Annual Report, xxi, page 155. 



Meg. Soft, black, crumbling bog manganese. Gives off water in closed tube. 

 No section. 



Age. Auimikie (iron-bearing member.) u. s. G. 



^ No. 1695. IRON ORE. 



Shaft No. 25, Biwahik mine. 



Ref. Annual Report, xxi, page 155. 



Meg. Hard, massive hematite, also softer hematite, somewhat brecciated, and 

 limonite. No section. 



Age. Animikie (iron-bearing member). u. s. G. 



