764 THE GEOLOGY OP MINNESOTA. 



[Taconyte. Silica-kaolin. Flint. Hematite. 



No. 1703. TACONYTE. 



Security mine, near Virginia. 

 . Ref. Annual Report, xxi, page 155. 



Meg. Gray, granular taconyte containing blotches of limonite, which is in part 

 weathered out, leaving roughly-rounded cavities. No section. 



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



\ 



No. 1704. SILICA-KAOLIN. 



Mesabi mountain. 



Ref. Annual Report, xxi, page 155. 



Meg. Soft, white, greasy rock, similar to Nos. 1700, 1701 and 1702, but not 

 banded. See under No. 1701. No section. 



Age. Animikie (iron-bearing member), or Cretaceous kaolin. 



No. 1704A. FLINT. 



From No. 1704. 



Ref, Annual Report, xxi, page 155. 



Meg. Rounded flint pieces from No. 1704, apparently jaspilitic quartz. Nosection. 

 Age. Animikie (iron-bearing member), or Cretaceous kaolin. u. s. G. 



No. 1705. TACONYTE. 



Virginia mine. 



Ref. Annual Report, xxi, page 155. 



Meg. Hard, gray, granular taconyte with streaks and blotches of limonite and 

 red taconyte. The specimen is porous, due to the weathering out of part of the 

 limonite. No section. 



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



No. 1706. HEMATITE. 



Probably from the Virginia mine. 



Ref. Annual Report, xxi, page 155. (Compare No. 1939.) 



Meg. Soft, granular hematite. Scattered through the specimen are minute 

 specks of white, kaolin-like material. One side of the specimen shows a con- 

 glomeratic or brecciated structure. No section. 



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



Remark. This rock has some resemblance to the volcanic ash No. 1939, from 

 the Gogebiq iron range, but is much more highly charged with iron ore. N. H. w. 



No. 1707. HEMATITE. 



Virginia, Mesabi range. 



Ref. Annual Report, xxi, pages 132, 155. 



Meg. A crucial specimen from the Virginia, taken so as to show the transition 

 between the ore and the rock, there being a gradual change from the rock to the 

 hematite of the range. 



