APPENDIX. 1.Y7 



-\ Localities of Minerals observed in the northwest in 

 188] and 1^32. 



B1 HRHRY R. SCHOOLCRAFT. 



CLASS I. Bodies not metallic, containing an acid. 



1. Calcareous spar, Keweena Point, Lake Superior. Imbedded 



ID small globular masses, in the trap rock; also forming veins in the 

 formation. Some of the masses break into rhombic forms, and 

 J a certain but not perfect degree of transparency ; others aro 

 opaque, e,r discolored by the green carbonate of copper. Also in the 

 trap rock between Pond du Lac and old Grand Portage, Lake Supe- 

 rior, in perfect, transparent rhombs, exhibiting the property of doublo 

 refraction. ^.Iso, at the lead mines, in Iowa county, in the marly clay 

 formation, often exhibiting imperfect prisms, variously truncated. 



2. C Mouth of the River Brule, of Lake Supe- 

 rior. In small, friable, broken masses, in the diluvial soil. Also, in the 



below the Falls of St Anthony. In detached, vesicular masses, 



•'<. C"-:rACT CARBONATE of lime. In the calcareous cliffs of hori- 

 zontal i. commencing a t the Falls of St. Anthony. Carbon- 

 ifero 



J. Srttaria. In the reddish clay soil, between Montreal River, 

 ami L . Lake Superior. 



■"'• ( I mdstone rock at the Point of Grand Sablo 



>r. In orbicular masses, firmly imbedded. Not 

 lank Granular, also imperfectly foliated. 



6. Carbonate op magnesia. Serpentine rock, at Prcsquo Isks 

 Lake Superior. Compact. 



7. HYDRATE of M I With the preceding. 



CL VSS II. Earthy eompounds t amorphous or crystalline. 



/.. Huron Islands, L;ike Superior, also the ad- 

 join.:. In very large veins or !■■ da, White, opaque. 



lis of Peckagaaia, Upper Mississippi. 



1". SNORT QUARTZ. In the trap rock Kewcens Point, Lake 8 

 rior, crystallized. In connection with amethystine quartz. 



3] 



