838 



APPENDIX. 



found the metalliferous surface of Missouri. There are but few 

 traces of mining, and those of an exceedingly ancient character, 

 in the copper region of Lake Superior. The excavations in search 

 of lead ore on the Upper Mississippi do not date back many years, 

 but the indications are such as to show that few countries, even 

 Missouri, exceed them in promises of mineral wealth. 



I have emplo3"ed the lapse of time between the termination of 

 the exploration and the present moment, to extend my mineralo- 

 gical observations to some parts of the Mississippi Yalley which 

 were not included in the line of the expedition, but which were 

 visited in the following year, in the service of the Government, 

 namely, the Miami of the Lakes, and Wabash Valleys, the Cave 

 in Kock Eegion in Lower Illinois, and the Valley of the Kiver 

 Illinois. The whole is concentrated in the following notices : — 



Tabular Vleio of Minerals observed in the Northicest. 



Genera. 



r 



Metallic 

 minerals 



Copper 



Lead 

 Zinc 



Iron 



, SilTcr, 



I. OEES. 



Species. Subspecies. Varieties, 



{Native copper. 

 Green carbonate of copper , . . . -j r'„n,„„gl 



. Sulpburet of lead Common. 



. Sulphuret of zinc Blende. 



f ( Common. 



I I Radiated. 



Sulphuret of iron -] Spheroidal. 



I 1 Cellular. 



I [ Hepatic. 



. -] Magnetic oxide of iron Iron sand. 



I Specular oxide of iron. Micaceous, 



iOchrey. 

 Scaly. 

 Compact. 

 [ Brown oxide of iron Ochrey. 



