148 DESCRIPTIONS OF MINERALS. 



Stone, and Christian counties, are in the (i Keokuk lime- 

 stone/'' of the Subcarboniferous period, but partly in Web- 

 ster, Taney, Christian, and Barry counties, in the Lower 

 Silurian " magnesian limestone ; " those of Central Mis- 

 souri, situated in Moniteau, Cole, Miller, Morgan, and other 

 counties, are mostly in the Lower Silurian "magnesian 

 limestone,'' but partly, as in Northern Moniteau, in the Sub- 

 carboniferous. The conditions in which the ore occurs in 

 Missouri confirms the opinion of Prof. Whitney, as to there 

 being no true veins. Mr. Adolf Schmidt, in his account of 

 the Missouri lead ores, says that the deposits contain red 

 clay, broken chert, from the chert bed, and portions of the 

 limestone beds, along with the lead ; that the barite was in- 

 troduced after the lead ; that some caves are filled through 

 all their ramifications, while others are only partly filled ; 

 and he adds that the same solvent waters that made the caves 

 and horizontal fissures or openings may have held the vari- 

 ous minerals in solution. In Derbyshire, England, the de- 

 posits contain fossils of Permian rocks, showing that, al- 

 though occurring in Subcarboniferous limestone, they were 

 much later in origin. 



Galenite also occurs in the region of Chocolate River and 

 elsewhere, Lake Superior copper region ; on Thunder Bay, 

 and Black Bay ; at Cave-in-Rock in Illinois, along with 

 fluorite ; in New York at Rossie, St. Lawrence County, in 

 gneiss, in a vein 3 to 4 feet wide ; near Wurtzboro' in Sul- 

 livan County, a large vein in millstone grit ; at Ancram, 

 Columbia County ; Martinsburg, Lewis County, X. Y., and 

 Lowville ; in Maine, at Lubec ; also of less interest at Blue 

 Hill Bay, Birmingham and Parsonsfield ; in Xew Hampshire, 

 at Eaton, Bath. Tamworth and Haverhill ; in Vermont, at 

 Thetford ; in Massachusetts, at Southampton, Leverett, and 

 Sterling, but without promise to the miner ; at Newbury- 

 port, Mass., in a vein which is now worked ; at Middletown, 

 Ct.. formerly worked as a silver-lead mine ; in Virginia, in 

 "W ythe County, Louisa County, and elsewhere ; in North 

 Carolina, at King's Mine, Davidson County, where the lead 

 appears to be abundant ; in Tennessee, at Brown's Creek, 

 and at Haysboro', near Nashville ; in Pennsylvania, at 

 Phoenix ville ; in Michipicoton and Spar Islands, Lake Supe- 

 rior. In Nevada it is abundant on TVatkins River, and at 

 Steamboat Springs, Galena district ; in Colorado, at Pike's 

 Peak, etc.; in Arizona, in the Patagonian Mts., Santa Rita 



