MINERAL RESOURCES OF THE STATE OF NEW YORK I43 



Pine Plains. The deposit is reported to consist of 2 or 3 small veins 

 which lie along the contact of limestone and schist. The ore is 

 rather lean, carrying small amounts of galena with some chalco- 

 pyrite, sphalerite and occasional barite, in a gangue of calcite and 

 quartz. The property has been explored on an extensive scale, as 

 evidenced by the shafts and underground workings and the large 

 accumulation of waste, but the operations were never profitable. 

 The galena contains a little silver. 



Additional occurrences of galena have been recorded in various 

 parts of the State. Near Smithfield, town of Northeast, Dutchess 

 county, is a small vein that has produced some ore; it is reported 

 to have been worked as early as 1740 and the ore shipped to Bristol, 

 England, and again during the Revolutionary War, when a few tons 

 of lead were produced. Another locality is Ossining, Westchester 

 county, where galena occurs with other lead minerals in dolomitic 

 limestone. At White Creek, Washington county, it is found in 

 small stringers in slate. In Montgomery county, i^ miles south of 

 Sprakers Basin, veins of galena associated with sphalerite and 

 pyrite are found in shale. Other localities are Schoharie, Schoharie 

 county; Martinsburg, Lewis county; towns of Vernon and West- 

 moreland, Oneida county; and near Rochester, Monroe county. 



References 



Beck, L3wis C. Mineralogy of New York, 1842 



Enunons, Ebenezer. Geology of New York. Report on the 2d Dist., 1842 

 Mather, W. W. Geology of New York, Report on ist Dist., 1843 

 Smyth, C. H. jr The Rossie Lead Veins. School of Mines Quarterly, July 1903 

 Whitlock, H. P. Minerals not Commercially Important. N. Y. State Geol. 

 23d Ann. Rep't, 1904 



MANGANESE ORE 



The manganese compounds that serve as ores of manganese have 

 only a very restricted representation in the State. The two com- 

 moner minerals are pyrolusite, the dioxide, and psilomelane, the 

 hydrous oxide. The latter contains usually more or less iron and 

 grades into an impure earthy substance called wad. There are no 

 considerable deposits of pyrolusite anywhere in the State; in fact 

 it may be said that there are no deposits in which the mineral is 

 found by itself, and only such minor quantities as may be present 

 in the superficial coatings of pyrolusite on other minerals. Psilo- 

 melane is found in greater abundance but of a low grade of quality. 



W. W. Mather in his reports on the First Geological Survey of 



