3O0 



NEW YORK STATE MUSEUM 



supply the mineralized solutions themselves. The main feature of 

 economic interest in the discussion of origin is that the Edwards 

 ores are not surface accumulations or shallow-vein deposits and 

 that any part of the limestones which have escaped erosion may be 

 considered as possible ore-bearing ground. Thus the progress of 

 mining in depth should not be accompanied by any marked change 

 of character in the ores, or in the possibilities of ore occurrence so 

 long as the limestones themselves continue. 



THE SHAWANGUNK ZINC DEPOSITS 



The revival of interest in the Shawangunk zinc belt has indicated 

 the need for a study of the ore occurrences of which the only available 

 information is to be found in the brief notes by Mather and Beck 

 included in their reports of 1842 and 1843, at the time the first 

 mining was in progress. It is hoped such study may be undertaken 

 in the near future. Meanwhile, the present account has been 

 prepared from the observations made during a brief visit to some 

 of the recently reopened workings, prompted by the current interest 

 in the subject. 



Shawanqunk. 

 Gril- 



Unconformity 



Silurian 

 Lime5toi\es 



Binncwater ) vHigK Falls 

 Sandstone Shale 



Hudson RiVfic 

 Slate 



Generalized section across Shawangunk mountain 



General features. The Shawangunk mountain is a single ridge 

 which in its development in New York State extends from Port 

 Jervis on the Delaware river northeast to High Falls, 10 miles 

 southwest of Kingston on the Hudson. It is physically a continua- 

 tion of Kittatinny mountain of New Jersey and Pennsylvania, a 

 part of the Appalachian system. The mountain faces the Catskill 

 plateau from which it is separated by a deep valley that is drained 

 in part by Rondout creek into "the Hudson and in part by the 

 Neversink which flows into the Delaware. Its slope on this side 



