28 



NEW YORK STATE MUSEUM 



CORTLAND 



The Devonian rocks of this cotinty do not include mineral 



DELAWABE 



<Se« Cortland 



DUTCHESS 



DESCRIPTTON 



33 



33a 



34 



35 

 36 



37 



Amenia 



Manhattan mine, Sharon Station | 

 Amenia mine, Amenia j 



Beekman 



Sylvan Lake mines, near Sylvan Lake 



limonite . 



turgite 



siderite. ... 

 chalcopyrite 



limonite. 



Dover 



Dover Plains marble quarry. 



38 



39 



40 

 40a 



Deuel Hollow mine 2m. s.e. South Dover 

 Dover mine, Dover Furnace station. . . 



East FishkiU 

 Pecksville 



FishkiU iron mines East FishkUl. , 



Northeast 



near Smithfield 



Riga Mine, Mount Riga 



Malby mine, H m. n.e. Millerton 



dolomite.. . 

 amphibole . 

 limonite. . . 



staurolite. . 

 garnet 



graphite. . . 



talc 



amphibole . 



pyroxene . . 

 limonite . . . 



chalcocite.. . 

 chalcopyrite. 



galena 



sphalerite. . . 

 Umonite. . . . 



massive. . , 

 tremolite. 



small crystals 



small red and brown crystals. 



foliated and granular 



gray and white of uneven structure 

 pale green actinolite and hydrous 



anthrophyllite 



augite 



