ROCKS. 



11 



Namee. 



S3 Slaty limestone. 

 34 Slaty limestone. 

 85 Slaty limestone. 

 36 Slaty limestone. 



Localities. 



Williamstown, Massachusetts. 

 Cortland, Westchester. 

 Ashford, JVEassachusetts. 

 Stanford, Putchess. 



37 MfcA slate (with garpets), Dover, Putcheas. 



38 Mica and ta^cy slate. Amenia, Dutchess, 



39 Slate. 



40 Talcose slate, 



41 Slate (black), 



42 Slate (green). 



Montrose, Dutchess. 

 Near Peekskill, Westchester. 

 Clinton, Dutchess. 

 Clinton, Dutchess. 



43 Mica slate (the alum rocks). Near Ameniaville, Dutchess. 



44 & 45 SijATE. 



46 Slate (green). 



47 Taloose slate. 



48 Talcose slate, 



49 Slate. 



60 Micaceous slate. 



51 Talco-micaceotjs slate. 



52 Chlorite slate. 



53 Purple s];,ate. 



54 - 57 Slate. 



Near Canaan centre, Columbia. 

 Near Washington-hollow, Dutchess. 

 Canaan-gap, Columbia. 

 Hillsdale, Columbia. 

 Hillsdale, Columbia. 

 Taghkanic falls, Kensselaer. 

 Richmond, Vermont. 

 Canaan, Columbia, 

 Petersburgh, Rensselaer. 



Hoosick, Rensselaer, 



58 Talcose slate (greenish). Saddle mountain, Massachusetts. 



59 Talcose si^ate. Taconic mountain, Rensselaer, 



60 Talco-fibkous slate. Taeonic mountain, Rensselaer. 



61 Mica slate, Taeonic mountain, Rensselaer. 



62 Slaty sajsisj.one. V/illiamstowD, Massachutetts. 



63 Crystalline quartz (veins in slate). Ancram, Columbia. 



64 Crystalline quartz (with copper ore). Washington, Dutchess. 



65 Quartz in chlorite (with oxide of manganese). Taeonic mountain. 



66 Carbonate of iron. Stockbridge, Massachusetts. 



67 Limestone (with iron ore). Stockbridge, Massachusetts."^ 



68 Talc and mica cemented by oxide of iron. Stockbridge, Mass. 



69 Hematitic iron ore (stalactitic). Stockbridge, Massachusetts. 



