ROCKS. 



13 



Names. 



108 Slate. 



109 Talco-slate (greenish), 



110 Slate. 



111 Green slate. 



112 Hematitic iron pre. 



113 Red chalk. 



114 S:f,ATY C^UART?. 



Localities. 



Williamstown, Massacjmsetts, 

 Richmond, Vermont. 

 Tftconic mountain. 



Stockbridge, Massachusetts. 

 Cortland, Westchester. 

 Wijliamstowp, ^jVIassachusetts, 



