ROCKS. 13 



Names. Localities. 



108 Slate. Williamstown, Massachusetts. 



109 Talco-slate (greenish). Richmond, Vermont. 



110 Slate. Taconic mountain. 



111 Green slate. 



112 Hematitic iron ore. Stockbridge. Massachusetts. 



113 Red chalk. Cortland, Westchester. 



114 Slaty quartz. Williamstown, Massachusetts. 



