an the vicinity of Great Barrington, Mass. 367 
_ }) Chioritic varieties of the mica or hydro-mica slate occur 
in Tom Ball and the Taconic Mountains, in some of which 
there is as much chlorite as mica. They sometimes contain 
(11) Tremotite rock. The Canaanite of Canaan, a coarsel 
granular rock, white to grayish-white in color, often mixed wit 
quartz and with limestone, and often containing scales of 
brown mica. Weathered specimens sometimes show the ends 
of crystals of tremolite. : 
_ (12) Clay-slate occurs alternating with quartzite and limestone 
im Williamstown, Massachusetts, and at Rutland and elsewhere 
im Vermont. That of the Taconic range west of Great Barring- 
ton lies mostly to the west of the mica or hydro-mieca slate of 
that range. } : { 
“aaa : 
appears to be almost solely the hydrous mica damourite; just such a rock has been 
recently described from ‘Galm-Chateaa, and called damouritic schist. Another 
analysis by Barker, not here cited, is of a chloritic variety. 
ee 4 
