DESCRIPTIONS 



zose forma- ^* ^^^^^^LAR Q.UARTZ, coosists of grains of quartz united 

 tion. without cement. SubdivisionSe Compact^ when it consists 



of fine grains, so as to appear almost homogeneous ; generally 

 in large rhomboidal blocks. Sandi/, when the grains are so 

 slightly attached as to be somewhat friable. Varieties. — 

 Translucent, when it is so compact and homogeneous as to 

 transmit light. Yellow, when slightly tinged with iron (prob- 

 ably a carbonate.) Ferruginous, when an aggregate of mi- 

 nute crystals strongly coloured yellow or red with the carbon^ 

 ate or peroxyd of iron. There is a remarkable locality two 

 miles north of Bennington village, in Vermont. Large mas- 

 ses may be found consisting of six-sided crystals, ^with six-sided 

 pyramids on both ends. 



Localities. Compact, adjoining the east side of Saddle 

 Mountain Range. Sandi/, on the west side adjoining the 

 granular limerstone. Varieties. Translucent, Snowy Moun- 

 tains in Wallingford, Vt. Yellowish, most common. Ferru-- 

 ginous, Bennington, Vt Pittyfield, Mass. Contents. Hae- 

 matite, in Dalton, Massachusetts, three miles south of the vil- 

 lage. Manganese, in Bennington, Vt. 



1. Galea- 6. Granular Limestone, consists of glimmering grains 

 tkm!*^°'"^^ of carbonate of lime united without cement. Subdivisions. 



Compact, when it consists of grains of nearly pure carbonate 

 of lime, so closely united that it will take a polish. Sandy, 

 when grains of quartz are aggregated with the grains of car- 

 bonate of lime, but so loosely as to be somewhat friable. Va- 

 rieties. Dolomite, when it consists in part of magnesia, and is 

 friable. Verd-antique, when it is variegated in colour by the 

 presence of serpentine, giving it more or less of a clouded 

 green. 



Localities. Compact, Stockbridge, Mass. Sandy, west 

 side of Pittsfield, Mass., on the Albany stage road. Varieties. 

 Statuary Marble, Stockbridge, Mass. Dolojnite, Barrington 

 and Sheffield, Mass., Milford, Conn. Contents. Tremolite^ 

 Canaan, Conn, Serpentine and chromate of iron, Milford, 

 Connecticut. 



