Geology and Mneralogy of Salisbury. 257 
iy (Juariz—In amorphous eres _The best speci- 
mens are found in mica-slate, in which it fo orms veins of %. 
considerable thickness, and often exhibits a beautiful melee 7" 
"Yellow Quartz—In rolled masse = 
Rose red Quartz—In detached ae color of different 
shades, tinged with yellow. 
_ frised Quartz—Rare—colors produced by frasinre, at and 
a coat of metallic oxide. i 
Milky Quartz—Common in large masses. 
Granular Quartz—Occurs in masses of consi siderable size 
not met with as a rock. Many of the preceding vareie 
are cellular—cavites of various forms—-appear to have 
been produced by the decomposition of other crystals. 
Ferruginous Quartz—Amorphous—beautiful specimens __ 
of an ochrey yellow, and deep red color are associated. 
‘Fetid Quartz—V ery abundant—resembles the common 
quartz, tinged with gray. Some specimens are so fetid 
that a single stroke of the hammer will nearly fill a room 
with the odour. 
Siliceous Sinter-—~Abundant, gaycating the surface of | 
Hornstone, in botryeidal concre ” 
Hornstone—Occurs in amor one masses—one which 
i found weighed above a ton. It iescaes that found in 
Litchfield, and has the same associatio 
Jasper—Of various colors, black, col yellow, &c., in 
small rolled masses—sometimes ofa slaty structure: Some- 
times it is met with in the shape of barbs for arrows; but 
hornstone and flint were more commonly employed by the 
Indians for this purpose. w years since nearly a peck 
of these barbs of differe Se and formed for different 
warlike weapons, were | up at one time. They 
are very abundant in the north eit part of the town. 
, Staurotide—Associated with garnets in. mica-slate—six 
other at the usual nile of 60° and 120° sometimes 
three prisms cross, forming six equal gh Crystals 
Mostly small. 
Vor. VHI.—No. 2. $3 
