250 Granitic veins and beds in Chester, Muss. 
quartz found in the mine, and is often beautifully foes? 
with malachite in dendritic form 
Fetid Quariz, Forms a pet for the blende. 
7. Puddingstone. Yn considerable masses, Wt: cae 
the argillite. 
ay. Ofa grayish color, produced by the decom- 
position of the slate 
9, Sulphuret of Iron. In small cubes in the areuitey and 
also amorphous. & 
Salisbury, Jul 18, 1824, 
Art. 1X.—Notice De theGranitic veins and beds in Chester, 
Mass. by E, Emmons. 
Custer, Juty 8, 1824. 
in aie: about, Chester is hilly 
d mo DUS, I o abrupt. precipices of various: 
heights, from 10 to 50 or 80 feet in perpendicular elevation. 
The direction of the rock strata and hills is N. aud aud S. 
an inclination of only a few degrees to the E. or W 
in some places, as in deep vallies, the strata are verti 
The principal rock is mica-slate of fine and nearly compact 
structure. Jt breaks into rhombic fragments of various 
sizes, having sharp and well defined edges. Imbedded i 
the rock are garnets ofthe size of small shot, etanrot 
and cyanite. In many strata these minerals constitute b 
far the largest portion of the rock. Ir 
oa. face. of the. country 
the rocks of Chester, the attention of the geologist is at 
tracted to the number and variety of the granitic beds us 
veins. The granite is gray and of a coarse texture, Con- 
taining in many instances large blocks of feldspar’ and 
quartz. The plates or tables of mica are often beautiful 
and are portions of regular crystals. The quartz is always 
strongly fetid, while the feldspar in immediate contact is 
inodorous. The quartz is often beautifully pense y ; 
insulated tables of mica. There are several positions 18 
which the granitic beds and veins are found. pai 
(see fig. T. pl: I.) which I shall notice, isa horizontal y 
