re 
: gertostcal Notices. 95 
of Day’s meeting-house in Killingly. The stone is used, to a consid- 
erable extent as a flagging stone, and nothing but its distance from a 
water communication, prevents a much more extensive use of it, for 
this purpose. It splits out in layers from an inch to a fuot: in thick- 
ness, and of almost any size that may be desired. It is very rare, » 
that slabs containing one hundred square feet, do not exhibit to the 
eye,a perfectly plane surface. It dips about 15° to the north of west, 
and crops out wherever it is visible in place on the east side of the 
hills. The stratum, as seen at the quarries, has a thickness of at 
least three hundred feet, and probably much more. I was not able 
to find its junction with other rocks, which is concealed by diluvion. 
There are occasional thin partings of mica slate, in the stratum. 
About four miles from the quarries, this feldspar rock passes into well 
characterized kaolin. Some of the specimens shew the progressive 
nanges from feldspar rock (petuntzé), to porcelain clay. At this lo- 
cality, however, the clay does not seem to exist in sufficient quantity, 
to make it worthy of an exploration; but there are probably other 
beds in the range, that may perhaps be rendered available. 
The granular quartz rock, with fibrous arragonite, is the stratum to 
the east of the latter. My attention was first drawn to it, by seeing 
Itused in the towns around for hearth and jamb stones. It has not 
been regularly quarried, until within a few years. I am not positive 
that. this Constitutes more than a mere bed, as I did not trace it for 
more than half a mile. The dip and line of bearing of this stratum, 
48 well asall to the west of it, for thirteen or fourteen miles, are about 
from 10° to 15° degrees to the w. Nn. w. for the former, and N. N. E. 
and s. s. w. for the latter. " eh 4 
The gneiss in thick strata, may perhaps with more propriety be 
called granite, as the same stratum a few miles north, (at Atkins’s 
meeting-house in Killingly,) passes into well characterized granite. 
A ridge of contorted gneiss, extends some miles north and south 
of the line of section, between Killingly and Brooklyn, and it contin- 
ues to shew itself in place occasionally, so as to present a breadth of 
about two miles. The cliffs shew it on the large scale, but small 
ee not unfrequently shew it ina remarkably distinct manner. 
he zigzag and curve lines, pass in every direction, and the idea 
naturally occurs, that when in a soft state, the masses had been for- 
ced against, and bent and penetrated each other, in every direction. 
etween this and the preceding stratum, much of the gneiss is por- 
Phyritic. In B dyn, the gneiss sometimes almost passes into horn~ 
