920 J.D. Dana—Taconic Rocks and Stratigraphy. 
the region is there given from a manuscript map by Mr. Joseph 
S. Adams. No good sections showing positively the relations 
of the quartzyte to the limestone exist about the areas. 
g. The ridge in eastern Canaan, Q Q Q, consists of quartzyte, 
part of it of the hard massive kind, and part thin-bedded and 
more or less micaceous. ‘“ Hard-heads,” or bowlders of quartz- 
yte, are common over it, but little of the rock is in place owing 
to the depth of disintegration of the porous rock. At the 
locality in East Canaan, where the Connecticut Western R. BR. 
crosses Whiting River and the carriage road, a deep section 
exposes to view the quartzyte—a very thinly laminated fragile 
rock, easily crushed by the hand to sand; its dip at the west 
end of the exposure is 25° E., but to the eastward it becomes 
horizontal and westward in dip. No outcrops of limestone 
occur in the vicinity. 
h. The part of Sheffield and of the town of New Marlbo- 
rough, lying to the north of Canaan, have several north and 
south ridges of quartzytic mica schist (as is indicated on the 
map), which are part of the system that extends from Canaan 
northward through Berkshire. Ihave not found, in the region, 
examples of limestone and overlying quartzyte in close or near 
over their slopes. Good sections occur in the towns next north, 
and will be described in part II of this paper. 
III. The stratigraphical continuity of the limestone, and also of 
the beds overlying 1. 
The facts which have been presented show that the lime 
stone of the town of Salisbury, is plainly a single stratum oF 
formation, normally underlying, and therefore older than, the 
schist of the region. Hae 
Again: topographical, stratigraphical and lithological facts 
lead to the similar inference that the schist of Mt. Washingto® 
—or the Taconic schist—is one in stratum with that of the 
various ridges over Salisbury that diverge from this mountain 
mass and in other cases lie parallel to it. oe 
This limestone continues into Canaan and the towns north; — 
* In my article of 1872, referred to above, I make the quartayte older than a 
The evidenze adduced is not conclusive, er 
did not depend on a section showing superposition. The argument from of 
jointed structure and non-bedded character of the quartzyte, and me ee have 
join 
any corresponding features in the limestone, is set aside by many 
since observed. 
