204 soo. D. Dana— Geology of Vermont and Berkshire. 
then, the Berkshire limestone of the middle and sonia half of 
the area may include the Calciferous, Quebee, Chazy a ren- 
ton formations, and perhaps also the Primordial; but, since there 
are no fossils to fix the precise age, the areas of these different 
formations in Berkshire cannot be se arately distinguished. 
4. The age of the Quartzyle formation, and its relation in position 
to the adjoining limestone.—The quartzyte formation includes, as 
one, and sometimes the other, acted The special age 
heats to the associated limestone—is well illustrated in 
Berkshire. Mr. Wing, in his explanations of the Vermont 
sections (pp. 410, 411 of the last volume of this Journal), makes 
this limestone to overlie the quartayte, and to be the equivalent 
of the “suberystalline limestone” which overlies the Red Sand- 
rock on. the west side of the limestone area—the quartzyte 
being in his view the same rock with the Red Sand-rock. It1s 
to be noted, however, that the sections themselves do not indi- 
eate aehettiar the limestone is over ying or anderly'0g and 
may be explained as well on one supposition as the other. 
In Berkshire, beyond all reasonable doubt, the sake, genie 
formation overlies the adjoining limestone. 
e most distinct and positive proof of the superposition of 
the quartzyte over limestone that I have observed is that 
Three-mile S eaaan went mre 
of Konkaput Valley. 
3 
tees) 8 Beets — side of ‘takin valley. 
afforded by sections either side of a apcone Fs locality 
brought to my attention, as I state in my memoir of 1 1872-8, 
by Dr, R. P. Stevens. The figures of the atone of Devany’s 
