202 J. D. Dana— Geology of Vermont and Berkshire. 
ArT. XX VITL—On the relations of the Geology of Vermont to that 
of Berkshire ; by JAMES D. Dana. 
[Continued from page 140.] 
CONCLUSIONS AS TO THE RELATIONS OF VERMONT AND BERK- 
SHIRE GEOLOGY. 
presented under the following heads: 
1. Chronological conclusions: or the equivalence and age of 
the formations. 
2. Lithological conclusions. 
3. Orographic conclusions. 
And, asa sequel to this discussion, I propose, next, to pre- 
sent stratigraphical facts bearing on the geological relations: 
between the area which has been under consideration and the. 
country lying to the southward and eastward of it, in Connecti- 
eut and New York. 
I. CiHRonontocicaL ConcLusIoNs: OR THE EQUIVALENCE AND 
; F THE FoRMATIONS. 
1. Age of the: Limestone series as a whole.—From the facts 
brought forward it is manifest that the limestone, schists and 
quartzyte, making up the limestone series of Vermont and 
Berkshire, are continuous formations, and that they are con- 
Jormable throughout. Hence we have proof that the conclusions 
deduced for Vermont, from Mr. Wing’s discoveries, are true 
alsa for Berkshire: namely, that— 
(1.) The limestone series is made up wholly of Lower Silurian 
Jormations ; that is, of formations not older than the Primordial 
or Cambrian, nor newer than the Cincinnati or Hudson River 
