846 J. D. Dana—He'd rbery rocks in the Connecticut Valley. 
The quartzite, which overlies the hornblende rock, constitutes 
aridge just west of the road to Bernardston. commencing a 
short distance south of the village of South Vernon; one outero 
of it and of the conformable underlying hornblende rock was 
met with two and a half miles east.of Bernardston, between the - 
two railroad crossings. About two miles east of Bernardston, 
I took a road leading northward to “Purple’s slate quarry” 
(p, on the map), and found the slate identical in every respect 
with that of the Bernardston Crinoid locality—the same in tex- 
ture and in its imbedded crystals of mica and garnets. Its 
strike was northeast, and the dip 20° to the southeast. Thusa 
mica slate identical with that of Bernardston, and the horn- 
blende rock and quartzite characteristic of South Vernon, were 
found within two and a half miles of the old Bernardston local- 
final settlement of the question; and in an hour's excursion It 
was done. In September, I was over the ground again to point 
out the decisive localities to Prof. Hitchcock.* 
e facts are simply these :— "ak 
The Bernardston Helderberg locality (J on the 03 : 
ie 6 
lower stratum of the hornblende rock, constituting ledges 
short distance apart, there was an outcrop of mica slate, 14 he 
in all respects with that of the Bernardston Crinoid locality, ¢ 
small imbedded prisms of mica and dodecahedrous of red 83° 
Jated 
* Between these two visits, I learned that Prof. Hitchcock had contemp: 
examining the region this autumn. 
