L. 8. Hunt on the Criticisms of Prof. Dana. 51 
hornblende-slate to tale-slate and chlorite-slate ; G. Rose [iti, 312]. 
Mica-slate to tale-slate, and steatite and mica to serpentine, 
steatite and tale; Blum, C. Gmelin [ii, 405, 468]. Quartz-rock 
to steatite; Blum [ii, 468]. 
With regard to New England rocks, Prof. Dana asserts that 
“there are gneisses, mica-schists, and chloritic and talcoid schists 
+ 
in the Taconic series.” I have, however, shown in my address 
made up from the ruins of the primary schists, and distinguished 
from these by thé absence of the characteristic crystalline min- 
erals which belong to the Green Mountain primary schists. 
Again, Prof. Dana states that I make the crystalline schists 
of the White Mountains a newer series than the Green Mount- 
ain rocks. A careful perusal of my address will show that I 
nowhere assert that the rocks of the third series, on my line of 
section, are younger than the second series. Such a view of 
their relations has, however, been maintained for the last gene- 
tation by the Messrs. Rogers, Logan, and many others, all of 
Whom assigned the crystalline schists of the White Mountains 
to a higher geological horizon than the Green Mountains. Tn 
Support of this view of their relative antiquity, I have, it is 
“ae, brought together observations from South Carolina, Penn- 
sylvania, Michigan, Ontario, and Maine, all of which point to 
the same conclusion; and I might now add similar evidence 
from New Brunswick and from Nova Scotia. My “chrono- 
logical arrangement” of New England crystalline rocks, as it is 
called by Prof. Dana, so far as it is my own, is limited to my 
. n 
directly overlaid by unerystalline shales, sandstones and con- 
glomerates, made up in part of the ruins of these, and holding 
