84 TT. S. Hunton the Geology of Eastern New England. 
chiastolite, garnet and hornblende. These two series of rocks, 
extending from the base of the Green Mountains to Canaan 
on the Connecticut, it was suggested by Sir William Logan, in 
his Report on the Geological Survey, 1847-1848, might be the 
altered representatives of the rocks of Gaspé, including the 
Lower Helderberg group, and the succeeding members of the 
New York spate to the top of the Chemung. I then, as now, 
conceived that these micaceous and argillaceous schists, often 
holding garnets and chiastolite, were identical with those ‘which 
make so conspicuous a figure in the White Mountains, and else- 
where in Eastern New England, and when, in 1849, IT laid 
before the American Association at Cambr ridge, the results of 
the Geological Survey of Canada (this Jour., I, ix, 19), sug- 
vooke: of tha Green srs and from the fossiliferous Upper 
Silurian strata which lie at the southwestern base of the 
dian prolongation of the latter. Having thus exhausted the 
list of known sedimentary groups up to this horizon, it was evi- 
dent that the crystalline strata of the White Mountains must 
be either (1) of Devonian age, or (2) something newer (which 
was highly erg or ©): must belong to a lower and hith- 
erto unknown absence of any proof, at that 
time, of the selstente = oes a lower system, the first view, 
which referred these strata to the Devonian period, was the only 
one admissible. 
* In this connection should be recalled the views put forth in 1846, by Messrs. 
te: and W. B. Rogers, in a paper on the Geological Age of th the White- Mountains, 
mass of mo more or less alte 
upon the Mon seid su ic re: ney ref wi 
doubt, ton division of the on wid Silurian. In 1847, however, ped an- 
and y: 
organic life, hay of Reser. Fe Silurian 
