T. S. Hunt on the Geology of Eastern New Englond. 85 
When, however, further investigation showed that the great 
and progressive thickening which takes place in the paleozoic 
formations from the west, eastward, is not confined to the aug- 
mentations of existing subdivisions, but includes the intercala- 
tion of new ones; when the few hundred feet of typical Pots- 
dam sandstone in New York are represented in Vermont, 
Quebec and Newfoundland, by thousands of feet of strata 
lithologically very unlike the type; while the Quebec group, 
not less in volume, appears representing the beds of passage 
between the Calciferous and Chazy divisions of New York, we 
begin to conceive that conditions of sedimentation, very unlike 
— hitherto suspected in the west, prevailed to the east- 
ard. When, moreover, we find widely separated areas of 
faanseacan and Huronian rocks,—remaining fragments of great 
series,—resting upon the Laurentian, from Lake Huron to New- 
foundland, we get evidences of a process of Sete in past 
ages, not less remarkable than the sediment 
My oo of last year have fet i me oi a conclusion, 
which had previously been taking shape in my mind, that there 
exists above the Tacreasen a great series of crystalline schists, 
including mica-slates, staurolite and chiastolite- schists, wi 
quartzose and hornblendic rocks, and some limestones, the 
p- This in 
ness of several fond feet, is terminated a calcareo-mica- 
ceous schists, in which Eozoon Canadense has been found, both 
in Madoc and in Tudor. In these localities, as shown by Daw- 
son and Carpenter (this Jour, Il, xliv, 367), the calcareous 
