SECOND ORDINARY MEETING, 19 
Prof. Ch. H. Hitchcock, in 1860, have clearly established the fact 
that there extends from the vicinity of Worcester, Mass., to the 
southern extremity of Rhode Island, a more or less broken belt of 
rocks of Carboniferous age ; and these writers all concur in describing 
these rocks as materially different from those of the best known coal 
fields. Instead of Bituminous coal or of Anthracite, we find there 
a plumbaginous Anthracite ; instead of the accompanying clays and 
clay-slates, we find clay-slates and Mica-schists. The southern portion 
of the belt, at least, is traversed by numerous Quartz veins, and all 
the rocks and minerals of the region indicate varying degrees of 
metamorphism. During the last few years the writer has devoted 
considerable time to the construction of a geological map of the 
vicinity of Newport, R. I., and of a geological section across the 
entire basin, which at that point measures some fifteen miles in 
width. Since the publication of the results of this work, in extend- 
ing during last summer the observations northwards, I came upon a 
locality where the metamorphism of the coal-measures had proceeded 
further than it is supposed to have done even in that region. The 
object of this paper is to give a brief statement of these observations. 
[In order, however, to show their general bearing the following condensed 
summary of the writer’s former papers on the stratigraphy of the vicinity of 
Newport is here given.* On either side of the basin we have areas of 
Protogine and Gneiss (A), and in the centre two isolated masses of stratified 
Protogine. Closely allied to this we have on the west side of the basin a long 
strip of Mica-schist (B), some of which contains rounded quartz pebbles, and 
is traversed both horizontally and vertically by veins of Granite. Not far 
from the juncture of the Gneiss and Mica-schist is a bed of granular Plumbago. 
A and B may be of Montalban or even of Huronian age. Then follow certain 
beds of Hornblende, Chlorite and Mica-schist (C), and of Epidote, and 
Chlorite-schist (D), which may be synchronous. A series of strata similar to 
C, and probably of Silurian age, occurs in Connecticut.+ 
The next series (E) consists of Chloritic Argillytes with passages of Calcite, 
nodules of Jasper and some thick layers of Dolomite. Its age is doubtful. 
* A contribution to the Geology of Rhode Island. Proceedings of the Boston Society of 
Natural History, Vol. XXII., Jan. 3rd., 1883. A contribution to the Geology of Rhode Island. 
American Journal of Science, Vol. XXVII., March aud April, 1884, (In the Section on EY 
VI. of this paper the unconformity between the Coal-measures and the Protogine should 
probably have been represented rather as a thinning out of the Coal-measures in contact with 
Protogine beds of originally conformable stratification.) Remarks on some of the evidences of 
Geological disturbance in the vicimty of Newport. Proceedings of the Newport Natural 
History Socicty, 1883-4. 
+See James D. Dana, On Rocks of Helderberg Era in the Valley of the Connecticut, etc. 
American Journal of Seienee, Vol. VI., p. 339, 1873. 
