G. U. Kinahan — Irish Grcmitic Rocks. 
375 
The autlior clescribed tlie occurrence in the northern park of Nova 
Scotia of a great band of Silurian deposits, running nearly east 
and west, and traversed in a corresponding direction by numerous 
detached bands of granites, Syenites, etc. Roughly parallel to the 
line of the latter there is a tolerably well-defined series of fractures 
running from Parrsboro on the Bay of Fundy to Guysboro on the 
Atlantic coast. The course of this line of disturbance is marked by 
metamorphism, and by the presence of associated ores of iron and 
copper. The principal localities where the latter occur are noticed 
by the author, who states that the copper deposits attain their 
greatest development near Lochaber Lake and Polson’s Lake, 
where they form a series of veins, cutting at oblique angles black 
and red shales and quartzites, apparently of somewhat doubtful age. 
The quality of the ore is said to be good. 
13. “Glacial Drift in the North-eastern Carpathians.” By R. L. 
Jack, Esq., F.G.S., and John Home, Esq., F.G.S., of the Geological 
Survey of Scotland. 
In this paper the authors noticed the Statements of previous 
observers as to the occurrence of glacial drift in the northern part 
of the Carpathian ränge, and described the rock-formations sur- 
rounding the head waters of the Theiss, and soine drift sections 
observed in the valley of that river. They arrived at the following 
conclusions : — Glacial deposits are not abundantly developed in the 
valleys of the north-eastern Carpathian. The drift in the upper 
reaches of the Theiss is of the most fragmentary character, and is 
confined mainly to the broader portions of the valley. There is, 
however, sufficient evidence for maintaining that the Theiss valley 
was filled with a glacier upwards of 45 miles long, although the 
authors were unable to determine whether this glacier ever debouched 
on the plains of Hungary or ever reached the edge of the Carpathian 
chain ; but they think it probable that such was the case. 
14. “ On Terminal Curvature in the South-western Counties.” 
By W. A. E. Ussher, Esq., F.G.S., of H.M. Geological Survey. 
The author discussed the views advocated by Mr. D. Mackintosh 
on the terminal curvature of slaty beds (Q. J. G. S. vol. xxiii. p. 
326), and objected to the hypothesis that the phenomenon was pro- 
duced by the action of ice in any form, which was the agency to 
which Mr. Mackintosh was most inclined to ascribe it. The author 
thought that what has been called terminal curvature might be pro- 
duced by three distinct causes, namely, — 1. The curvature produced 
by internal movements at great depths, afterwards rendered super- 
ficial by long subsequent denuding agencies ; 2. The action of 
wedging frosts on the upturned edges of the beds as advocated by 
Mr. Godwin- Austen ; and 3. The intrusion between the laminse of 
the rocks of the roots and rootlets of growing trees. 
15. “ On the Chronological Classification of the Granitic Rocks of 
Ireland.” By G. H. Kinahan, Esq., M.R.I.A. Communicated by 
Prof. Ramsay, F.R.S., F.G.S. 
The author adopts Scheerer’s definition that a grcinite is a rock 
of certain Constitution, in which all the constituents are separately 
