File:The Quarterly journal of the Geological Society of London (13365526403).jpg

352 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. .March 13,
Cobequid Bay.
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point to which we have already traced its southern boundary), it forms
a broad and irregular tract of metamorphic country. Westward of
this tract it is again subdivided ; one branch extending near the
margin of the granitic group, on the south side of the Stewiacke Riyer,
as far as the Shubenacadie River ; another
extending for a short distance between the
Stewiacke and Salmon rivers ; and a third,
or rather a group of detached masses, ex-
tending through Mount Thom to the eastern
extremity of the Cobequid range of hills.
In the hilly country connected with Moimt
Thom, and in the vicinity of the upper
parts of the Salmon, West, and Middle
rivers, considerable breadths of lower carbo-
niferous strata'^ have been partially meta-
morphosed, and invaded by greenstone and
other igneous rocks. A mass of granite, con-
taining dark grey felspar, abundance of black
mica and very little quartz, occurs on the
east side of Mount Thom.
The Cobequid hiUs, extending nearly in
an east and west direction for about ninety
miles in that part of Nova Scotia h*ing north
of the southern ami of the Bay of Fundy,
must be referred to the metamorphic group
now under consideration. Both its strati-
fied and hypogene rocks are similar to those
of the parts of the syenitic group already
described. Fossils are absent or veiy rare
in those parts of it which I have explored.
I have found only a few fish-scales, and
fragments of a Productus or Orthis in cal-
careous bands associated with black slate
and brown quaitzite, near its eastern extre-
mity. As the boundaries and general cha-
I g racters of the Cobequid range have long
since been described by Dr. Gesner and
others, and as I have in a former paper f
noticed the structm-e of its eastern part, I
shall at present confine myself to a descrip-
tion of the section of its central portion,
afforded by the Great Tillage, Folly, and
Wallace rivers, and the roads in their vici-
nity. (See Section, fig. 3.)
On the northern side of the hills, near the post road from Truro
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Northumberland Strait.

• In the map attached to my paper on the Newer Coal Formation (Quart. Journ.
  

Geol. Soc. 1845, vol. i. p. 322), some spaces in the south of Pictou and Col-
chester counties, occupied by hypogene and old metamorphic rocks, are coloured
as carboniferous. These spaces, being then unexplored, were left uncoloured by
me ; but the colourist extended the carboniferous tint over them.