38 L. W. BAILEY ON THE SILURIAN 
belt of dark green siliceous slate," described by Packard under the name of hornstone, and 
containing massive beds of bright red cherty slate, with a nearly vertical dip, we appear 
again to have a repetition of the relations found on the Beccaguimic, these cherty slates 
being, as we believe, the equivalents of the flinty slates of Shaw’s Mills and, like the 
latter, of Cambro-Silurian age. The following tabular view will serve to make this 
parallelism more evident :— 
1.—Brocacumic SECTION. 
A, Cambro-Silurian. 
Black calcareo-siliceous slates, with brachiopods and trilobites. 
B. Silurian. 
1. Grey calcareous conglomerates and grits, holding fragments of black siliceous slates 
and quartzite, jasper, etc., mingled with remains of crinoids. 
. Grey, reddish and brown sandstones and slates, associated with beds of fossiliferous 
bo 
limestone. 
3. Grey conglomerates. 
4. Grey, calcareous and buff-weathering sandstones, with stems of crinoids and shells. 
5. Grey and dark grey slates, with graptolites and remains of plants. 
6. Grey, bluish-weathering and calcareous slates. 
2.—Fisu RIVER SEOTION. 
A. Cambro-Silurian ? 
Dark cherty slates, with bands of jasper. 
B. Silurian. 
1. Grey calcareous conglomerates ? not observed. 
2. Grey, reddish and brown sandstones and shales, associated with beds and containing 
enclosed masses of fossiliferous limestone. 
. Grey, calcareous conglomerate, with pebbles of dark flinty slate, jasper, ete. 
. Grey, calcareous and buff-weathering sandstones, with crinoids and shells. 
Grey and dark grey slates, with remains of plants. 
. Grey, bluish-weathering, calcareous slates. 
D Tp co 
I pass now, thirdly, to the Temiscouata region. Between the latter and the region of 
the Beccaguimic in Carleton county, the St. John River affords an admirable section of the 
Silurian system, without, however, exposing any beds which can with certainty be 
regarded as representing its base. For nearly the whole distance of one hundred and fifty 
miles, including the Madawaska River and the southern half of Lake Temiscouata, the only 
rocks seen are slates with occasional alternating beds of fine sandstone, mostly of grey or 
dark grey colours, but occasionally red or green, the beds of this latter colour being usually 
associated with beds of impure hematite. They are yery generally calcareous, and at times 
highly so, but no actual beds of limestone occur. They are also at many points fossiliferous, 
the fossils including species similar to those of the Beccaguimic, and, like the latter, 
appearing to indicate an Upper Helderberg horizon. Finally, they have been subject to 
extensive disturbance, the plications being general and of the most complicated character. 
The first beds of a markedly different aspect from the above are met with upon the 


1These beds bear some resemblance to the beds of Pointe aux Trembles or Temiscouata Lake, to be presently 
described, and their true position, in both instances, is somewhat uncertain. 
