CLARK: TACONIC REVOLUTION. 139 
ard way of noting a contact, so that his writings are of almost 
negligible value when urged in support of the Taconic Revolu- 
tion. Dawson mentioned the "contrast between the Upper 
Silurian and the Carboniferous" at Arisaig and along the East 
River/ but did not mention the contrast or even the contact 
between the Cambro-Silurian and the Silurian. 
Honeyman, in describing the geology of Lochaber,^ — and I 
know of no better account than this— finds two distinct groups of 
rocks, the lower of which is Silurian in age, and so this region 
can scarcely be used to prove upturning between the Ordovician 
and the Silurian. These Silurian strata are highly altered, ac- 
cording to Honeyman. Dawson gives no additional information. 
Fletcher adds that the area is overlain to the south and north 
by red Devonian slates.^ 
The situation at Kerrowgare is best described in Fletcher's 
own words :^ 
"On Moose River, near the post-office of that name, a Silurian 
trough, possibly of this [Medina] age, lies among the older 
schists. Another belt runs down the East River of Pictou, 
generally on the north side from near its head to Springville. 
. . . On the brooks near Beaver Lake, Kerrowgare and Sunny- 
brae, Medina and Clinton fossiliferous strata are in contact with 
Cambro-Silurian and perhaps older rocks, and are overlain to 
the southward by a wide belt of Devonian gray slates. ... In 
Blanchard Brook, not far above the bridge at Sunnybrae, 
Silurian sandstone, rich in fossils, is underlain by porphyritic 
and other Cambro-Silurian rocks, followed again upstream by 
Medina sandstone." 
Dawson mentions fossiliferous Upper Silurian rocks along the 
East River of Pictou which are much altered, nearly vertical, 
and with NE. or SE. strike.^ He does not describe any under- 
lying rocks. 
No statement of anv contact between the Cambro-Silurian 
»Dawson, J. W. Acadian Geology. Third ed., p. 560, 1878. 
^Honeyman. Rev. David. Trans. Nova Scotian Inst. Sci, vol. 4. p. 
440, 187S. 
^Fletclier, Hugh. Ann. Rept. Geol. Surv. Canada 1886, vol. 2, p. 42P, 
1887. 
*Ibtd., p. 43P. 
'^Daw.son, J. W. Acadian Geology. Third ed., p. 568, 1878. 
