[Amr] SYNOPSIS OF THE GEOLOGY OF CANADA 197 
In the Eastern townships, on the east side of the Sutton mountain 
anticline, Cambrian rocks also occur, and likewise east of the Missisquoi 
valley in Potton, in Lisgar, at Waterloo, Richmond, Sweetsburg, 
Frelighsburg, Granby, where slates and quartzites referable to this sys- 
tem have been recognized and so classified by Dr. Ells. From the ad- 
joining State of Vermont the “Georgian” or “Georgia” formation has 
been recognized, and it may be the equivalent of the “L’Anse au Loup” 
limestones, and other early Cambrian strata of the St. Lawrence valley. 
The Laurentian Highlands——Overlying the more or less irregular 
floor of Archean rocks, and filling the hollows throughout several areas or 
isolated basins, Cambrian limestones, and quartzites, and dolomites 
associated with certain dioritic traps are found, viz.:—along the Labra- 
dor coast at L’Anse au Loup (L’Anse au Loup limestones or formation), 
at Lake Mistassini (Mistassini formation), along Richmond gulf, and 
Nastapoka group of islands on the east coast of Hudson bay. At 
L’Anse au Loup, white sub-crystalline limestones, carrying abundance of 
fossil remains, described by Billings, form part of the Lower Cambrian 
strata. Dr. Bell recognizes the Manitounuck group and the Nastapoka 
group or formations along the eastern coast of Hudson bay. ‘These 
two Dr. Bell held to be equivalent of the Nipigon formation which, in 
turn, he held, to represent the Keweenawan of Lake Superior. Mr. 
Low, who has examined these more recently, would place these two 
groups below the Keweenawan, and reckons them as equivalents of the 
older Animikie. 
On the Larch river, on the Wiachouchan, on the Koksoak, on the 
Hamilton and Kaniapiskau rivers, Mr. Low records areas of Cambrian, 
which lie almost horizontally, and consist largely of shale resting on 
light yellow compact cherty dolomite, overlaid by bands of brownish 
and greenish argillaceous limestones interbedded with rusty shales asso- 
ciated with a large exposure of bedded iron ore consisting of a mixture 
of magnetite and hematite. 
On the west of Hudson bay Mr. Tyrrell describes the occurrence 
of sandstones and conglomerates (Athabasca formation) which represent 
the basal portion of the Cambrian of Doobaunt lake and other locali- 
ties, including the valley of the Thelew river. These sandstones may 
extend into the regions south and east of Lake Athabasca, where they 
appear as red and mottled sandstones and sandy shales, referred by some 
to the Keweenawan of Lake Superior. In the vicinity of Churchill Mr. 
Tyrrell has recorded a small outlier of Cambrian, forming a narrow 
strip of land between Cape Churchill and the fort of the same name. 
North of Lake Superior and Lake Huron, the Animikie and 
Keweenawan or Nipigon formations are classed as the basal series in the 
