84 Revieivs — Geological Survey of Canada. 



Grewiopsis (allied to TiUia), Viburnum, Carpolite (resembling 

 Legunmwsites arachnoides, Lesq.). 



Evidences of glaciation abound tbi'oughout the district. In the 

 Peace River Pass, well-marked groovings occur on the south side of 

 the river, tv\^o miles east of Mount Selwyn. The movement of the 

 ice here was eastward. The glacial deposits consist of Boulder- 

 clay, accompanied by gravels, sands, and silts. 



Gold has been obtained in the Oraenica region, principally from 

 the gravels overlying the older rocks, in the beds of the present 

 streams. No deep diggings or extensive hydraulic workings have 

 so far been attempted in this district. 



Mr. D. B. Dowling presents his report (pp. 1 f to 64 f) on the 

 country in the vicinity of Red Lake and part of the basin of Berens 

 River, Keewatin. This district has an area of 6,300 square miles, 

 the larger part of it forming a basin draining to the south to 

 English River, and thence to Lake Winnipeg. The northern 

 portion drains northward to Berens River, and thence westward to 

 Lake Winnipeg. After detailing the physical features of the 

 country, the writer describes its geological characters. The rocks 

 exposed are all Archaean, consisting of gneisses and associated 

 granites, classed generally as Lanrentian, and folded schists and 

 greenstones of the Huronian, In many respects these rocks are 

 counterparts of those in the districts fui'ther south on the Lake of 

 the Woods and Rainy Lake. Glacial action is shown in this area on 

 the surfaces of the Archaean rocks, which are all more or less 

 rounded and sometimes polished. 



The report made by Dr. R. W. Ells (pp. 1 j to 157 j) treats of 

 a portion of the province of Quebec comprised in the south-west 

 sheet of the "Eastern Townships" map (Montreal sheet), with a 

 chapter on the Laurentian, north of the St. Lawrence River, by 

 Dr. Frank D. Adams. This is classic ground to the Canadian 

 geologist, explorations having been carried on here almost from 

 the beginning of the geological survey of Canada. 



The sequence of the rocks (in descending order) represented in 

 this i-egion is as follows : — 



Superficial deposits. 



Devonian of Memphremagog Lake. 



Silurian of St. Helen's Island, Montreal, Lower Helderberg, and of the St. Lawrence 



Valley, presumably Medina. 

 Cambro- Silurian : Lorraine (Hudson Eiver formation). 

 ,, Utica. 



,, Trenton and Black Eiver. 



,, Cliazy- Trenton, east of the Sutton Mountains axis, Farnham, etc. 



,, Chazy. 



,, Calciferous. 



,, Potsdam sandstone of the Ottawa and St. Lawrence basin. 



Cambrian : Sillery red and green slates, sandstones, and grits. Black and grey 

 slates, east and west of the Sutton Mountain anticline. 

 ,, Georgia series of St. Armand (Lower Potsdam of the "Geology of 



Canada," 1863). 

 ,, Lower Cambrian of the Sutton Mountain anticline. 



Pre-Cambrian : Huronian of the Sutton Mountain anticline. 



,, Laurentian limestone and gneiss, west of the St. Lawrence Eiver. 



Crystalline and igneous rocks, volcanic and plutonic. 



