CONTENTS. 
PAGE 
Introduction . 1 
Field work and location. . . 1 
Methods of study and conclusions , 2 
Arrangement 3 
Geological formations and structures 4 
The Canadian Cordillera S 
The Interior plateaus 6 
General features. < 6 
The uplands 8 
The valleys 13 
Topographic forms due to glaciers 15 
Description of the Be aver dell Map- area 16 
Summary 16 
Detailed description 18 
The uplands.. 18 
The valleys 26 
Lakes and swamps 31 
Glacial forms 33 
Genesis of the plateau topography 33 
The geographic cycle 33 
Physiographic development 36 
The period preceding the eruption of Tertiary lavas 37 
The period ending at the great uplift 38 
The period following the great uplift 43 
Summary 48 
ILLUSTRATIONS. 
Map 36A. Topographical map of the Beaverdell area.. (in pocket) 
page 
Plate I. The U-shaped valley of Otter river, Tulameen map-area 
Frontispiece 
u II. View looking north over the upland and the trough of the 
Otter river, Tulameen map-area . . . . . . . 53 
III. View looking west across King Solomon mountain, Beav- 
erdell map-area 55 
“ IV. View looking south toward Goat peak, Beaverdell map- 
area 57 
“ V. View looking northeast across the valley of the Tula- 
meen river, Tulameen map-area. 59 
Figure 1. Index map showing position of map-area 2 
“ 2. Seven profiles to show the character of the upland surface* 
in the Beaverdell, Tulameen, and Kamloops map-areas 
(at end) 
3. Profile of the West Fork valley floor north of China creek . . 32 
