viii

CONTENTS—Concluded

Illustrations

Pacs
Map 10380A. Aiken Lake, British Columbia....................00ccceeeceeeee In pocket
Plate I. View looking west from outlet of Aiken Lake.................. Frontispiece
TT VAS Osilinka:River Walley cots ores ee ee ce a eee 231
B. View of Omineca Mountains............0.....0cceeee cece cess 231
PETS SAnt Naiewor: Wired esRange sackson vase each eis 232
B. Kame terraces, Mesilinka River Valley......................04. 232
IV. A. Three levels of cirques, Kliyul Creek Valley..................... 233
B. Dying glaciers, Osilinka River Valley.....................2.008. 233
V. A. Furrows in boulder clay, Ingenika River Valley.................. 234
B. Felsenmeer slope, Lay Range..............0.0cccececececeseces 234
VI. A Rock glacier on east side of Hornway Creek Valley............... 235
B. Tenakihi group gneissic quartzite and quartz-mica-feldspar gneiss.. 235
VII. A. Banded Ingenika group limestone, east of Mount Lay..... SR IE 236
B. Photomicrograph of quartzite from Ingenika group, Russel Range.. 236
VIII. A. Fault contact between contorted argillite and sheared tuff, Tutizika ony

UV Clits seyate etevereneter eve osetore teres nuatete teaches enemene tie te Tete CoPeea Te tates a ote cis
B. Fibrous chrysotile serpentine in peridotite..................... en 2a
IX. A. Banded dyke in ‘starred’ appinite, Abraham Creek............... 238
B. Inclusions of hornblendite in hornblende diorite, Abraham Creek.. 238
X. A. Pegmatite and diorite dykes in diorite, Abraham Creek........... 239
B. Typical outcrop of Uslika formation, Conglomerate Mountain.... 239
Figure 1. Profile of surface of rock glacier...............0.cecceceesceuccucee 26
2. Distribution of fragment sizes in talus and rock glacier.............. 28
3. Structure of Tenakihi group rocks, south of Jim May Creek.......... 42
4. Enlarged section showing structure of Tenakihi group rocks.......... 43
5. Sketch of roof of granodiorite stock east of Blackpine Lake........... 97
6. Festoons of chromite-rich layers in serpentinized peridotite........... 127
7. Pattern of chromite-rich bands in peridotite........................ 128
8. Section along ridge in Lay Range, showing top of ultramafic body.... 147
9. Diagram of Hogem batholith, showing location of specimens......... 175
10. Modes of specimens from Hogem batholith......................... 176
11. Diagram illustrating attitudes of joints in Hogem batholith.......... 182
12, Diagram showing relation between diorite and pegmatite............ 186
13. Geological plan and section, Ferguson group..................... In pocket
14. nderground workings, Croydon group...............seccseeee-... 214
15. Plan of surface geology, Granite Basin group....................... 217
16. Underground workings, main adit, Jupiter GROUP ee. ciysc siege eee teers 220
17. Plan of No. 5 open-cut, Ruby group..........................., In pocket
18. Sketch of surface geology, Beveley BIOUD sale reati eens In pocket