i CONTENTS. 
Geologic sketch— Continued. 
Igneous rocks _. 
Granite 
Diorite 
Gabbro 
Diabase and basalt— 
Summary 
Fossils — 
Gold placers _ - 
Fortymile region.-- 
Fortymile area _. 
Wade Creek_- 
Walker Fork and neighboring localities _. 
Tributaries of Canyon Creek- 
Franklin Creek — 
Chicken Creek— 
North Fork of Fortymile— 
Other localities 
Eagle area- 
American Creek _. 
Discovery Fork— 
Seventymile area— 
Broken Neck Creek— 
The falls 
Sonickson Creek- 
Barney Creek- _ 
Nugget Creek- _ 
. Flume Creek 
Benches 
Summary 
Birch Creek region- 
General statement-. 
Creeks 
Deadwood Creek- 
Mammoth Creek- _ 
Mastodon Creek _ 
Independence Creek- 
Miller Creek- 
Eagle Creek and tributaries- 
Summary 
Fairbanks region— 
General statement- 
Geographic sketch- 
Pedro Creek- _ 
Cleary Creek 
Fairbanks Creek- 
Geologic sketch- 
Economic development _ 
Pedro Creek 
Cleary Creek 
Fairbanks Creek 
Summary 
Index 
