VI CONTENTS. 
Copper and other mineral resources of Prince William Sound — Continued. Page. 
Mineral resources — Continued. 
Copper deposits — Continued. 
Copper prospects — Continued. 
Orca 84 
Glacier Island 84 
Knight Island 84 
Latouche Island 85 
Gold and silver 86 
Nickel i 
Lead and zinc 
Conclusions 87 
Preliminary statement on the Matanuska coal field, by G. C. Martin 8£ 
Introduction 88- 
Out line of 1 he geology 
Coarse crystalline rocks 89 
Mesozoic rocks 
Tertiary rocks 
Gravels 
Dike rocks 90 
Struct urc 90» 
Coal 90 
Areal distribution 90 
Position and sections of the coal 90"! 
Anthracite 90 
Bituminous 92 
Eastern field 92 
Western field 9t 
Character of the coal 97 
Chemical and calorimetric tests 97 
Coking qualities 97 
Mining conditions IOC 
Transportation and markets IOC 
The Herendeen Bay coal field, by Sidney Paige 101 
Introduction 100 
Geology 102 
Kenai 103 
Upper Cretaceous 103 
Lower Cretaceous 103 
Upper Jurassic 104 
Igneous rocks 104 
Structure 104 
Description of t he coal 106 
Summary 108 
Yukon placer fields, by L. M. Prindle 10C 
Introduction 106 
Fairbanks region 1 10 
Introduction 1 10 ' 
Geology 1 13 
Bed rock 113 
Alluvial deposits 114 
Formation of placers 1 1 C: 
Source of the gold 1 17 
