CONTENTS. 5 
NONMETALLIFEROUS MINERAL RESOURCES OF SOUTHEASTERN AlASK \ Cont'd. Page 
Ornamental and building stones 73 
General statement 73 
Marble 74 
Distribution 74 
Necessary qualities 74 
Competitive districts 7 ! 
Description of localities 75 
Prince of Wales Island 75 
Ham Island 77 
Admiralty Island 77 
Other localities 77 
Granite 77 
Distribution 77 
Characteristics 77 
Market 78 
Gypsum 79 
Occurrence 79 
Developments 79 
Market 80 
Cement 80 
Coal 80 
Reconnaissance on the Pacific coast from Yakitat to Alsek River, by 
Eliot Blackwelder 82 
Geography 82 
Geology 82 
General statement 82 
Formations 83 
M etamorphie complex 83 
Schistose sedimentaries 83 
Yakutat series * 83 
Glacial deposits 84 
Recent alluvium 85 
Structure 85 
Physiography ■ 8G 
Prospecting 86 
Possible routes to the Alsek Valley 87 
Petroleum at Controller Bay. by G. C.Martin 89 
Introduction 89 
Location 89 
Outline of the geology 89 
Developments 91 
Occurrence of petroleum 92 
Seepages 92 
Geographic distribution 92 
Relations to kinds of rock 92 
Relation to the structure 93 
Description of the seepages 93 
Position and description of wells 96 
Principles governing the occurrence of petroleum 97 
( hitlook for profitable exploitation 99 
Problem of locating pools 99 
