veeks.] CLASSIFIED KEY TO THE INDEX. 137 
Page. 
Dynamic and structural geology (geographic divisions) — Continued. 
Mexico 1 52 
Mississippi Valley region 152 
New England and New York 152 
Pacific coast region 152 
Philippine Islands 152 
Rocky Mountain region 152 
Southwestern region 152 
West Indies 152 
)ynamic and structural geology (divisions by subject-matter) 153 
Caves 153 
Earthquakes 153 
Erosion 153 
Faulting 153 
Folding 153 
Glaciers 153 
Intrusion 153 
Jointing 1 53 
Landsl ides 153 
Magmatic differentiation 1 53 
Metamorphism 154 
Ore formation 1 54 
Oscillation 154 
Sedimentation 154 
Volcanoes 154 
Weathering 154 
General 154 
cononiic geology 155 
Alabama 155 
Alaska 155 
Arizona 155 
Arkansas : 155 
California 155 
Canada 155 
Colorado 156 
Connecticut 156 
Florida '. 1 56 
Georgia 156 
Idaho 156 
Illinois 156 
Indiana 156 
Indian Territory 156 
Iowa „ 156 
Kansas 156 
Kentucky 1 56 
Louisiana 156 
Maine 156 
Massachusetts 156 
Mexico 156 
Michigan 156 
Minnesota 157 
Mississippi „ '57 
Missouri 157 
