CLASSIFIED    KEY    TO    THE    INDEX.  385 
Devonian — Continued.  Page. 
.  Greenland 441 
Mississippi  Valley  region 442 
New  England  and  New  York 442 
Ohio  Valley  region 442 
Pacific  coast  region 443 
Rocky  Mountain  region 443 
Southwestern  region 443 
General 443 
District  of  Columbia 443 
Dynamic  and  structural  geology  (geographic  divisions) 443 
Alaska - 443 
Appalachian  region 443 
Atlantic  coast  region 443 
Canada 443 
Central  America 444 
Great  Basin  region 444 
Great  Lakes  region 444 
Great  Plains,  region -. 444 
Greenland 445 
Gulf  region 445 
Hawaiian  Islands 445 
Mexico 445 
Mississippi  Valley  region 445 
New  England  and  New  York 445 
Ohio  Valley  region 446 
Pacific  coast  region 446 
Panama 446 
Philippine  Islands 446 
Rocky  Mountain  region 446 
Southwestern  region 446 
West  Indies 447 
Dynamic  geology  (divisions  by  subject-matter) 448 
Caves  448 
Concretions 448 
Deformation 448 
Earthquakes 448 
Erosion 449 
Faulting 450 
Folding 451 
Glaciers 451 
Intrusion 452 
Jointing 452 
Landslides .... 452 
Magmatic  differentiation 452 
Metamorphism 452 
Ore  formation 452 
Orogeny : 453 
Oscillation 453 
Sedimentation 453 
Underground  temperature 454 
Volcanoes 454 
Weathering 456 
General 456 
Bull.  301—06 25 
