10  CONTENTS. 
Chapter  XIII.  The  Cordilleras — Continued.  Page. 
Section  7.  Wyoming — Continued. 
Summary  of  literature — Continued. 
Bighorn    Mountains 839 
Rattlesnake    (Bridger)    Mountains S40 
Sweetwater  and  adjacent  mountains 840 
Wind    River    Mountains 841 
Gros  Ventre  and  Wyoming  ranges :__  S42 
Teton,   Absaroka,    Snowy,  and  Gallatin   ranges  surrounding 
Yellowstone   Park 843 
Wyoming,  general 844 
Summary   of  present   knowledge 847 
Section    8.  Idaho 849 
Summary  of  literature 849 
Summary   of  present   knowledge 852 
Section    9.  Montana 853 
Summary  of  literature 853 
Summary   of  present   knowledge 863 
Section  10.  Washington,  Oregon,  and  California 865 
Summary    of    literature 865 
Washington 865 
Oregon 867 
California,  with  adjacent  parts  of  Nevada  and  Arizona 867 
Section  11.  British  Columbia  and  Yukon 875 
Summary  of  literature 875 
Summary  of  present   knowledge 881 
Section   12.  Alaska 1 882 
Summary  of  present  knowledge 882 
Introduction 882 
Archean 883 
Metamorphic  sediments  of  undetermined  age 885 
Metamorphosed  Paleozoic  and  post-Paleozoic  rocks 8S9 
Summary 890 
Notes 891 
Index 901 
ILLUSTRATIONS. 
Page. 
Plate    I.  General    map    showing    pre-Cambrian    geology    of    North 
America In  pocket. 
II.  Map  showing  pre-Cambrian  geology  of  the  Lake  Superior 
region 330 
