CONTENTS. 



Page, 



LETTER OP TRANSMITTAJL in 



PREFACE v 



TABLE OP CONTENTS xm 



LIST OF ILLUSTRATIONS XXV 



LIST OF ATLAS SHEETS XXVII 



BRIEF OUTLINE OP RESULTS xxix 



PART I. 







GEOLOGY. 

 CHAPTER I. 



LEADVILLE ITS POSITION, DISCOVERY, AND DEVELOPMENT 3 



Topographical description 3 



Routes of approach g 



Discovery of the precious metals 7 



Development of mines f 10 



Growth of the city 14 



Production 15 



CHAPTER II. 



GENERAL GEOLOGY OF THE MOSQUITO RANGE 19 



Rocky Mountains in Colorado 19 



Eastern uplift 20 



The Parks 22 



Western uplift 23 



Mountain structure 24 



Mosquito Range Topography 27 



Geological history 30 



Mineral deposition 33 



Structural results of the dynamic movements 34 



Displacement Volcanic rocks 39 



General erosion Arkansas Valley erosion 40 



Glacial erosion 41 



Stream erosion Valleys 42 



XIII 



