The Geology of Crater Lake National Park, Oregon by Howell Williams 1942

The Geology of Crater Lake National Park, Oregon
With a reconnaissance of the Cascade Range southward to Mount Shasta by Howell Williams, 1942

cover

Sample pages from the original book. Click to enlargecontents1 contents2 contents3 contents4

  1. 01 Abstract
  2. 02 Introduction
  3. 03 Introduction – Suggested Excursions
  4. 04 Introduction – Acknowledgments
  5. 05 Discovery and Early Exploration
  6. 06 The Foundations of Mount Mazama – The Pre-Cretaceous Bedrocks
  7. 07 The Foundations of Mount Mazama – Eocene Formations
  8. 08 The Western Cascade Volcanic Series
  9. 09 The Western Cascade Volcanic Series – Age of the Western Cascade Series
  10. 10 The Western Cascade Volcanic Series- Rocks of the Western Cascade Series
  11. 11 The Western Cascade Volcanic Series – Climate and Flora
  12. 12 Intrusions and Volcanic Necks in the Western Cascades
  13. 13 Earth Movements of the Close of the Miocene
  14. 14 The High Cascades Between Mounts Shasta and Mazama
  15. 15 The High Cascades Between Mounts Shasta and Mazama – The Volcanic Cones
  16. 16 The lntracanyon and Associated Fissure Flows
  17. 17 The Union Peak Volcano
  18. 18 The Union Peak Volcano – Limits of the Volcano
  19. 19 The Union Peak Volcano – The Main Shield
  20. 20 The Union Peak Volcano – Parasitic Cinder Cones
  21. 21 The Union Peak Volcano – The Summit Cone
  22. 22 The Union Peak Volcano – The Summit Plug
  23. 23 Other Pre-Mazama Lava Within the Park
  24. 24 The Structural Setting of Mount Mazama
  25. 25 Nature of the Floor and Size of the Cone
  26. 26 Building of the Main Andesite Cone
  27. 27 Nature of the Lavas
  28. 28 Interbedded Andesitic Pyroclastic Rocks
  29. 29 The Main Andesite Cone of Mount Mazama – Solfataric Areas and Vents
  30. 30 The Main Andesite Cone of Mount Mazama – Dikes
  31. 31 Dacite Dikes
  32. 32 Andesite Dikes
  33. 33 ?Mount Scott
  34. 37 Inter-andesitic Dacite Pumice on the Caldera Wall
  35. 34 The Earlier Dacite Eruptions
  36. 38 The Northern Arc of Vents
  37. 35 The Southern Dacite Flows and Domes
  38. 39 The Watchman Dike and Flow
  39. 36 The Eastern Cluster of Domes and Flows
  40. 40 The Hillman Cone
  41. 41 The Sentinel Rock Flow and Vent
  42. 42 The Dacite Flow of Llao Rock
  43. 43 The Grouse Hill Dome and Flow
  44. 44 The Cleetwood Flow
  45. 45 Dacites of Redcloud and Cloudcap
  46. 46 The Parasitic Scoria Cones of Mount Mazama
  47. 47 The Older Cones
  48. 48 The Younger Cones
  49. 49 The Younger Cones – Bald Crater
  50. 50 The Younger Cones – Desert Cone
  51. 51 The Younger Cones – Red Cone
  52. 52 The Younger Cones – Forgotten Crater
  53. 53 The Younger Cones – Crater Peak
  54. 54 The Younger Cones – Diller Cone
  55. 55 The Younger Cones – Southeast Comer Cone
  56. 56 The Younger Cones – Cavern Creek Cone
  57. 57 The Younger Cones – The Pumice Flat Cones
  58. 58 The Younger Cones – Cones outside the Park
  59. 59 Timber Crater
  60. 60 The Wineglass Welded Tuff and Associated Pumice
  61. 61 The Formation of Mount Mazama Just before Its Destruction
  62. 62 The Climax: Culminating Explosions of Pumice and Scoria
  63. 63 The Main Pumice Fall – Distribution and Thickness
  64. 64 The Main Pumice Fall – Lithology of the Main Pumice Fall
  65. 65 The Main Pumice Fall – Volume of the Pumice Fall and Its Magma Equivalent
  66. 66 The Climax: Relation of the Pumice Fall to the Pumice Flows
  67. 67 The Glowing Avalanches: Pumice and Scoria Flows
  68. 68 The Glowing Avalanches: Pumice and Scoria Flows – Distribution
  69. 69 The Glowing Avalanches: Pumice and Scoria Flows – The Lack of Sorting
  70. 70 The Glowing Avalanches: Pumice and Scoria Flows – The Paucity of Stratification
  71. 71 The Glowing Avalanches: Pumice and Scoria Flows – Abundance of Charred Logs
  72. 72 The Glowing Avalanches: Pumice and Scoria Flows – Double Character of the Deposits
  73. 73 The Glowing Avalanches: Pumice and Scoria Flows – Content of Lithic Fragments
  74. 74 The Glowing Avalanches: Pumice and Scoria Flows – Erosive Action of the Flows
  75. 75 The Glowing Avalanches: Pumice and Scoria Flows – “Fossil Fumaroles”
  76. 76 The Annie Creek Flows
  77. 77 The Sun Creek Flows
  78. 78 The Sand Creek Flows
  79. 79 The Rogue River Flows
  80. 80 The Castle Creek Flows
  81. 81 Other Flows down the West Slope of Mazama
  82. 82 Flows down the North Slope
  83. 83 Flows down the East Slope
  84. 84 Volume of the Pumice-Scoria Flows
  85. 85 The Last Weak Explosions
  86. 86 Total Volume of Material Erupted During the Culminating Activity of Mount Mazama
  87. 87 The Origin of the Caldera
  88. 88 How Much of Mount Mazama has Disappeared?
  89. 89 Diller’s Collapse Theory
  90. 90 Smith and Swartzlow’s Explosion Theory
  91. 91 The Origin of the Caldera – A Preferred Theory
  92. 92 Comparison of Crater Lake with Other Caldera
  93. 93 The Caldera Floor
  94. 94 The Age of Crater Lake
  95. 95 The Relation of Ancient Man to Crater Lake
  96. 96 Post-caldera Eruptions
  97. 97 Post-caldera Eruptions – Wizard Island
  98. 98 The Glaciation of Mount Mazama
  99. 99 Evidences of Early Glaciation on the Caldera Walls
  100. 100 Evidences of Early Glaciation on the Caldera Walls – Cloudcap Bay
  101. 101 The Northeast Wall, from Grotto Cove to Cleetwood Cove
  102. 102 Cleetwood Cove to Pumice Point
  103. 103 Evidences of Early Glaciation on the Caldera Walls – Steel Bay
  104. 104 Evidences of Early Glaciation on the Caldera Walls – Llao Rock
  105. 105 West Wall of the Caldera, from Llao Rock to Eagle Cove
  106. 106 South Wall of the Caldera, from Eagle Cove to Kerr Notch
  107. 107 Danger Bay and Sentinel Rock
  108. 108 Direction of Glacial Striae on the Caldera Walls
  109. 109 Summary of Glacial Evidences on the Caldera Walls
  110. 110 Evidence of Glaciation Outside the Caldera
  111. 111 The Munson Valley or Annie Creek Glacier
  112. 112 The Sun Creek Glacier
  113. 113 The Kerr Valley Glacier
  114. 114 Glaciers of Mount Scott
  115. 115 The Bear Creek Glacier
  116. 116 Glaciers on the North Slope of Mazama
  117. 117 Glaciers on the West Slope of Mazama
  118. 118 The Castle Creek Glacier
  119. 119 The Rogue River Glacier
  120. 120 The Union Peak Glaciers
  121. 12 Changes of Water Level in Crater Lake
  122. 122 Microscopic Petrography – Lavas of the Union Peak Volcano
  123. 123 Microscopic Petrography – Lavas of the Union Peak Volcano – Lavas of the Main Cone
  124. 124 Microscopic Petrography – Lavas of the Union Peak Volcano – Intrusions near Bald Top
  125. 125 Microscopic Petrography – Lavas of the Union Peak Volcano – The Micronorite Plug of the Union Peak Volcano
  126. 126 Microscopic Petrography – Pre-Mazama Lavas in the Northwest Corner of the Park
  127. 127 Microscopic Petrography – Andesites of Mount Mazama and Scott
  128. 128 Andesites of Mount Mazama and Scott – Basic Inclusions in the Andesites
  129. 129 Andesites of Mount Mazama and Scott – Andesites of the Hillman Vent
  130. 130 Andesites of Mount Mazama and Scott – Andesites of the Phantom Vent and Cone
  131. 131 Andesites of Mount Mazama and Scott – Alterations of the Mazama Andesites
  132. 132 Microscopic Petrography – The Southern Dacite Flows and Domes
  133. 133 Microscopic Petrography – The Younger Dacite Flows
  134. 134 Microscopic Petrography – The Younger Dacite Flows – The Llao Dacite
  135. 135 Microscopic Petrography – The Younger Dacite Flows – The Grouse Hill Dacite
  136. 136 Microscopic Petrography – The Younger Dacite Flows – The Cleetwood Dacite
  137. 137 Microscopic Petrography – The Younger Dacite Flows – The Redcloud Dacite
  138. 138 Microscopic Petrography – The Younger Dacite Flows – Dacites of Cloudcap and Scott Bluffs
  139. 139 Microscopic Petrography – The Younger Dacite Flows – Dacites of Anderson Bluffs
  140. 140 Microscopic Petrography – Domes and Flows East of Mount Scott
  141. 141 Microscopic Petrography – Welded Dacite Tuffs (Ignimbrites)
  142. 142 Microscopic Petrography – Timber Crater Lavas
  143. 143 Microscopic Petrography – Cinder Cones and Associated Flows
  144. 144 Microscopic Petrography – Cinder Cones and Associated Flows – Crater Peak
  145. 145 Microscopic Petrography – Cinder Cones and Associated Flows – Diller Cone
  146. 146 Microscopic Petrography – Cinder Cones and Associated Flows – Cones Bordering Pumice Flat
  147. 147 Microscopic Petrography – Cinder Cones and Associated Flows – Desert Cone and Bald Crater
  148. 148 Microscopic Petrography – Cinder Cones and Associated Flows – Red Cone
  149. 149 Microscopic Petrography – Cinder Cones and Associated Flows – Forgotten Crater
  150. 150 Microscopic Petrography – Cinder Cones and Associated Flows – Wizard Island
  151. 151 Microscopic Petrography – Dacite Dikes
  152. 152 Microscopic Petrography – Andesite Dikes
  153. 153 Microscopic Petrography – Pumice and Scoria of the Climactic Eruptions – Dacite Pumice
  154. 154 Microscopic Petrography – Pumice and Scoria of the Climactic Eruptions – Basic Scoria
  155. 155 Analyses
  156. 156 Petrology

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