The Geology and Petrography of Crater Lake National Park, 1902

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The Geology and Petrography of Crater Lake National Park, 1902

by Joseph Silas Diller and Horace Bushnell Patton –  The earliest complete study of Crater Lake’s geology.

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 Table of Contents.

Complete Report (PDF) geology-petrography-crater-lake

01 Cover

02 Introduction

03 Routes to Crater Lake

04 Excursions About Crater Lake

05 Part I Limits of the Cascade Range

06 Foundation of the Cascade Range

07 Eocene History of the Cascade Range

08 Miocene History of Cascade Range

09 Union Peak

10 Mount Thielson

11 Mount Mazama

12 General Features

13 Lavas of Mount Mazama

14 Andesites

15 Andesites

16 Castle Creek Andesite Area

17 Munson Point Andesite Area

18 Union Peak Andesite Area

19 Eagle Crags Andesite Area

20 Dutton Cliff Andesite Area

21 Sentinel Rock Andesite Area

22 Round Top Andesite Area

23 Steel Bay Andesite Area

24 Andesite of Wizard Island

25 Andesitic Dikes

26 Lavas of Mount Mazama – Basalts

27 Timber Crater Basalt Flow

28 Desert Cone and Red Cone Basalt Flows

29 Bald Crater Basalt Flow

30 Crater Peak Basalt Flow

31 Other Flows

32 Lavas of Mount Mazama – Dacites

33 Sun Creek Dacite Flow

34 Cloud Cap Dacite Flow

35 Grouse Hill Dacite Flow

36 Llao Rock Dacite Flow

37 Wineglass Dacite Flow

38 Cleetwood Cove Dacite Flow

39 Dacite Dikes

40 Dacite Pumice

41 Glaciation of Mount Mazama

42 Original Condition of Mount Mazama

43 Development of Mount Mazama

44 Destruction of Mount Mazama and Formation of the Caldera

45 Temperature of Crater Lake

46 Changes of Water Level in Crater Lake

47 Evaporation From Crater Lake

48 Inflow of Crater Lake

49 Outlet of Crater Lake

50 Hypersthene – Andesites

51 Mineral Components

52 Plagioclase

53 Pyroxene

54 Hypersthene

55 Augite

56 Accessory Minerals

57 Classification of Andesites

58 Hyalopilitic Types of Andesites

59 Hypocrystaliline Type of Andesite

60 Hypocrystalline Andesite Subtype A

61 Hypocrystalline Andesite Subtype B

62 Holocrystalline Type of Andesite

63 Dacitic Type of Andesite

64 Uncertain Types

65 Andesite Dikes

66 Chemical Analyses of Andesites

67 Secretions in Andesites

68 Hypersthene – Dacites

69 Feldspar

70 Hornblende

71 Hypersthene

72 Augite

73 Other Minerals

74 Llao Rock Flow

75 Vitrophyric Dacite

76 Lithoidal Dacite

77 Spherulitic Dacite

78 Nodular Secretions

79 Grouse Hill Flow

80 Cleatwood Cove Flow

81 Wineglass Flow

82 Cloud Cap Flow

83 Sun Creek Flow

84 Dacite Tuff

85 Dacite Dikes

86 Dacitic Ejectamenta

87 Pumice

88 Dark-colored Secretions

89 Light-colored Granophyric Secretions

90 Secretions with Basalt-like Structure

91 Chemical Analyses of Dacites

92 Basalts

93 Interstitial Basalts

94 Feldspar

95 Augite

96 Hyersthene

97 Olivine

98 Magnetite

99 Hypersthene, Apatite and Pseudobrookite Crystals in Basalt

100 Apatite Crystals

101 Hypersthene Crystals

102 Pseudobrookite Crystals

103 Fluidal-Interstitial Basalts

104 Porphyritic-Interstitial Basalts

105 Andesitic Basalts

106 Andesitic Basalts Type A

107 Andesitic Basalts Type B

108 Andesitic Basalts Type C

109 Andesitic Basalts Type D

110 Chemical Analyses of Basalts

111 Concluding Remarks on Basalts

112 List of Crater Lake rocks

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