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Geological Survey Professional Paper 631
Analysis of a 24-Year Photographic Record of Nisqually Glacier, Mount Rainier National Park, Washington |
THE PETROGRAPHY OF CRATER LAKE NATIONAL PARK
By HORACE BUSHNELL PATTON.
CONTENTS OF PART II.
Mineral components
Plagioclase
Pyroxene
Hypersthene
Augite
Accessory minerals
Classification of andesites
Hyalopilitic type
Hypocrystalline type
Subtype A
Subtype B
Holocrystalline type
Dacitic type
Uncertain types
Andesite dikes
Chemical analyses
Secretions in andesites
Mineral components
Feldspar
Hornblende
Hypersthene
Augite
Other minerals
Distribution and description of dacite masses
Llao Rock flow
Vitrophyric dacite
Lithoidal dacite
Spherulitic dacite
Nodular secretions
Grouse Hill flow
Cleetwood Cove flow
Wineglass flow
Cloud Cap flow
Sun Creek flow
Dacite tuff
Dacite dikes
Dacitic ejectamenta
Pumice
Dark-colored secretions
Light-colored granophyric secretions
Secretions with basalt-like structure
Chemical analyses
Interstitial basalts
Mineral components
Feldspar
Augite
Hypersthene
Olivine
Magnetite
Hypersthene, apatite, and pseudobrookite crystals
Apatite
Hypersthene
Pseudobrookite
Fluidal-interstitial
Porphyritic-interstitial basalts
Andesitic basalts
Type A
Type B
Type C
Type D
Chemical analyses
Concluding remarks on the basalts
Table of thin sections, with new and old numbers
ILLUSTRATIONS IN PART II.
| PLATE XIV. | Crystals in andesite dacite and basalt |
| XV. | Thin sections of andesite |
| XVI. | Thin sections of minerals in andesite |
| XVII. | Thin sections of secretions in dacite |
| XVIII. | Thin sections of secretions in dacite |
| XIX. | Thin section of basalt and of secretions in dacite |
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Last Updated: 01-Mar-2006