Eunice Lake, northwest of Mount Rainier. The lake lies in a small bedrockbasin that was scoured out by a glacier between about 15,000 and 20,000years ago. The rounded green slopes at the far edge of the lake areunderlain by rock that has been smoothed and grooved by glacier ice.This side of Mount Rainier rises to Liberty Cap, which hides the truesummit of the volcano.
The Geologic Story
of Mount Rainier
By
Dwight R. Crandell
A look at the geologic past of one of America’s most scenic volcanoes
GEOLOGICAL SURVEY BULLETIN 1292
UNITED STATES
DEPARTMENT OF THE INTERIOR
WALTER J. HICKEL, Secretary
GEOLOGICAL SURVEY
William T. Pecora, Director
Library of Congress Catalog-Card No. 79-601704
U.S. GOVERNMENT PRINTING OFFICE: 1969
For sale by the Superintendent of Documents, U.S. Government Printing Office
Washington, D.C. 20402—Price 65 cents (paper cover)
contents
- Page
- The changing landscape of 12-60 million years ago 3
- Thumbnail biography of Mount Rainier 11
- Results of recent eruptions 12
- Why glaciers? 23
- Work habits of glaciers 25
- Yesterday’s glaciers 29
- Landslides and mudflows—past, present, and future 35
- The volcano’s future? 42
- Further reading in geology 43
- Frontispiece. Eunice Lake, northwest of Mount Rainier.
- Figure Page
- 1. Outcrop of sandstone and shale in the Puget Group 6
- 2. Outcrop of welded tuff in the Stevens Ridge Formation 8
- 3. Granodiorite looks like granite 9
- 4. Geological cross section of Mount Rainier 10
- 5. An old lava flow which forms Rampart Ridge 13
- 6. Columns of andesite at the end of an old lava flow 13
- 7. Layers of pumice on the floor of a cirque 14
- 8. Generalized distribution of some pumice layers 16
- 9. Breadcrust bomb enclosed in a mudflow deposit 19
- ...