Creation of the Teton Landscape: The Geologic Story of Grand Teton National Park

View west toward Grand Teton on skyline. Hedrick’s Pond surrounded by “knob and kettle” topography is in foreground, tree-covered Burned Ridge moraine is in middle distance, and extending from it to foot of mountains is gray flat treeless glacial outwash plain. National Park Service photo by W. E. Dilley.
View west up Cascade Canyon, with north face of Mt. Owen in center. National Park Service photo by H. D. Pownall.
To Fritiof M. Fryxell, geologist, teacher, writer, mountaineer, and the first ranger-naturalist in Grand Teton National Park.
All who love and strive to understand the Teton landscape follow in his footsteps.
By J. D. LOVE AND JOHN C. REED, JR. U.S. Geological Survey
Library of Congress Catalogue Card No. : 68-20628 ISBN O-931895-08-1
1st Edition 1968
1st Revised Edition 1971
Reprinted 1979 Reprinted 1984 Reprinted 1989
Grand Teton Natural History Association Moose, Wyoming 83012
Geology is the science of the Earth—the study of the forces, processes, and past life that not only shape our land but influence our daily lives and our Nation’s welfare. This booklet, prepared by two members of the U.S. Geological Survey, discusses how geologic phenomena are responsible for the magnificent scenery of the Teton region.
Recognition of the complex geologic history of our Earth is vital to the enjoyment and appreciation of beautiful landscapes and other natural wonders, to the planning of our cities and highway systems, to the wise use of our water supplies, to the study of earthquake and landslide areas, to the never-ending search for new mineral deposits, and to the conservation and development of our known natural resources. Who can say, in the long run, which of the many uses of this knowledge is the most compelling reason to seek an understanding of the Earth?

J. D. Love
John C. Reed
Содержание

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CONTENTS


THE STORY BEGINS


First questions, brief answers


An extraordinary story


An astronaut’s view


A pilot’s view


A motorist’s view


A mountaineer’s view


CARVING THE RUGGED PEAKS


Steep mountain slopes—the perpetual battleground


Rock disintegration and gravitational movement


Running water cuts and carries


Glaciers scour and transport


Effects on Jackson Hole


MOUNTAIN UPLIFT


Kinds of mountains


Anatomy of faults


Time and rate of uplift


Why are mountains here?


The restless land


ENORMOUS TIME AND DYNAMIC EARTH


Framework of time


Rocks and relative age


Fossils and geologic time


Radioactive clocks


The yardstick of geologic time


PRECAMBRIAN ROCKS—THE CORE OF THE TETONS


Ancient gneisses and schists


Granite and pegmatite


Black dikes


Quartzite


A backward glance


The close of the Precambrian—end of the beginning


THE PALEOZOIC ERA—TIME OF LONG-VANISHED SEAS AND THE DEVELOPMENT OF LIFE


The Paleozoic sequence


Alaska Basin—site of an outstanding rock and fossil record


Advance and retreat of Cambrian seas: an example


Younger Paleozoic formations


THE MESOZOIC—ERA OF TRANSITION


Colorful first Mesozoic strata


Drab Cretaceous strata


Birth of the Rocky Mountains


TERTIARY—TIME OF MAMMALS, MOUNTAINS, LAKES, AND VOLCANOES


Rise and burial of mountains


The First Big Lake


Development of mammals


Volcanoes


QUATERNARY—TIME OF ICE, MORE LAKES, AND CONTINUED CRUSTAL DISTURBANCE


Hoback normal fault


Volcanic activity


Preglacial lakes


The Ice Age


Modern glaciers


THE PRESENT AND THE FUTURE


APPENDIX


Acknowledgements


Selected references—if you wish to read further


About the authors


Index of selected terms and features


The GRAND TETON NATURAL HISTORY ASSOCIATION


Transcriber’s Notes

О книге

Язык

Английский

Год издания

2016-08-18

Темы

Geology -- Wyoming -- Grand Teton National Park

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