Corridors of time
Subtitle: 1,700,000,000 years of Earth at Grand Canyon
By: panoramic photography and text by Ron Redfern ; illustrations by Gary Hincks ; introduction by Carl Sagan.
Publisher: Times Books
Published: 1980
Place of publication: New York
Number of pages: 198
Subjects: Geology -- Arizona -- Grand Canyon National Park.; Geology -- Colorado Plateau.; Grand Canyon National Park (Ariz.)
Notes: Includes bibliographical references (p. 194-195) and index.

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