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The USGS celebrates its 125th Anniversary in 2004.

Copyright Issues
Geology of National Parks:
3-D Tours Featuring Park Geology

All the images on this website belong in the "Public Domain" - no one can claim copyright to any images or data contained on this website. They are free to be used, enjoyed, and reproduced for any purpose. However, we request that publishers and webmasters who use these images include: "Source: U.S. Geological Survey" with the image. Historic photographs are reproduced from photography from the Powell Expedition (1870's) and from early stereographic imagery from Yellowstone (1890's) for which the statutes of copyright have long since expired. Aerial views are early USGS aerial photography. All modern photographs on the web pages were modified from original digital photography taken by Philip Stoffer (1995 to present).

Delicate Arch, Arches National Park Canyon de Chelly (Powell Survey, 1875) A Joshua tree, Mojave National Preserve Economic Geyser, Yellowstone National Park Dead Horse Point, Utah Deer Creek Falls, Grand Canyon National Park

This website was prepared by Phil Stoffer
USGS Western Earth Surface Processes Team, Menlo Park, California.

U.S. Department of the Interior - U.S. Geological Survey - Geology Discipline
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Last modified 7/30/2005

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