U.S. Geological Survey Data Series 469
By Page C. Valentine, Leslie B. Gallea, Dann S. Blackwood, and Erin R. Twomey
U.S. Department of the Interior U.S. Geological Survey U.S. Geological Survey, Reston, Virginia: 2010 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: Suggested citation:
The datasets contained in this report have been approved for release and publication by the Director of the USGS. Although these datasets have been subjected to rigorous review and are substantially complete, the USGS reserved the right to revise the data pursuant to further analysis and review. Furthermore, they are released on condition that neither the USGS nor the United States Government many be held liable for any damages resulting from their authorized or unauthorized use. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report. |