U.S. Geological Survey Open-File Report 2009-1031
By D.C. Twichell, E.A. Pendleton, R.Z. Poore, L.E. Osterman, and K.W. Kelso
U.S. Department of the Interior
U.S. Geological Survey
U.S. Geological Survey, Reston, Virginia: 2009
For product and ordering information:
For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
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.