This dataset has been approved for release and publication by
the USGS. Although it has been subjected to rigorous review and is
substantially complete, the USGS reserves the right to revise the data
pursuant to further analysis and review. Furthermore, it is released on
condition that 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.
Any use of trade, product, or firm names is for descriptive
purposes only and does not imply endorsement by the U.S. Government.