This image is a work of a United States Geological Survey employee, taken or made during the course of the person's official duties. As a work of the United States Government, the image is in the public domain. For more information, see the USGS copyright policy.
Original uploader was <a href="https://en.wikipedia.org/wiki/User:Carptracker" class="extiw" title="en:User:Carptracker">Carptracker</a> at <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>
11 April 2007 (original upload date)
Transferred from <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>