U.S. Geological Survey

<body> <img src="../images/black.jpg" WIDTH="80" HEIGHT="22" alt="USGS"> <h2>U.S. Geological Survey Bulletin 2004</h2> <hr> <h3>Our page uses HTML frames, which your browser does not support. </h3> <p> Please use our <a href="bull2004table_of_contents.htm">text version.</a> <p> </h3> <address>For additional information send e-mail to the author of this Open-File Report<br> at <a href="mailto:jduval@usgs.gov">jduval@usgs.gov</a>. </address> <p> <hr> <em>This page last updated 10/23/2002</em> </body>