Disclaimer:
Despite my employment there, this web site is not an official product of the University of Texas Bureau of Economic Geology. The Director of the Bureau has not approved its publication. The Bureau graphics and editing staff are not responsible for any of the work appearing here. Bureau resources were used for initial acquisition of some images, but production of web pages and web-ready images did not involve use of Bureau resources. Time I spent on this page was outside of my normal Bureau employment. I have, however, attempted at all times to produce web pages that reflect the high standards for scientific and technical merit required of B.E.G. publications.