Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 33. Papers included in this volume represent final results of part of the research conducted under the auspices of the Dry Valley Drilling Project (DVDP), a coordinated effort by science groups from Japan, New Zealand, and the United States. Primary support for the project came from the U.S. National Science Foundation, Division of Polar Programs; the New Zealand Department of Scientific and Industrial Research, Antarctic Division; and the Japan National Institute of Polar Research. Responsibility for project operations included Japanese support of the Thiel Earth Science Laboratory at McMurdo, New Zealand"s provision of drilling and other technical personnel at the drill sites, and the U.S. purchase of the drill rig and primary logistics such as helicopter airlift support and base shops at McMurdo, all staffed by U.S. Navy personnel and supported by the National Science Foundation. Project coordinators were D. Kear, L. McGinnis, T. Nagata, R. Thomson, T. Torii, and M. Turner. Project advisors were E. Barghoorn, P. Barrett, C. Bentley, R. Black, P. Damon, S. Goldich, H. Kurasawa, M. Murayama, N. Nakai, R. Roy, S. Treves, P. Webb, H. Wright, and Y. Yoshida. Some preliminary papers, as well as papers covering aspects of DVDP not in this volume, have already been published in scientific periodicals and in other volumes, such as the SCAR Symposium Transactions, University of Wisconsin Press, Madison, and the proceedings volume of DVDP Seminar III held in Tokyo. Final reports of the efforts of U.S. scientists are included here, although final heat flow analyses and a synthesis of the geology of the dry valleys were not completed on time to appear on these pages.