Department of Mineral Resources, Geological Survey Division, Paleontological Section, Rama VI Road, Bangkok 10400, Thailand; Institut des Science de l'Evolution, Université Montpellier-II, Centre National de la Recherche Scientifique, 064, 34095 Montpellier Cedex 5, France; Department of Geology, University of Pathein, Pathein, Myanmar; Geology Department, University of Yangon, Yangon, Myanmar; and Office of Strategic Studies, Ministry of Defense, Yangon, Myanmar (At 2000-04-11)