Special AnnouncementWe are pleased to announce the appointment of Dr Anthony Tankard to the position of North American Regional Editor. Dr Tankard, who took up his appointment in September 1996, can be reached at Tankard Enterprises Ltd. 71 Lake Crimson Close SE, Calgary, Alberta, T2J 3K8, Canada. Tel: 403 278 1723. Fax: 403 271 1872. E-mail: tankard@cadvision.comMarine and Petroleum Geology is the pre-eminent international forum for the exchange of multidisciplinary concepts, interpretations and techniques for all concerned with marine and petroleum geology in industry, government and academia. Rapid bimonthly publication allows early communications of papers or short communications to the geoscience community.Marine and Petroleum Geology is essential reading for geologists, geophysicists and explorationists in industry, government and academia working in the following areas: marine geology; basin analysis and evaluation; organic geochemistry; reserve/resource estimation; seismic stratigraphy; thermal models of basic evolution; sedimentary geology; continental margins; geophysical interpretation; structural geology/tectonics; formation evaluation techniques; well logging.An index bound in last issue of calendar year.