Scientific results, North Atlantic-Artic Gateways 1, covering Leg 151 of the cruises of the Drilling Vessel JOIDES Resolution, St. John's Harbor, Newfoundland, to Reykjavik, Iceland, Sites 907-913, 24 July-24 September 1993 / Jörn Thiede [and others], shipboard scientists ; John V. Firth, shipboard staff scientist ; Ruth N. Riegel, volume editor