Keywords: Worldwide distribution of gas hydrates 1996.jpg Gas hydrates 1996 svg Worldwide distribution of confirmed or inferred offshore gas hydrate-bearing sediments USGS Open-File Report 96-272 http //pubs usgs gov/of/1996/of96-272/fig2 html Image is on a en US Geological Survey web site Report produced by USGS and Naval Research Laboratory so USGov is source rather than only USGS PD-USGov original upload log page en wikipedia Gas_hydrates_1996 jpg 2005-02-08 08 27 SEWilco 650×342×8 129112 bytes <nowiki>Worldwide distribution of confirmed or inferred offshore gas hydrate-bearing sediments USGS Open-File Report 96-272 PD-USGov </nowiki> 2005-02-08 08 10 SEWilco 217×342×8 28711 bytes <nowiki>Worldwide distribution of confirmed or inferred offshore gas hydrate-bearing sediments USGS Open-File Report 96-272 PD-USGov </nowiki> Gas hydrates |