Vast 'pumice raft' found drifting through Pacific OceanVast 'pumice raft' found drifting through Pacific Ocean External linkA vast "raft" of volcanic rocks stretching over 150 sq km (58 sq miles) is drifting through the Pacific Ocean, scientists say.The sea of pumice - the size of 20,000 football fields - was first reported by Australian sailors earlier this month.TagsflotsamoceanpumicevolcanoContent typeLINK