http://netvouz.com/xlakemi/tag/largest-known?feed=rss xlakemi's bookmarks tagged "largest-known" on Netvouz http://www.canadianencyclopedia.ca/index.cfm?PgNm=TCE&Params=A1SEC817010 Bitumen is the heaviest, thickest form of PETROLEUM . The 2 largest-known sources of bitumen (in Alberta and Venezuela) each contain more petroleum than the entire proven conventional oil reserves of the Persian Gulf. Investment research xlakemi Mon, 29 Jan 2007 03:44:44 GMT