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| Description: Alberta contains oil sands (tar sands) = sand deposits with 1 - 20% bitumen, a thick form of petroleum rich in carbon, poor in hydrogen Degraded and chemically altered crude oil deposits Removed by strip mining Requires special extraction and refining processes to become useful Picture Stats: Views: 216 Filesize: 1.07MB Height: 967 Width: 948 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=36123 |