| 31. | Heavy crude oil is closely related to natural bitumen from oil sands.
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| 32. | The ceiling is lined with sheet material and the floor is bitumen.
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| 33. | Daguragu is located 8 km north of Kalkaringi via a bitumen road.
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| 34. | In July 1943, International Bitumen Company reorganized as Oil Sands Limited.
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| 35. | The campus has bitumen-topped cross-street roads.
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| 36. | The whole structure was then bitumen'tanked'for waterproofing purposes.
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| 37. | It was one of the first bitumen roads in Queensland.
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| 38. | The stone has been subsequently overlaid with concrete and bitumen.
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| 39. | By 1942, the route was bitumen sealed between Brisbane and Eumundi.
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| 40. | Bitumen is the last residue in the refining process.
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