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Tar sand

Tar sand Tar sand is combination of sands, sandstones, or diatomaceous earth, saturated with relatively heavy hydrocarbon materials resembling low gravity crude petroleum. The tar sand is surveys of these deposits have revealed that they ...

Gilsonite Utah

Gilsonite Utah Gilsonite Utah is a black, brittle, lustrous mineral consisting of hydrocarbons, chiefly found in the Southwestern section of the United States, principally in Utah and Colorado. Gilsonite especially that ...

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