What is Rock Asphalt (Gilsonite)?

What is Rock Asphalt (Gilsonite)?

Rock asphalt is the “asphalt naturally occurred in nature” and is often called Gilsonite. Rock asphalt is a kind of bituminous substance which is produced by the comprehensive action of heat, pressure, oxidation, catalyst, and bacteria after the oil has been deposited and changed for hundreds of millions of years....

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