Geological ore deposits
Kerogen: a solid organic material that yields petroleum-type hydrocarbons on heating and distillation. Tar pits: small areas where soft asphaltic tar wells up to the surface and fills a hollow. Oil shale: this is a fine-grained black or dark grey clay-rich sedimentary rock that yields liquid hydrocarbons upon distillation (i.e. heating).
قرأ أكثر