Petroleum

Petroleum, also known as crude oil or simply oil, is a naturally occurring, yellowish-black liquid chemical mixture found in geological formations, consisting mainly of hydrocarbons. The term petroleum refers both to naturally occurring unprocessed crude oil, as well as to petroleum products that consist of refined crude oil.

unit of volume with different values

thumb|Kerogen can be found in oil shale

liquid petroleum that has a low density and flows freely at room temperature

crude oil from Naftalan, Azerbaijan

type of petroleum

liquids that were trapped in the pores of sedimentary rocks

Institutional corruption in the country

crude oil containing a high amount of the impurity sulfur

Wikimedia disambiguation page

based in Houston, Texas

aspect of history