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Petroleum - Wikipedia
The term petroleum refers to both naturally occurring unprocessed crude oil, as well as to petroleum products that consist of refined crude oil. Petroleum is a fossil fuel formed over millions of years from anaerobic decay of organic materials from buried prehistoric organisms, particularly plankton and algae.

Petroleum | Energy, Products, & Facts | Britannica
Petroleum is a complex mixture of hydrocarbons that occur on Earth in liquid, gaseous, or solid form. The term is often restricted to the liquid form, commonly called crude oil.

What is Petroleum: Definition, Formation, Constituents, Types and Uses
Petroleum, a naturally occurring liquid found beneath the earth’s surface, originates from the decomposition of organic matter over millions of years. The formation of petroleum begins with ancient marine organisms, such as plankton and algae, settling at the bottom of oceans and seas.

Petroleum - National Geographic Society
Petroleum, also called crude oil, is a fossil fuel. Like coal and natural gas, petroleum was formed from the remains of ancient marine organisms, such as plants, algae, and bacteria.

What is petroleum, and where does it come from? - ZME Science
Petroleum (from the old Greek petra, meaning stone and oleum meaning oil), also known as crude oil, is a fluid mix of liquid and gaseous hydrocarbons, inorganic chemical elements, and physical ...

Oil and petroleum products explained - U.S. Energy Information ...
Over millions of years, the remains of these animals and plants were covered by layers of sand, silt, and rock. Heat and pressure from these layers turned the remains into what we now call crude oil or petroleum. The word petroleum means rock oil or oil from the earth.

Petroleum | Journal | ScienceDirect.com by Elsevier
Read the latest articles of Petroleum at ScienceDirect.com, Elsevier’s leading platform of peer-reviewed scholarly literature

Understanding Petroleum: Importance, Uses, and Investment Strategies
Explore what petroleum is, why it's crucial for the global economy, and learn about ways to invest in the oil industry, including stocks, ETFs, and futures.

PETROLEUM Definition & Meaning - Merriam-Webster
The meaning of PETROLEUM is an oily flammable bituminous liquid that may vary from almost colorless to black, occurs in many places in the upper strata of the earth, is a complex mixture of hydrocarbons with small amounts of other substances, and is prepared for use as gasoline, naphtha, or other products by various refining processes.

Petroleum - Energy Education
Petroleum traps energy, first originating from the Sun, that was captured by photosynthetic plankton in ancient oceans. Just like coal, petroleum is a type of fossil fuel.