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Petroleum, or crude oil, is a smelly, yellow-to-black liquid and is usually found in underground areas called reservoirs.
Oil was formed from the remains of animals and plants (diatoms) that lived millions of years ago in a marine (water) environment before the dinosaurs.

Petroleum - Wikipedia

en.wikipedia.org/wiki/Petroleum

Petroleum is a naturally occurring, yellow-to-black liquid found in geological formations .... Williams extracted 1.5 million litres of crude oil by 1860, refining much of it into kerosene lamp oil....

What is Crude Oil? A Detailed Explanation on this Essential Fossil ...

oilprice.com/Energy/Crude-Oil/What-Is-Crude-Oil-A-Detailed-Explanation-On-This-Essential-Fossil-Fuel.html

Jul 24, 2009 ... Rather than using drills, crude oil is extracted from oil sands through strip mining or a variety of other techniques used to reduce the viscosity of ...

Standard Grade Bitesize Chemistry - How crude oil was formed - BBC

www.bbc.co.uk/bitesize/standard/chemistry/materialsfromoil/how_crude_oil_was_formed/revision/1/

A BBC Bitesize secondary school revision resource for Standard Grade Chemistry on how crude oil was formed: fossil fuels, porous rock, non-porous rock.

What is Oil? - San Joaquin Valley Geology

www.sjvgeology.org/oil/oil.html

Oct 16, 2015 ... In most oils, the saturate fraction is the largest and is made up of two ... Most crude oil formed from one-celled plants and animals, called ...

The Mysterious Origin and Supply of Oil - Live Science

www.livescience.com/9404-mysterious-origin-supply-oil.html

Oct 10, 2005 ... But where does oil really come from, and how much is left? ... objects formed from the same raw material as Earth, that crude oil might exist on ...

What is crude oil? | gcse-revision, chemistry, carbon-compounds ...

revisionworld.com/gcse-revision/chemistry/carbon-compounds/what-crude-oil

Crude oil is a mixture of a very large number of compounds. It is formed from the remains of plants and animals which died millions of years ago. This is why it is ...

www.ask.com/youtube?q=What Is Crude Oil Made of&v=7ZQqo7bmy9A
Feb 12, 2013 ... How Crude Oil Forms in the Earth ... The conditions for the formation and storage of oil underneath the surface of ... How It's Made 34,818 views.

What If Crude Oil Is Likely NOT Fossil Fuel! Not Created From Dead ...

www.cuttingedge.org/News/n2268.cfm

What if crude oil is non-biological and the Earth creates new supplies ... N.A.S.A. (National Aeronautics and Space Administration made the initial discovery!

How is crude oil formed? - Quora

www.quora.com/How-is-crude-oil-formed

The origins of petroleum and mechanisms through which it was accumulated in large reservoirs has always been a controversial subject. It comes down to two ...