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It would be difficult to age crude oil because it depends where you get the crude from and crude oil moves around underground and becomes a blend of ages.


Most oil is from Jurassic and Cretaceous organic material

Crude oil is the organic remains of things that lived between 5 and 200+ million years ago. The age can be determined by the level of the organic compound oleanane

(flowering plants) and hopane

(bacteria). Because oleanane

is associated with angiosperms, the higher the concentrations of oleanane

the younger the crude (evolution of plants means further back you go, the less pollon).

No oleanane

would suggest the crude is more than 160 million years old.

A little oleanane

would make it 65~160 million years old.

A high concentration of oleanane

would make it relatively young, between 5~65 million years old.


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βˆ™ 11y ago
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Q: How old is crude oil?
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