Question

found deep inside the earth crust and also in shaft of extinct volcanoes
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Answer 1

Answer:

Petroleum is a dark coloured thick crude oil found deep below the ground in certain areas.

It is called as Petroleum because it is found under the crust of earth trapped in rocks.

Petroleum occurs deep under the surface of the earth between two layers of impervious rocks. As petroleum is lighter than water it floats over water.

Explanation:

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