how do petroleum and natural gas occur in nature
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Petroleum (also known as crude oil or simply oil) is a fossil fuel that was formed from the remains of ancient marine organisms. Millions of years ago, algae and plants lived in shallow seas. After dying and sinking to the seafloor, the organic material mixed with other sediments and was buried.............
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Petroleum is found at moderate depths(500m-2000m) between two layers of imprevious rocks. Petroleum deposits are usually found mixed with salt water. Petroleum, being lighter than salt water, and floats over it. Natural gas is found above petroleum, it is trapped between the rock cap and the petroleum layer
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