ocr: NATURAL GAS AND OIL 1. 3. Millions of sea organisms tiny The oil and the gas pores slowly and rose cracks years ago, through died and were buried under 4. the seabed The oil and gas became trapped by a layer of nonporous rock and formed a 2. deposit As the organisms were buried, they heated up and oil and natural gas formed in porous Fault sedimentary rock Nonporous rock
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