I've been programs that mention where oil comes from, evidently plankton and the like from hundreds of millions of years ago when as far as I can tell the entire planet was twice as warm as it is now and everything was like a swamp and plant, and moss covered.
When companies are asked how it formed the answers are:
1. Oil and gas were formed by the anaerobic decay of organic material in conditions of increased temperature and pressure;
2. Oil and Natural gases have formed from the remains of plants and sea creatures;
3. Oil forms first, then as the temperature and pressure increase at greater depth gas begins to form;
4. Oil and gas form as the result of a precise sequence of environmental conditions:
A. The presence of organic material;
B. Organic remains being trapped and preserved in sediment;
C. The material is buried deeply and then slowly "cooked" by increased temperature and pressure.
We all know that as time passes everywhere on the planet has the same layers.
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