
Having looked it up. Though I guess it's far from certain, seeing as homogenous black goop is difficult to reconstruct plants or animals from.
It's a good point, though. The oxygen in the atmosphere was originally an animal product, wasn't it?
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Mon 7 Feb 2005, 10:43,
archived)
It's a good point, though. The oxygen in the atmosphere was originally an animal product, wasn't it?

"Crude oil was made over millions of years from tiny plants and animals, called plankton."
From : www.schoolscience.co.uk/content/4/chemistry/petroleum/knowl/4/2index.htm?origin.html