this may be a dumb question but when I search their formation, they are are both dead organic matters that were buried long ago and subjected to pressure and heat. what separates them from turning into coal or petroleum?
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Coal is formed by land based matter e.g. trees and plants etc.
Oil is formed by much smaller marine organisms within the oceans. Sometimes, over millions of years the sea can dry out and you’re left with a desert which would explain oil rich land such as the Middle East.
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