Which fossil fuel takes the longest time to form?

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Which fossil fuel takes the longest time to form?
a) oil
b) black coal
c) brown coal
d0 natural gas?

I'm thinking either natural gas or black coal, but i suggest you to research it to get a more accurate answer.

2007-12-12 13:53:26 · answer #1 · answered by cutii4lyf 2 · 0⤊ 0⤋

Its been a while since petroleum geology but I would say oil.

But look it up for yourself.

2007-12-11 11:07:38 · answer #2 · answered by Lady Geologist 7 · 0⤊ 0⤋