I'm going to be doing a presentation for grade school children, and I'd like them to get a feel for how much source rock it takes to make oil.
It takes about a 10 foot layer of swamp debris to make a 1 foot layer of coal; how thick a layer of oil would that 1 foot of coal make when it converts to oil? (Think of the oil as a pure layer on top of the ground, not absorbed into some porous rock.)
I realize it's not that simplistic, but I'm talking to 6 year olds, so I don't need it exact just the order of magnitude.