That's one of those amazing undiscovered oil reserves that the economists are always harping on about.
I see it now, it had never dawned on me before, but the geologists have been wrong all this time

It's nothing to do with swamps, lakes, sediments & geological upheaval, silly them & silly me. Of course oil is an extrea terrestial occurence & is depostied in the earth at night, by liquid impact from space. That's why no one has seen it before.
That picture is obviously one that missed the earth & will probably land on another planet for use by us when we get there !
Problem solved. I'm off to the garage now to knock up a little shuttle tanker to pop off the Venus to get that oil reserve back here where it belongs

The roller coaster is still climbing, but it's near the top now !
Where there's a WAR there's a WAY
