When I was little, a certain gas company used to advertise with some dinosaur that turned into oil. and then they sold the oil to my parents in the form of gasoline. How nice to be turned into gasoline after millions of years. I'm sure the dinosaurs like being useful. That's not true, of course. Pete moss and similar plants, compressed over time, are what really created oil.
What brought this on? Don't know, really. except I saw one of those old oil signs and got to reminiscing.