“dead dinosaurs”
The ‘Dino Theory’ has never held up under rigorous scientific scrutiny and analysis.
The ‘Abiotic Theory’ makes much more sense, and is in alignment with observed physical findings, including those of other worlds, such as the moon, Titan, which has seas of hydrocarbons.
It comes from algae that died and fell into the bowels of the ocean. All oil is associated with basins. To my knowledge, there is never been a drop found outside of a sedimentary basin.