Calcium Carbonate (chalk) + Iron Oxide (rust) + Hydrogen Dioxide (Water) under great heat and pressure approximately 60 km below the surface of the earth produces hydrocarbons (Natural Gas and Petroleum).
Dead dinosaurs and dead plants are NOT involved.
Got ya
How does chalk and iron turn into hydrocarbons? I’m not saying you’re wrong, it just seems impossible. Also, isn’t the shale rock itself known to be an ancient sea bed?