I am a climate scientist and geologist and think that climate, geology, and geography are incredibly interesting fields that people deserve to know more about. If you have any questions that you’ve sat with for a while, are just curious, want to know more about future or past scenarios, or even have worldbuilding questions, feel free to ask!
Just after giving it a cursory glance, I can see that they included many types of rock and have gone as far as including rocks that form in very specific contexts, so I am pretty sure they did their research! You don’t accidentally include igneous intrusions in your game when most people do not know they exist.