Asking how you could tell if Dinosaurs had a civilization like ours used to be a standard Geology Dept. PhD orals question. Their cities would of course be long

Asking how you could tell if Dinosaurs had a civilization like ours used to be a standard Geology Dept. PhD orals question. Their cities would of course be long long, so that's not a productive search area. The answer is you'd look at the distribution of minerals. If they built cities with skyscrapers they would have had to mine the materials required to make them. There is no evidence the Dinosaurs exploited their available mineral sources but millions of years from now there will still be ample evidence that we did.