What areas on the earth have already endured for 65 million, 100 million,200, 300, 400, 500 million years already without changes? Obviously many areas have bee

What areas on the earth have already endured for 65 million, 100 million,200, 300, 400, 500 million years already without changes? Obviously many areas have been subducted via plate tectonics and after volcanic transformation at depth would leave no artifacts. Would you find gold rings on dinosaur fingers? Gold watches? We know gold can endure, and if these prior saurian techies had adornments, they may end up in sediments that can endure. How to find them? Catscans and MRI imaging could show dense metallic residues in some cases. So far there have been scans done on a few fossils, but if they were not looking for residues of artifacts, such residues may not have attracted attention. Funerary buildings? Pyramids are only a few thousand years old and many millions would turn them to dust on the surface, and subducted ones = melted away. There has been time for a 200 million year old race to be very very hard to find - except on the moon's surface? If there was a moon project 200 million years ago, would gradual meteoric impacts over this time period have buried them beyond finding? Direct impacts would have destroyed them utterly. Indirect impacts gradually bury the surface of the moon with impact scattered rock powder. We know the moon is deeply cratered and has a deep coating of impact dust. Metal landers would endure and gradually get some feet of accumulated dust, but various metal detectors would find them - but a huge area would need to be searched. I assume good dino-engineers would use aluminum and titanium instead of steel/iron, so ferrous metal detectors would not work. Even good detectors of conductors are good for only a few feet. So we may never find evidence of the war between the warlike dinosaurs of earth versus the Insectoids of Ganymede - that was won so decisively by the insectoids 65 million years ago with their impactor...