If it indeed is our world/planet that is supposed to be the First Age and it has been ages before us, shouldn't there be some traces we would've found with the technology we have? Especially since we can actually date the age of our planet.

Does this mean that at the initiation of every new Age there undergoes some major changes on universal level? An actual reforming of (at least) our planet, making it a clean slate? And I'm referring to changes coming from the Wheel and/or Creator itself. Not like during the Breaking where mankind did all the job.

This also makes me wonder why people in the Third (and presumably also the Second) Age has access to artefacts like the Mercedes Benz logo. Is there some major "reset" every whole turn between the Seventh and First age (explaining the lack of any traces in our time)?