Wouldn't that make an ever stronger case for a previous civilization? An advanced civilization would build things, use them day to day, and eventually they would just collapse again on the surface of the Earth.
lmilcin raises a great point that many surface deposits of material that help "jump start" a civilization would have been consumed, but would the decay of our civilization return those same materials back into the surface, ready for the next round of civ to extract it?
I'd imagine elements that end up being used in very small quantities would be trickier. Reclaiming materials from phones isn't economically viable even with our tech today.
I think any industrial civilization will not hesitate to use things that are lying on the ground. It is the definition of "industrial" to be efficient with what you are given.
It is possible we had other "types" of civilizations the way we had a dozen ancient civilizations exist akin to false jump starts like some kind of experiments but never reaching industrial level.