I'm not an expert in archeology but from my understanding, we can gain alot of information from bones that could lead such a finding. For instance, carbon dati

I'm not an expert in archeology but from my understanding, we can gain alot of information from bones that could lead such a finding. For instance, carbon dating and analysing the ethnic origins of the skeleton could lead you to say that you have an Australian (Australoid) fossil from 20,000 years ago. If you found that in Northern America that would raise serious questions about where exactly it was found and if it was moved since it doesn't fit within any of our current understandings of migration patterns.