Subject: I know that carbon dating was not foundede until 1949.

I am doing a school paper. I know there are several dating methods such as 
carbon-14 patassium -argon and many others. Do you need to know how old a bone 
is preceived to be before you can date it properly.If so how do you know how 
old it is before you date. If your answear is index fossils how do you know how 
old they are before you date them?
Thank you so much

Issac

Re: I know that carbon dating was not foundede until 1949.