Dino Dating Conflicts: Carbon dating suggests less than 40,000 years old.

http://en.wikipedia.org/wiki/Radiocarbon_dating

"Radiocarbon dating(usually referred to as simply carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 (14C) to estimate the age of carbon-bearing materials up to about 58,000 to 62,000 years.[1]"

Carbon dating simply cannot be applied to dating material from 50 million years ago, not even close, there is simply not enough isotope left (and there is no organic material from that time left anyway), fossil from that era is basically a mineral, stone formed in the place where an organism used to be.