The heat from a volcanic eruption releases all the argon from the molten rock and disperses it into the atmosphere.Argon then starts to re-accumulate at a constant rate in the newly formed rock that is created after the eruption.This damage is in the form of tiny marks called fission tracks.When volcanic rocks and minerals are formed, they do not contain fission tracks.These not only unproven assumptions but also very unlikely assumptions.Radioactive dating then can only be used to generally support the theory of evolution.Also any erosional loss of material or slight contamination would throw off any values. Molds, and casts are impressions in the rock containing no carbon.
An object can be given an approximate date by dating the volcanic layers occurring above and below the object.
Sedimentary rocks are rarely useful for dating because they are made up of bits of older rocks.
Uranium is present in many different rocks and minerals, usually in the form of uranium-238.
Mineralization of organic material is very common in fossils.
Obviously Carbon 14 can not be used in mineralized fossils.