Why is radiometric dating important
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.Others like fossilized wood have had the organic material completely replaced by minerals.Radioactive dating can only provide indirect evidence for evolution.Radioactive dating can provide supporting evidence for evolution.The extra neutrons in Carbon-14’s case make it radioactive (thus the term, radiocarbon).
The rock layers below or above a sedimentary layer can be approximately dated using radioactive decay.
How It Works: Carbon has 3 isotopic forms: Carbon-12, Carbon-13, and Carbon-14.
The numbers refer to the atomic weight, so Carbon-12 has 6 protons and 6 neutrons, Carbon-13 has 6 protons and 7 neutrons, and Carbon-14 has 6 protons and 8 neutrons.
Igneous incursions into sedimentary layers can be dated using Uranium decay. Again small changes in the amount of Uranium or the amount of Lead can lead to large differences in the estimated age of the igneous layers.
Also the calculation are based on assumptions that the layer started with no lead and 100% uranium and no erosion has occurred.