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absolute dating is based on calculations of the age of rock strata based on half lives of minerals, relative dating is based on the assumed age of fossils found in the strata and the laws of super imposition. The absolute dating is based on calculation of half life.The calculation are based on the percentages of parent, and daughter elements.The timeline established by the theory of Darwinian evolution ultimately determines the age of fossils found in any given strata.The law of superimposition that the oldest fossils are found on the bottom is superseded by the law of decent with modification that the simplest fossils are the oldest and the youngest fossils are the most complex.Ager, Derek I can think of no cases of radioactive decay being used to date fossils.( New Scientist Nov 10 1983 page 425 Both absolute dating and relative dating are determined by the evolutionary timeline and are used to support the evolutionary timeline.While in the absolute dating, isotopes of carbon are used for dating fossils.The absolute dating is more precise than relative dating because it tells the exact age of the fossils.
The fossils which are buried deep inside the earth are more ancient.The age determined by relative dating is based on the rules of super imposition and the presumed age of strata based on fossils.The deeper strata is presumed to be older than strata above.Half time is the time needed for half of a given quantity of an isotope to decay in its byproducts.Comparing the quantity of the parent form and the byproduct will give a numerical value for the age of the material containing such isotopes.
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These calculations are based on geological assumptions of uniform process, the lack of erosion of either the parent or daughter elements.