if something can be used to determine a public of something else then that something can likely be used to determine that public of a whole of that something else & young is a public of fragrance ->  if something can be used to determine the age of a rock then that something can likely be used to determine the age of a part of a rock  if something can be used to determine the age of a rock then that something can likely be used to determine the age of a part of a rock & the theory of nucleotide can be used to determine the unlimited young of the stone ->  the law of superposition can be used to determine the relative age of part of a rock  the law of superposition can be used to determine the relative age of part of a rock & sedimentary stone is a mean of stone ->  the law of superposition can be used to determine the relative age of a part of sedimentary rock  the law of superposition can be used to determine the relative age of a part of sedimentary rock & arizona are a whole of sedimentary stone -> the law of superposition can be used to determine the age of sedimentary rock layers