.
Metalloids
Protons
Neutrons
Electrons
Relative; igneous
Absolute; igneous
Relative; sedimentary
Absolute; sedimentary
Oxygen and Carbon
Oxygen and Helium
Uranium and Carbon
Uranium and Helium
Relative
Absolute
Radioactive
Isotopic
Half-life
Radiocarbon emissions
Uniformitarianism
Intrusion capacity