Fe oxide, quartz, biotite, olivine. In the absence of metamorphism, the radiometric date of a mineral records the time of crystallization. The best parent daughter pairs for radiometric dating are those in which parent and daughter elements have different valences. The best minerals for radiometric dating are those in which, at the time of crystallization, the parent isotope is rare and the daughter isotope is common. Chemical weathering is enhanced by the formation of joints and by physical weathering.
Dolomite is much more common in Paleozoic rocks than in Tertiary rocks and sediments.
A formation is a mappable, lithologically distinct body of sedimentary rock having upper and lower contacts which are the same age everywhere the formation occurs. The distance of a seismic station from the focus of an earthquake can be determined by knowing the magnitude of the ground motion. Match the characteristic with the soil.