He separated these layers into 6 different spectra, labeled zones U through Z. The law of superposition is important to note when discussing sedimentary layers; this law states that more recent layers of soil dispersal will overlie older ones.
He separated these layers into 6 different spectra.6 different spectra was labeled zones U through Z. The law of superposition is important to note when discussing sedimentary layers Z. More recent layers of soil dispersal will overlie older ones. This is what this law states.