Sediment layer chronology is established using radiometric dating and stratigraphic principles, as demonstrated by multiple geochronological and stratigraphical studies.
The retrieved papers consistently show that sediment layer chronologies and geological time scales are constructed by combining radiometric dating methods (such as Ar-Ar, Pb-210, and Cs-137) with stratigraphic principles (such as biostratigraphy, magnetostratigraphy, and sequence stratigraphy). All applicable papers support the claim, and none refute it.