superposition principle

English Thesaurus

1. (geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest (noun.cognition)

hypernym	:	principle, rule,
definition	:	a rule or law concerning a natural phenomenon or the function of a complex system (noun.cognition)

domain category	:	geology,
definition	:	a science that deals with the history of the earth as recorded in rocks (noun.cognition)