Primum stratigraphiae principium, lex superpositionis dictum (strata profundiora antiquiora sunt) a Nicolao Stenone saeculo septemdecimo enuntiatum est.[1]
Bibliographia
Lexique stratigraphique international. Lutetiae: Centre National de la Recherche Scientifique, 1956–1962? Descriptio huius operis
F. Gradstein, J. Ogg, A. Smith, edd., A Geologic Time Scale 2004. Cantabrigiae: Cambridge University Press, 2004 Textus
A. Salvador, ed., International Stratigraphic Guide. A guide to stratigraphic classification, terminology and procedure. 2a ed. Trondheim: International Union of Geological Sciences, 1994