noun, noun which may take the genitive case particle 'no'
Cambrian system
Geological term for the rock strata deposited during the Cambrian period. Often used in scientific contexts.
この地域のカンブリア系からは三葉虫の化石が多く産出する。
Many trilobite fossils are found in the Cambrian system of this region.
カンブリア紀 refers to the Cambrian period (a time unit), while カンブリア系 refers to the rock layers deposited during that period (a stratigraphic unit).
From English 'Cambrian' + 系 (system). The term follows standard geological naming conventions.