系 (地层)
Sign in to saveidealized composite unit of the geologic record representing the totality of rock strata laid down during a certain period of the geologic time scale
Wikidata facts
- Part of
- erathem
Show 3 more facts
- different from
- period
- studied by
- chronostratigraphy
- standards body
- International Commission on Stratigraphy
Sources (1)
via Wikidata · CC0
Article · 中文
系（System）在地层学中指在同一相关地质年代内一道形成的岩层单元。相关地质时期为年代学时间单位，为地质年代的一部分，而“系”则是年代地层中的一种单位。系与岩石地层学无关，后者是根据岩石学来划分岩层。系是界的细分，而它自身则被再分为统和阶。
Abstract from DBpedia / Wikipedia · CC BY-SA