Korean system

Japanese: 朝鮮系 - ちょうせんけい（英語表記）Chosŏn system

This refers to a series of strata from the Early Paleozoic Era (Cambrian to Middle Ordovician) on the Korean Peninsula. The Palaeozoic strata on the Korean Peninsula are represented by the Korean system and the Late Paleozoic Pyeongan system (Late Carboniferous to Permian to Triassic), but no strata from the Late Ordovician to Early Carboniferous have been confirmed. However, rocks containing Silurian and Devonian fossils have been reported as gravel in granite. The Korean system is widely distributed on the limestone plateau of central to eastern Korea (Taebaek Mountains) and the limestone plateau of northwestern Korea, and can be divided into the following two groups.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

朝鮮半島における前期古生代(カンブリア紀～中期オルドビス紀)の一連の地層をいう。朝鮮半島の古生層はこの朝鮮系と後期古生代の平安系Pyeongan system(後期石炭紀～二畳紀～三畳紀)で代表されるが，後期オルドビス紀～前期石炭紀の地層は確認されていない。しかしレキ岩中の礫（れき）としてシルル紀とデボン紀の化石を含む岩石が報告されている。朝鮮系は中～東部朝鮮の石灰岩台地(太白山脈)と北西朝鮮の石灰岩台地に広く分布し，次の二つに分けられる。

出典　株式会社平凡社世界大百科事典第２版について　情報

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