Karroo system

Japanese: カルー系 - カルーけい（英語表記）Karroo system

A geological formation consisting mainly of continental deposits from the late Paleozoic to early Mesozoic eras in the inland areas of South Africa, distributed over a wide area of Africa south of the equator and the island of Madagascar, known as the Great Karoo Basin. It is divided into four layers, characterized by an early glacial period (the Dwykian glacial period) and an end by a period of volcanic activity. The sedimentary rocks in between are mainly muddy and sandy rocks with gravel intercalations. The Dwykian glacial period began in the Devonian period and reached its peak in the Permian to Carboniferous periods. Glaciers and clastic material were transported from the four highlands around the periphery of the Great Karoo Basin.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

南アフリカの内陸地帯における古生代後期～中生代初期の陸成堆積物を主とする地層で，赤道以南のアフリカとマダガスカル島の広い地域にわたって分布し，大カルー盆地とよばれる。4層に分けられ，始まりは氷期(ドワイカ氷期)で終りは火山活動期で特徴づけられる。その間の堆積岩層は礫質（れきしつ）のはさみをもつ泥質･砂質岩を主とする。ドワイカ氷期はデボン紀に始まり，最盛期は二畳紀～石炭紀であった。氷河と砕屑物（さいせつぶつ）は大カルー盆地の外周の四つの高地から運ばれた。

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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