...The Massif Central also contains volcanic landforms that were created after the eruption, but the mudstone and schist have been eroded away to leave hard limestone, and the geological structure has a major influence on the topography. The area at the bottom of the V is a limestone plateau called the causse, with stalactites and deep canyons. The area surrounded by the V-shaped mountains is the Paris Basin, and the area below the left side of the V is the Aquitaine Basin. In these basins, soil and sand carried from the surrounding mountains were deposited from the Mesozoic to the Tertiary eras, forming a plate-like layer (limestone and mudstone almost alternately layered) that is slightly lower in the center and rises toward the periphery. ... *Some terminology explanations that mention "causse" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…マシフ・サントラルには,その後に噴火した火山地形もみられるが,泥岩や片岩が浸食されて硬い石灰岩が残っており,地質構造が大きく地形に影響している。V字の底にあたる地方には,コースcausseと呼ばれる石灰岩台地が広がり,鍾乳洞や深い峡谷がみられる。 V字状に並んだ山地に囲まれた部分がパリ盆地,V字の左辺下がアキテーヌ盆地で,これらの盆地には周辺山地から運ばれた土砂が中生代から第三紀にかけて堆積し,中央部にやや低く周辺部に向かって高まる皿のような地層(石灰岩と泥岩がほぼ交互に重なっている)を形成した。… ※「causse」について言及している用語解説の一部を掲載しています。 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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