This is the main process of chemical weathering. A typical example is the erosion that causes karst cycles in limestone regions. When calcium carbonate is dissolved by water containing carbon dioxide, calcium bicarbonate is produced. Because this reaction is reversible, stalactites and stalagmites form in the dissolved limestone caves (limestone caves). When limestone caves formed by erosion grow large, the ground surface collapses, forming dolines. (→ Karst topography ) Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
化学的風化作用の主体をなす作用。石灰岩地域にみられるカルスト輪廻を行う浸食がその代表例である。二酸化炭素を含む水によって炭酸カルシウムが溶解すると重炭酸カルシウムができる。この反応は可逆的であるため,溶かされた石灰洞 (鍾乳洞) 中に鍾乳石や石筍が生じる。また溶食によって生じた石灰洞が大きくなると,地表が落込みドリーネとなる。 (→カルスト地形 )
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