海穴

Grotto

澳洲海岸線綿長,「海穴」是其中一個地理特徵,當水積聚,並慢慢滲透,最終腐蝕地表,形成大坑,就是「海穴」了。

 

Australia has a beautiful long coast line. ‘Grotto’ is one of the many geographic features.

  1. Water fills a swampy depression.

  2. Water seeps through the clay surface to the limestone below.

  3. Weak acids begin to dissolve the limestone layers.

  4. A sinkhole is formed which, in time, becomes bigger and shapes the Grotto.

Source: Parks VICTORIA

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