这些群岛主要是由海洋生物残骸形成的石灰岩构成，潮汐滩的水下部分被流动的水分割成河道。
Made up mostly of limestone formed from the skeletal remains of sea creatures, the submerged regions of the tidal flats are carved by channels where water flows between land.
细小而形似植物的珊瑚生物死亡时会褪色变白，原因通常是不断升高的温度，留下的只是一具白色的石灰岩珊瑚礁骨架。
Bleaching occurs when the tiny plant-like coral organisms die, often because of higher temperatures, and leave behind only a white limestone reef skeleton.
当这些生物死后，它们的外壳便会沉入水底并逐渐堆积成厚厚的石灰岩层，这就是为什么在石灰岩中经常可发现一些生物化石的原因。
When these creatures died, their shells fell to the bottom and gradually built up thick layers of limestone. For this reason, fossils are commonly found in much limestone.
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