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.
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。
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Currently the project focuses on two types of forest environment - the submerged forests or "igapos" and the "terra firme", or dry land.