The rock strata on the southeastern coast of the island have been eroded to form a marine erosion platform
On the eastern and northeastern coasts of the island, there are relatively dark basalts
Xikanshan was originally an independent hill
Later, it became a tombolo formed by a vast accumulation of coral debris
There is a raised beach rock terrain in the southeast of Xikanshan
Together with the accumulation layer in the north of Xikanshan, it accounts for about half of the area of the entire island and is another special terrain landscape of the small island
Due to its special geographical location, the birds and plants on this island are also very rich
At present, more than a hundred species of birds have been found
On the marine erosion platform outside the accumulation layer, stone fish traps are lined up in close succession and exposed above the sea surface after low tide
It is a place with a dense concentration of stone fish traps in Penghu
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