Ko tapu is a limestone female per generation, or the age of approximately 295-250 million years, since the limestone is soluble corrosion from the property easily. Thus, the various island in the Phang Nga Bay, there are many strange shapes and patterns depending on the decay of the ruins of the island destroyed rock nail is associated with an ancient sea-level changes. And he leaned in the original Koh Tapu, East side exposed. connections the same as on the land. The movement of the crust. Cause there is a long fault to lean on the West through Phang Nga Bay. Called a fault this fault Marui Canal causing smaller joints move followed it can be seen from the fault that they live together and crack fault found in the limestone island of Tapu. In addition, the fault also caused the ruins of stone in the area of the seam between his nail and they leaned together to the East. Make him nail his ball striking is extracted at maximum when the sea is approximately 6000 years ago, the current level of about 4 meters above the level of the sea of water Koh Tapu causing erosion is water erosion concave stone joints to such a level. Later, the sea level reduction to address approximately 2.5 meters in altitude from sea level at present. The new sea level lower erosion of water Koh Tapu, a new concept is to erode the rock scratches on a level that most khot KIO.
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