Ko tapu is a limestone about 250 million years ago-295. The original Koh Tapu island and he leaned the East junction with the same conditions as, and on the land.
Spike Island is between about 295-250 million years old limestone James Bond Island and the east of them, leaning down to connect the same piece. And on land
Spike island is a limestone are about 295-250 million years. The original Huangshan and the island's against the east side is connected as the same, and on the earth.