Historical evidence of a sea floor from 500 million years ago

Sandstone of the Cambrian period Khao To Ngai geological time boundary La Ngu district

 

541 – 485 million years ago

The geology of the Satun Geopark terrain was a sea floor dating more than 500 million years ago in the Cambrian Period, which was when the sandy sea floor was teeming with various species of strange-looking animals.

Certain creatures resembling today’s horseshoe crabs were called trilobites, the fossils of which on Tarutao Island are evidence that such animals once existed around there.