The pink stone is an Arkosic Sandstone, characterized by its claystone and reddish-brown sandstone layers. It is noted for its inclined strata in relation to horizontal levels, as well as the presence of pebble and sandstone in the upper layers of the rock sequence. Below the rock stratification, you can find fossils of bivalves from freshwater and brackish environments. This information about the JKL rocks comes from dmr.go.th. The rocks are primarily formed from coastal sediment and debris from the foothills, influenced by tidal movements. They can be found in areas like wetlands, tidal floodplains, and mangrove environments.