3) rock category hills Po (Noen, Po Formation PmTr):Rock this category appears to spread in the northern part of the Khao Chamao. Khao saming and north of Trat Province consists of shale, mudstone with feldspar and high gray to gray hues. Chert with feldspar high. Usually found fossils fuels cheewin type.In this type of stone, shale and limestone, and stone coarse red. Rock this category had during the end of the Permian to the early of the tri ash sik.
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