Ruan rock composed of clay Sand and gravel are sediments that accumulated by water from the river stream blows bring (alluvial sediments) or caused by sediment that accumulated by the Sea (marine sediments) mainly coarse grain sediment. If the sludge is equally round with good stability and will fill this gap as much as good sources of groundwater in eastern areas have sedimentary rocks, including sedimentary rocks, ruan major, ruan basin range. Sedimentary rocks of the coastal basin ruan Sedimentary rocks and sedimentary rocks, River taphak ruan ruan Hill.
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