กรมทรัพยากรธรณี · river sand, lake sand, dune sand ousqu (good or...
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- กรมทรัพยากรธรณี · river sand, lake sand, dune sand Ousqu (good or poor sorting) L v1ntYu (good sorting) quartz, cristobalite lechatelierite chalcedony
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Post on 19-Jul-2020
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