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#deposition
#marine sediment
#sandstone
#clastic rock
#compaction
#cementation
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#deposition
#water transport
#river sediment
#marine sediment
#settling
#alluvium
#silt
#erosion
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#phosphorite
#phosphate rock
#marine sediment
#sedimentary rock
#fossil bone rock
#apatite
#marine deposit
#deposition #marine sediment #sandstone #clastic rock #compaction #cementation