Related Clues:

• Channel blocker
• Fine-grained soil
• River mouth deposit
• Delta, essentially
• Not too often
• Once in a great while
• It builds up in bars
• Once in a long while
• Choke up, in a way
• Alluvial matter
• Sedimentary stuff
• Riverbed buildup
• Delta's buildup
• What may accumulate in the mouth
• Delta accumulation