| Answer | Crossword Clue |
|---|---|
| REEF | Sand ridge |
| DUNE | Sand ridge |
| DUNE | Sand ridge. |
| BAR | Sand ridge |
| ESKER | Sand ridge |
| ESKER | Gravelly sand ridge |
| DUNE | Ridge of sand. |
| ESKER | Ridge of sand |
| ESKER | Narrow sand ridge |
| DUNE | Ridge of sand |
| AAS | Geological ridge of sand. |
| ESKER | Long ridge of sand |
| ESKER | Winding ridge of sand |
| ESKER | Narrow ridge of sand |
| DUNE | Ridge of sand created by the wind |
