Across
- 4. – Coastal rock tower left by erosion
- 6. – Mix of fresh and salt water
- 8. – Ocean water movement caused by the moon
- 10. – Natural underground space or chamber
- 12. – Builds up from the cave floor
- 13. – Soft rock that dissolves easily in acidic water
- 16. – Structure built by coral in shallow seas
- 17. – Ring-shaped coral island with a central lagoon
- 18. – Wetland park with sawgrass and slow-moving water
Down
- 1. – Florida park with coral reefs and islands
- 2. – Landscape formed by dissolving rock, often has sinkholes
- 3. – Hangs from a cave ceiling like an icicle
- 4. – Ground collapse caused by underground erosion
- 5. – Underground rock layer that stores water
- 6. – Long narrow island protecting the coast
- 7. – Texas park with fossilized reef rocks
- 9. – New Mexico cave park with huge chambers
- 11. – National park with the world’s longest cave
- 14. – The hobby of exploring caves
- 15. – Wears away rocks by wind, water, or ice