foundation

Across

2. The bottom surface of the ocean or sea.
3. Wetland area, typically covered with water and vegetation.
4. The arrangement of physical features on the Earth's surface.
6. A mountain or hill with an opening for molten material.
8. The process of one tectonic plate sliding under another.
9. The top layer of the Earth's surface, supporting plant life.
14. A long, narrow inlet of the sea between steep cliffs.
15. Referring to large landmasses like continents.
16. A chain or group of islands.
20. The outline of land along the sea.
23. The solid rock layer beneath loose soil or sediment.
25. A landform at the mouth of a river, formed by sediment deposits.
26. A crack or split in the Earth's surface, often from tectonic forces.
27. Pertaining to an estuary or its characteristics.
29. An underground layer of water-bearing rock or sediment.
30. A crack or fracture in the Earth's surface.
32. A large mass of ice that moves slowly over land.
33. A low area of land where water collects.

Down

1. The area where a river meets the sea, with brackish water.
5. A landmass that is nearly surrounded by water but connected to the mainland.
7. A steep face of rock or earth.
10. Molten rock that erupts from a volcano.
11. A long, narrow elevated landform, often part of a mountain range.
12. A narrow, steep-sided valley formed by erosion.
13. Material that settles at the bottom of a liquid.
17. A deep ravine, typically with a river flowing through it.
18. A large, flat area of land with few changes in elevation.
19. A mass of debris left by a moving glacier.
21. Pertaining to soil or sediment deposited by a river.
22. A large, flat area of land elevated above the surrounding land.
24. The outermost layer of the Earth.
28. The bottom of a river where water flows.
31. Pertaining to the movement of Earth's plates.