Geography

1. The process by which loose sediment is compacted and cemented into solid sedimentary rock.
3. rock
6. A steep, near-vertical rock face found on coastlines or river valleys.
8. drift The zigzag movement of sediment along a coastline caused by waves hitting at an angle.
9. fold mountain period Mayo formed around 400 million years ago, found in Ireland and Scotland
12. formed from cooled and solidified magma or lava, e.g. granite or basalt.
13. A sweeping bend or curve in a river caused by uneven erosion and deposition.
14. A fold mountain system running E–W, formed around 300 million years ago, found in Munster and Brittany.
15. When a glacier freezes around chunks of rock and pulls them away as it moves.
16. The wearing away and removal of rock or soil by water, wind, or ice.
17. valley A wide, flat-floored valley carved by a glacier, with steep sides and a U-shaped cross-section.
18. A sedimentary rock made mainly of calcium carbonate, often formed from marine shells.

2. The point where two rivers meet and join together.
4. lake A crescent-shaped lake formed when a meander is cut off from the main river.
5. erosion When a river cuts downward into its bed, deepening the valley.
7. A dark, fine-grained igneous rock formed from rapidly cooled volcanic lava.
10. Erosion caused by rocks and sediment scraping against a surface like sandpaper.
11. first major hydroelectric power station, built on the River Shannon in Co. Clare in the 1920s.