Across
1
Low-lying land surrounded by higher ground
4
Wearing away of land by water or wind
6
Large slow-moving mass of ice
8
Ridge of rock or coral near the surface
Down
2
Deep narrow valley with steep sides
3
Large natural stream of water
5
Region between the two tropic lines
7
Piece of land jutting into the sea
9
Raised area of land, smaller than a mountain
10
Large area covered with trees