Table 3

. Simple terrain types that make up macro-scale landforms

NumberTerrain nameDescriptionLandform categoriesfrom Table 1
1HillsProject upwards and are as long as they are wide1, 2 and 3
2RidgesProject upwards but are elongate; can be a subset of hills or mountains depending on elevation1, 2 and 3
3MountainsProject upwards, are larger than hills reaching heights in excess of 300 m above the surrounding terrain1, 2 and 3
4PlainsRelatively flat areas often at low elevations2, 3 and 4
5ValleysElongate depressions, usually open at one or both ends2, 3 and 4
6BasinsNormally as wide as they are long and are enclosed2, 3 and 4