1. Introduction

The surface of the earth is very uneven and never perfectly flat. It has highlands and lowlands; slopes of varying types -steep, gentle, long and gradual and some very abrupt features. There are depressions and cracks of different shapes and sizes. There are also large areas of almost flat land. Some are rocky, some sandy while the others are covered with soil and vegetation. These different land features that form a part of the larger landscapes (large tracts of the earth’s surface) are known as landforms. Each landform has a typical physical shape, size and material make up.