First 90 words of the document:
Hard coastlines are harder to erode and are made up of rocks such as chalk and
limestone. When areas of soft and hard rock are near each other, bays and
headlands are formed from the fast erosion of the soft coastline, and the slower
process on the hard coastline.
This picture shows us a soft coastline, where the soft cliffs are slumping, and are easily eroded.
This picture , however, shows us Old harry, a stack and a feature of a hard, chalk coastline