Formation of headlands and bays:

The coastline consisted of parallel bands of hard and soft rock which were perpendicular to the sea. As a result of differential erosion, the bands of soft rock were eroded much more quickly than the bands of resistant rock to form BAYS ans HEADLANDS. The headlands will be eroded back as a result of wave refraction. Caves, arches, stacks, and stumps will form which will eventually erode away. The bays will advance as deposition will take place at their heads to form BAY-HEAD BEACHES. Eventually the coastline will become straight again and the whole process of differential erosion will resume again to result in an irregular coastline.