what causes a headland
1 12. 2  Textbook p. 145 1.2 Wave refractionWave refraction causes headlands to be the focus of wave energy and thus the focus of erosion.Wave energy is weakened along the wider stretches in the bays, so waves deposit sediments at bays. 3  13. 3. Textbook p. 144 Headlands and baysHeadlands and bays form along a coast that is made up of bands of rock with v a r y ing r e s i s t a n c e to erosion.