또한 해안에서 관찰되는 편마암에서는 마치 칼로 흠집을 낸 것처럼 줄무늬 중 흰색 부분만 도드라져 보이며, 이는 편마암의 검은 부분이 덜 단단하기 때문에 파도에 의해 더 쉽게 깎여 나가면서 형성된 것이다.
In addition, in the gneiss observed from the coast, only the white part of the stripes appears as if it was scratched with a knife, and this was formed by being cut off more easily by waves because the black part of the gneiss was less hard.