Some rocks from volcanoes break down to form blacksand.
有些火山岩被撞碎后会形成黑色的沙。
2
We dug our pans into blacksand and gravel and began swirling and sifting until only a large tablespoon's worth of material was left.
我们在采金锅里装进黑色的沙土和砾石,开始不断的摇动和筛选,最后只剩下一汤匙那么多的东西。
3
Located on the Big Island of Hawaii, the beach gets its rare color from eroded blacksand particles that were created by volcanic lava flowing into the ocean and then cooling.