岩架上覆盖了厚厚的火山灰烬，其间点缀着火山玻璃珠和被称之为火山毛(Pele ' s hair)的熔岩细线。
The ledge was covered with heavy ash, called tephra, and speckled with droplets of volcanic glass and delicate lava threads known as Pele's hair.
岩（矿）棉和玻璃棉有时统称为矿物棉，它们都属于无机材料。
Rock (mine) cotton and glass cotton sometimes referred to as mineral wool, they all belong to inorganic materials.
火山岩包括黑曜岩火山玻璃。
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