pitchstone

pitchstone

1. Porphyritic Pitchstone

n. 斑状松脂岩(岩浆岩)

2. Keywords vitrified micro-drop;thermal insulating material;imbibition;pitchstone;

玻化微珠;保温材料;膨化;松脂岩;

3. Perlite, obsidian and pitchstone are volcanic glass having the same compositions commonly with rhyolite as well as andesite and basalt.

珍珠岩、黑耀岩和松脂岩等玻璃质熔岩以酸性为主，中基性者也常见。