scoria
noun [ C or U ] geology specialized uk/ˈskɔː.ri.ə/ us/ˈskɔːr.i.ə/ scoriae
火山渣
a dark-coloured rock containing a lot of small holes, formed by lava (= hot liquid rock) from a volcano
The sides of the hill were thickly covered with scoria. 山坡上覆盖着厚厚的火山渣。
The scoriae fragments are of all sizes from huge blocks down to minute granular dust. 火山残渣的碎片大小不一，从巨大的石块到细小的颗粒状灰尘都有。
- More examples
- Made from volcanic scoria and aluminium and weighing 40 tons, the sculpture is an awesome sight.
- After crossing the crater ice and a short scoria slope, it arrives at the summit rocks.
- Ash, scoria and pumice produced during volcanic eruptions is called tephra.