See Also: scoria(dictionary)
scoria(encyclopedia)

scoria (sh)




Heavy, dark, glassy igneous rock that contains many bubblelike cavities.

Foamlike scoria, in which the bubbles are very thin shells of solidified basaltic magma, occurs as a product of explosive eruptions (as on Hawaii) and as frothy crusts on some lavas. Other scoria, sometimes called volcanic cinder, resembles clinkers, or cinders from a coal furnace.