'Scoria, a dark, glassy rock created from this, is heavier than pumice & has bigger holes'
lava
ROCKS & MINERALS: Scoria, a dark, glassy rock created from this, is heavier than pumice & has bigger holes
Scoria, a dark, glassy rock created from this, is heavier than pumice & has bigger holes
Scoria, a dark, glassy rock created from this, is heavier than pumice & has bigger holes
ROCKS & MINERALS
lava
ROCKS & MINERALS