scoria
Porous lava fragments
Scoria is rough, porous volcanic rock formed when lava cools rapidly while gas bubbles are still escaping.
The result is a dark, cindery material riddled with cavities—lighter than solid rock but too dense to float like pumite.
Scoria often accumulates around volcanic vents, forming cinder cones.
It's used in landscaping, drainage beds, and as lightweight aggregate in concrete.
Allowing passage of fluids
- vesicularHaving small sacs
- cellularComposed of small units
- lightweightLacking mass or importance
- aeratedCharged with gas
spongy · permeable · rough · jagged · abrasive · frothy · bubbly · cindery
Start burning something
- basaltFine-grained volcanic stone
- andesiteIntermediate volcanic rock
- vesicularHaving small sacs
- extrusiveExpelled and solidified outside
lava · magma · crystallize · silicate · xenolith · petrology · mineralogy · stratigraphy
porous
Allowing passage of fluids
- vesicularHaving small sacs
- cellularComposed of small units
- lightweightLacking mass or importance
aerated · spongy · permeable · rough · jagged · abrasive · frothy · bubbly · cindery · coarse
ignite
Start burning something
extrusive · lava · magma · crystallize · silicate · xenolith · petrology · mineralogy · stratigraphy · igneous
cinder
Combustion residue fragment
- tephraEjected volcanic material
- pyroclasticHot eruption debris
- pumiceLightweight volcanic abrasive
ash · bomb · ejecta · eruption · crater · vent · cone · caldera · fumarole · obsidian
slag
Industrial metalworking byproduct
- smeltingExtracting metal from ore
- foundryMetal casting facility
- metallurgyScience of extracting metals
clinker · furnace · byproduct · refractory · iron · steel · aggregate · cement · concrete · construction
- mafic rocksbasalt, gabbro, diabase, dolerite
- rocksbasalt, granite, sandstone, marble, shale
- volcanic activityeruption, active, lava, dormant, magma
- volcanoesvolcano, volcanic eruption, Mount Fuji, volcanic eruptions, caldera
- volcaniclava, magma, tephra, pumice, ash fall
- Volcanismmagma, eruption, lava flow, volcanic eruption, magma chamber