A volcanic bomb is a chunk of ejected viscous lava larger than a lapilli, being over 64 mm.
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Category: <span>L</span>
Molten volcanic rock, still in a hot viscous state and not yet solid
A blue semi precious stone, frequently used in jewelry for at least 3,500 years
Small volcanic ejections of solid lava which range from 2 and 64 millimeters in size
A hydrous form of iron oxide
A sedimentary rock type made of calcium carbonate.
Calcium oxide, CaO or powdered calcium carbonate, CaCO
A green form of titanite
Brownish-black form of coal
Subterraneous horizontal passages in a mine, the usual intersection of a mine shaft