Examlex
Which one of the following is not a mineral?
Well-developed Soil
Soil that has gone through all stages of soil formation, resulting in distinct layers or horizons, and is capable of supporting plant life effectively.
Ash Blanketing
The covering of large areas with volcanic ash following an explosive volcanic eruption.
Pumice
Volcanic rock, especially of felsic or intermediate composition, containing many vesicles (holes) formed by expanding gases in magma.
Lava
Molten rock that has been expelled from a volcano during an eruption and solidifies as it cools on the Earth's surface.
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