Weathered rock material and minerals that have accumulated in place at Earth's surface through chemical breakdown by exposure to air and water.
From Latin 'eluvies' (things washed out), derived from 'eluere' (to wash out), referring to material that results from place-based weathering rather than transportation.
Eluvium is what's left when a rock stops being a rock—it's the intermediate stage between solid stone and soil, and it's absolutely crucial for soil formation that feeds every plant on Earth.
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