C-horizon meaning

sēhərīzən
In ABC soil, the lowermost zone, consisting mainly of unconsolidated, weathered rock fragments.
noun
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The third soil zone, consisting of material essentially unaltered by weathering, solution, or the action of plant roots.
noun
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In ABC soil, the lowermost zone, consisting mainly of unconsolidated, weathered rock fragments. By comparison with the A and B horizons, the C horizon is relatively unaffected by the processes of soil formation and therefore does not exhibit as much internal layering.
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