Regolith vs Solum - What's the difference?
regolith | solum |
(geology) The layer of loose rock, dust, sand, and soil, resting on the bedrock, that constitutes the surface layer of most dry land on earth, the moon, and other large solid aggregated celestial objects. There can also be sub-marine regolith.)
Within a soil profile, a set of related soil horizons that share the same cycle of pedogenic processes.
The upper layers of a soil profile that are affected by climate.