Young tephra deposits in volcanic ranges give rise to Regosols, or
Andosols in more weathered volcanic ash. Over time, these soils can
develop into Luvisols, Nitisols, Lixisols and Acrisols, and, ultimately,
into Ferralsols. The profile shows a young Andosol in the highlands
of Kenya. The soil is built-up from several volcanic eruptions, which
are recognisable from