When more than half of the parent material is volcanic ash, the soil is a(n):
A)andisol
B)alfisol
C)histosol
D)aridisol

Question

Quizplus · Accepted Answer

Andisols are soils that are formed from volcanic ash and pumice. When more than half of the parent material is volcanic ash, the soil is considered an andisol. The other soil types listed are not specifically associated with volcanic ash as a predominant parent material.

When More Than Half of the Parent Material Is Volcanic