subsoil

Excavators are then used to dig out the top soil and subsoil.

“They believe that if they replace its cultural subsoil, if they bring in millions of people from new ethnic groups which are not rooted in Christian culture, then they will transform Europe according to their conception.”

Taiwan’s religious diversity and vitality forms a kind of subsoil of the self-governed island’s identity and values.

If you dig a burial pit into the subsoil, when you take the dead out and backfill it, the soil will be a different color.

This man’s house is located in a region with dense clay subsoil.