Superstratum vs. Substratum

Superstratumnoun

(geology) A stratum that is on top of another

Superstratumnoun

(linguistics) A language imposed upon a population that previously spoke another language

Superstratumnoun

A stratum, or layer, above another.

Substratumnoun

A layer that lies underneath another.

Substratumnoun

(figuratively) The underlying cause or basis of something.

Substratumnoun

(linguistics) A substrate.

Substratumnoun

That which is laid or spread under; that which underlies something, as a layer of earth lying under another; specifically (Agric.), the subsoil.

Substratumnoun

The permanent subject of qualities or cause of phenomena; substance.

Substratumnoun

any stratum lying underneath another