Substrata, plural of substratum, may refer to: *

Earth's substrata The internal structure of Earth is the solid portion of the Earth, excluding its atmosphere and hydrosphere. The structure consists of an outer silicate solid crust, a highly viscous asthenosphere and solid mantle, a liquid outer core wh ...

, the geologic layering of the Earth *''

Hypokeimenon ''Hypokeimenon'' (Greek: ὑποκείμενον), later often material substratum, is a term in metaphysics which literally means the "underlying thing" (Latin: ''subiectum''). To search for the ''hypokeimenon'' is to search for that substance t ...

'', sometimes translated as ''substratum'', a concept in metaphysics * Substrata (album), a 1997 ambient music album by Biosphere **'' Substrata 2'', a 2001 double album by Biosphere, including a remaster of the 1997 album *

Substrata (gardening) Subsoil is the layer of soil under the topsoil on the surface of the ground. Like topsoil, it is composed of a variable mixture of small particles such as sand, silt and clay, but with a much lower percentage of organic matter and humus, and it ...

, another term for ''subsoil'' * Substrata (geology), layers of rock or sediment *

Substrata (linguistics) In linguistics, a stratum (Latin for "layer") or strate is a language that influences or is influenced by another through contact. A substratum or substrate is a language that has lower power or prestige than another, while a superstratum or sup ...

, languages which influence another through linguistic contact

See also