Stratification may refer to:
Mathematics
*
Stratification (mathematics), any consistent assignment of numbers to predicate symbols
*
Data stratification in statistics
Earth sciences
*
Stable and unstable stratification
Stable stratification of fluids occurs when each layer is less dense than the one below it. Unstable stratification is when each layer is denser than the one below it.
Buoyancy forces tend to preserve stable stratification; the higher layers ...
* Stratification, or
stratum
In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ei ...
, the layering of rocks
*
Stratification (archeology)
Stratigraphy is a key concept to modern archaeological theory and practice. Modern excavation techniques are based on stratigraphic principles. The concept derives from the geological use of the idea that sedimentation takes place according t ...
, the formation of layers (strata) in which objects are found
*
Stratification (water)
Stratification is the separation of water in layers. Two main types of stratification of water are uniform and layered stratification. Layered stratification occurs in all ocean basins. Stratified layers act as a barrier to the mixing of water, whi ...
, the formation of water layers based on temperature (and salinity, in oceans)
*
Lake stratification, the formation of water layers based on temperature, with mixing in the spring and fall in seasonal climates.
*
Atmospheric stratification, the dividing of the Earth's atmosphere into strata
*
Inversion (meteorology)
In meteorology, an inversion is a deviation from the normal change of an atmosphere, atmospheric property with altitude. It almost always refers to an inversion of the air temperature lapse rate, in which case it is called a temperature in ...
Social sciences
*
Social stratification
Social stratification refers to a society's categorization of its people into groups based on socioeconomic factors like wealth, income, race, education, ethnicity, gender, occupation, social status, or derived power (social and political). As ...
, the dividing of a society into levels based on power or socioeconomic status
Biology
*
Stratification (seeds), where seeds are treated to simulate winter conditions so that germination may occur
*
Stratification (clinical trials), partitioning of subjects by a factors other than the intervention
*
Stratification (vegetation), the vertical layering of vegetation e.g. within a forest
*
Population stratification, the stratification of a genetic population based on allele frequencies
Linguistics
*
Stratification (linguistics), the idea that
language is organized in hierarchically ordered strata (such as
phonology,
morphology,
syntax
In linguistics, syntax () is the study of how words and morphemes combine to form larger units such as phrases and sentences. Central concerns of syntax include word order, grammatical relations, hierarchical sentence structure ( constituency) ...
, and
semantics).
See also
*
Destratification (disambiguation)
Destratification may refer to:
* Thermal destratification, mixing air to reduce stratified layers of heat that become trapped near the ceiling in buildings
* Lake stratification
Lake stratification is the tendency of lakes to form separate an ...
*
Fuel stratified injection
Gasoline direct injection (GDI), also known as petrol direct injection (PDI), is a mixture formation system for internal combustion engines that run on gasoline (petrol), where fuel is injected into the combustion chamber. This is distinct fro ...
*
Layer (disambiguation)
Layer or layered may refer to:
Arts, entertainment, and media
* ''Layers'' (Kungs album)
* ''Layers'' (Les McCann album)
* ''Layers'' (Royce da 5'9" album)
*"Layers", the title track of Royce da 5'9"'s sixth studio album
*Layer, a female Maveric ...
*
Partition (disambiguation)
*
Strata (disambiguation)
Strata is the plural of stratum (the geological formation); for uses in the singular, see Stratum (disambiguation).
Strata may also refer to:
Media Music
* Strata (band), a Northern California band
* ''Strata'' (Matthew Shipp album), 1998
* ...
*
Stratified epithelial lining (disambiguation) Stratified epithelial lining can refer to:
* Stratified squamous epithelium
* Stratified columnar epithelium
* Stratified cuboidal epithelium
Stratified cuboidal epithelium is a type of epithelial tissue composed of multiple layers of cube-shape ...
*
Stratified sampling
In statistics, stratified sampling is a method of sampling from a population which can be partitioned into subpopulations.
In statistical surveys, when subpopulations within an overall population vary, it could be advantageous to sample each s ...
*
Stratigraphy
Stratigraphy is a branch of geology concerned with the study of rock (geology), rock layers (Stratum, strata) and layering (stratification). It is primarily used in the study of sedimentary rock, sedimentary and layered volcanic rocks.
Stratigrap ...
*
Stratum (disambiguation)
A stratum in geology is a layer of sedimentary rock or sediment. In archaeology, it is a layer of man-produced sediment of a certain age.
Stratum may also refer to:
Science and technology
*Layer or stratum (archaeology): see Stratigraphy (archae ...
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