Stratification
WordNet
noun
(1) The placing of seeds in damp sand or sawdust or peat moss in order to preserve them or promote germination
(2) The act or process or arranging persons into classes or social strata
(3) A layered configuration
(4) Forming or depositing in layers
(5) The condition of being arranged in social strata or classes within a group
WiktionaryText
Noun
- the process leading to the formation or deposition of layers, especially of sedimentary rocks
- a layering of musical texture
- the vertical layering of vegetation in a forest