What does stratigraphy mean?
Stratigraphy is the study of layers of rock, soil, sediment, or archaeological deposits and the relationships between them. By examining the order, composition, and physical characteristics of these layers, researchers can reconstruct geological history, establish the relative or absolute age of deposits, and understand how environments changed over time. In geology, stratigraphy helps reconstruct the development of landscapes and sedimentary basins; in archaeology, it is central to excavation, where the sequence of layers can reveal the order in which objects, structures, and human activities appeared. The word also refers to the stratigraphic arrangement of deposits itself, as in the stratigraphy of a particular formation. Although it is a specialized term, the concept is broadly familiar from the idea that geological and archaeological history can be read like a layered record. Stratigraphy is therefore valuable wherever the sequence of layers provides evidence about past events.
nounThe branch of geology concerned with the study of rock layers, or strata, and their spatial and chronological relationships. By extension, it refers to the arrangement and sequence of layered deposits in a particular region.
- The branch of geology that studies rock layers and their spatial and chronological relationships.
- The arrangement, sequence, and chronological succession of layers or deposits in a particular area.
- The method of interpreting an archaeological site by analyzing the order of its layers and artifacts.
"The stratigraphy of the cliffs revealed a sequence of marine and terrestrial deposits extending back millions of years."
"The stratigraphy of the basin was reconstructed from cores taken from several drilling sites."
"By studying the stratigraphy of the excavation, archaeologists established the order in which the buildings were constructed."
The plural is grammatically correct but uncommon in general writing; plural forms are more likely in technical or academic contexts.
"The researchers compared stratigraphies from several sites along the coast."
Stratigraphy turns a cliff face or excavation pit into a timeline, letting researchers read the history of an ancient landscape layer by layer.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does stratigraphy come from?
Stratigraphy was formed in scientific English from the Latin word stratum, meaning “layer,” together with the Greek-derived suffix -graphy, meaning “writing” or “description.” The Latin root itself derives from sternere, “to spread or lay out,” reflecting the original sense of a layer spread over a surface. Related English words include stratum, stratify, stratosphere, and substratum.
Related word forms
How stratigraphy is actually used
Stratigraphy is chiefly a formal scientific term associated with geology, archaeology, and related fields. It is commonly used in technical and academic writing rather than everyday conversation, and its plural form is relatively uncommon.
Easily confused with stratigraphy
Stratigraphy is the scientific study of layered deposits, whereas a stratagem is a carefully devised plan or tactic.