Research / Geoscience / Language
Stratigraphy
The study and ordering of rock bodies in space and time, using their properties, contacts and stratigraphic relationships.
Language and route: English compound of Latin stratum and Greek-derived -graphy. Latin stratum, ‘thing spread out; layer’, combined with Greek-derived -graphy, ‘description, writing’.
Literal gloss: description of layers
The name and its history
No single author securely identified for general English formation · Nineteenth-century compound attested
- What does the word literally mean?
- ‘Description of layers’; a hybrid Latin–Greek formation.
- What did the original author mean?
- It names the systematic study and description of rock layers and their order; its principles preceded the widespread use of the compound word.
- Why was the name needed?
- Geologists needed a shared discipline for mapping and relating rock sequences rather than relying on an isolated local account of each exposure.
- What evidence supported the original concept?
- Superposition, mappable contacts, fossils and subsequent stratigraphic correlation; international guides eventually codified the various criteria.
- How has geology changed the concept?
- Now the umbrella for lithostratigraphy, biostratigraphy, chronostratigraphy and other approaches. It does not imply that identical rock appearance equals identical age.
Further historical context
The modern scientific field predates the literal compound’s widespread appearance; do not infer that the first geologist to map strata coined stratigraphy.
Editorial qualification
Modern discipline and etymological first attestation are separate questions.
Related names
Lithostratigraphy · Biostratigraphy · Lithology · Fossil · Superposition
Sources
- ICS International Stratigraphic Guide, Definitions — Formal definition of stratigraphy
- Online Etymology Dictionary, stratigraphy — Latin-Greek compound and attestation
- Hedberg (1972), International Guide to Stratigraphic Classification — Historical codification of stratigraphic nomenclature