Carboniferous
Paleozoic period between Devonian and Permian.
Language and route: English geological term formed from Latin elements. From Latin carbō, ‘coal, charcoal’, and adjectival -ferous, ‘bearing’.
Literal gloss: coal-bearing
The name and its history
Conybeare & Phillips (major systematisation) · 1822; earlier adjectival uses
- What does the word literally mean?
- The term refers to coal-bearing formations conspicuous in British stratigraphy, not a guarantee of coal everywhere within this global period.
- What did the original author mean?
- The word described conspicuous coal-bearing strata in Britain.
- Why was the name needed?
- British workers wanted to group coal measures and associated limestones and sandstones outside Wernerian categories.
- What evidence supported the original concept?
- Coal deposits, field superposition and characteristic rocks motivated the name, while the contemporary authors also argued for the theory-neutral name Medial.
- How has geology changed the concept?
- The worldwide period includes marine and non-coal facies; coal is not ubiquitous and its subdivisions differ in regional systems.
Further historical context
W. D. Conybeare and William Phillips’s Outlines of the Geology of England and Wales (1822) explicitly grouped coal measures with underlying limestones and sandstones as a Medial or Carboniferous Order, rejecting some earlier Wernerian grouping conventions.
The Carboniferous was not first invented ex nihilo in 1822: the adjective had earlier geological uses, and its systematic scope changed. British and North American practice still differs over the rank of the Mississippian and Pennsylvanian subdivisions.
Editorial qualification
Do not claim unequivocally that 1822 was the first use of the word.
Related names
Devonian · Permian · Paleozoic · Mississippian · Pennsylvanian · Tournaisian · Visean · Serpukhovian · Bashkirian · Moscovian · Kasimovian · Gzhelian · Stratigraphy · Superposition · Facies
Sources
- ICS International Chronostratigraphic Chart, 2026/06 — Current name, rank and numerical boundaries
- Conybeare & Phillips (1822), Outlines of the Geology of England and Wales — Digitised early classification; Medial or Carboniferous Order
- Wilmarth (1925), USGS Bulletin 769: original definitions — Historical compilation reproducing original terminology