Devonian
Ancient geological period
Devonian refers to a geologic period roughly 420 to 360 million years ago, part of the Paleozoic Era.
Named for Devon, England, where rocks from this period were first studied.
The Devonian is sometimes called the Age of Fishes for the diversity of fish that evolved during it.
As an adjective, Devonian describes rocks, fossils, or life forms from this period: Devonian limestone, Devonian trilobites.
Ancient southern supercontinent
- PangaeaPrehistoric unified landmass
- continentalOf a continent
- marineRelating to the sea
- landmassContinuous area of ground
supercontinent · tropical · equatorial · reef · sedimentary · strata · orogeny
Early complex-life epoch
- SilurianPaleozoic period, mid-range
- CarboniferousCoal-depositing geological period
- MississippianNative of a southern state
- PennsylvanianNative of Keystone State
geological · era · period · epoch · stage · stratigraphy · geochronology · boundary
Extinct segmented marine arthropod
- brachiopodHinged-shell marine invertebrate
- ammoniteExtinct spiral-shelled cephalopod
- coralMarine skeletal formation
- lungfishFish that breathes air
nautiloid · shark · invertebrate · vertebrate
Largest British country
- countyLocal administrative division
- BritishOf the United Kingdom
- CornwallSouthwestern English peninsula county
- ExeterDevon's capital city
Plymouth · Torquay · geology · stratum · outcrop · nomenclature · British Isles
Four-limbed vertebrate animal
- limb developmentFormation of extremities
- vertebrateSpinal column animal
- diversificationExpanding into varied areas
- speciationFormation of distinct species
Gondwana
Ancient southern supercontinent
- PangaeaPrehistoric unified landmass
- continentalOf a continent
- marineRelating to the sea
landmass · supercontinent · tropical · equatorial · reef · sedimentary · strata · orogeny
Paleozoic
Early complex-life epoch
- SilurianPaleozoic period, mid-range
- CarboniferousCoal-depositing geological period
- MississippianNative of a southern state
Pennsylvanian · geological · era · period · epoch · stage · stratigraphy · geochronology · boundary · extinction
trilobite
Extinct segmented marine arthropod
- brachiopodHinged-shell marine invertebrate
- ammoniteExtinct spiral-shelled cephalopod
- coralMarine skeletal formation
lungfish · nautiloid · shark · invertebrate · vertebrate
England
Largest British country
- countyLocal administrative division
- BritishOf the United Kingdom
- CornwallSouthwestern English peninsula county
Exeter · Plymouth · Torquay · geology · stratum · outcrop · nomenclature · British Isles
tetrapod
Four-limbed vertebrate animal
- limb developmentFormation of extremities
- vertebrateSpinal column animal
- diversificationExpanding into varied areas
- geologic historyCambrian, Ordovician, Silurian, Carboniferous, Permian
- geologic timeeons, eon, epochs, era, epoch
- paleontologydinosaurs, fossil, paleontology, fossil record, dinosaur bones
- British geologychalk, flint, limestone, shale, sandstone
- British RegionalGeordie, Brummie, Mancunian, Glaswegian, Yorkshire
- BritonsBrit, British, Englishman, Scotsman, Welshman
DevonianQuaternary
Last 2.6 million years
Anthropocene · Holocene · Pleistocene · Precambrian · Archean