Eocene

E792421

geologic epoch

The Eocene was a geologic epoch, roughly 56 to 34 million years ago, marked by warm global climates and significant diversification of early mammals and modern plant groups.

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Observed surface forms (2)

Surface form	Occurrences
Eocene Epoch	2
Eocene epoch	1

Statements (49)

Predicate	Object
instanceOf	geologic epoch ⓘ
associatedWith	active plate tectonics and mountain building ⓘ collision of India with Asia ⓘ continued opening of the North Atlantic Ocean ⓘ development of many modern plant families ⓘ diversification of bats ⓘ diversification of early horses ⓘ diversification of early whales (archaeocetes) ⓘ diversification of rodents ⓘ early stages of Himalayan uplift ⓘ expansion of angiosperm-dominated forests ⓘ formation of the Drake Passage region ⓘ high sea levels ⓘ initial diversification of many modern mammal orders ⓘ radiation of early primates ⓘ widespread peat and coal formation in some regions ⓘ
characterizedBy	absence of large continental ice sheets for most of epoch ⓘ expansion of modern plant groups ⓘ greenhouse climate state ⓘ high atmospheric CO2 levels ⓘ significant diversification of early mammals ⓘ warm global climates ⓘ warm high-latitude climates ⓘ widespread tropical and subtropical forests ⓘ
chronostratigraphicUnit	Eocene Series NERFINISHED ⓘ
endTime	Priabonian age close ⓘ approximately 34 million years ago ⓘ
etymology	from Greek eos meaning dawn ⓘ
followedBy	Oligocene NERFINISHED ⓘ
follows	Paleocene ⓘ
geochronologicUnit	Eocene Epoch NERFINISHED ⓘ
hasStratotypeRegion	northwestern Europe ⓘ
hasSubdivision	Bartonian NERFINISHED ⓘ Lutetian NERFINISHED ⓘ Priabonian NERFINISHED ⓘ Ypresian NERFINISHED ⓘ
includesEvent	Early Eocene Climatic Optimum NERFINISHED ⓘ Eocene–Oligocene transition cooling NERFINISHED ⓘ Middle Eocene Climatic Optimum NERFINISHED ⓘ Paleocene–Eocene Thermal Maximum recovery phase NERFINISHED ⓘ
namedBy	Charles Lyell NERFINISHED ⓘ
partOf	Paleogene Period NERFINISHED ⓘ
precededBy	Paleocene NERFINISHED ⓘ
precedes	Oligocene NERFINISHED ⓘ
startTime	Ypresian age onset ⓘ approximately 56 million years ago ⓘ
subdivisionOf	Cenozoic Era NERFINISHED ⓘ Phanerozoic Eon NERFINISHED ⓘ
usedIn	International Commission on Stratigraphy timescale NERFINISHED ⓘ

Referenced by (10)

Full triples — surface form annotated when it differs from this entity's canonical label.

Xiphodontidae → firstAppearance → Eocene ⓘ

Oromerycidae → temporalRange → Eocene ⓘ

Oromerycidae → geologicalEpoch → Eocene ⓘ

Absaroka Range → geologicAge → Eocene ⓘ

Oligocene Epoch → follows → Eocene ⓘ

this entity surface form: Eocene Epoch

Equidae → evolutionaryOrigin → Eocene ⓘ

this entity surface form: Eocene epoch

Tapiridae → firstAppearance → Eocene ⓘ

Paleogene climatic optimums → occursIn → Eocene ⓘ

this entity surface form: Eocene Epoch

Bryce Amphitheater → geologicalAge → Eocene ⓘ

Proboscidea → majorRadiation → Eocene ⓘ