Oligocene
adjective
uk/ˌɒl.ɪ.ɡə.siːn/us/ˌɑː.lɪ.ɡoʊ.siːn/from or referring to theperiodoftimebetween about 34 and 23 millionyearsago:
Fossils of anespeciallyricharrayof Oligocenemammalshave beenunearthedhere.
Fossilizedleavesmayprovideinformationonelevationchangessince the end of the Oligoceneperiod.
- Wehuntedmarinefossilsfrom the Oligocene and Eoceneeras.
- Eventually, by Oligocenetime, about 30 millionyearsago,tectonicforcesreversedandextensionof thecrustbegan.
- Fewfossilsfrom thecriticalOligoceneepochareknown, andevenfewer aredescribed.
Geology - general words
- Anthropocene
- aquifer
- auriferous
- biozone
- Cambrian
- carboniferous
- cementation
- Cretaceous
- Holocene
- hoodoo
- interbed
- Jurassic
- karst
- plate tectonics
- pyroclastic
- Quaternary
- sedimentation
- selenologist
- tectonic
- the rock cycle
You can also find related words, phrases, and synonyms in the topics:
Prehistory
Specific periods of time
Oligocene
noun[S]
uk/ˌɒl.ɪ.ɡə.siːn/us/ˌɑː.lɪ.ɡoʊ.siːn/the Oligocene
theperiodoftimebetween about 34 and 23 millionyearsago:
The Oligocene was aperiodofglobalcooling,volcaniceruptions, andseismicdisturbance.
Thespecimenis from ayoungfemalethatlivedin the early Oligocene.
- It isdividedinto fiveepochs: the Palaeocene, Eocene, Oligocene, Miocene, andPliocene.
- The hominoidprimatesappearto haveemergedduring the Oligocene at least 25 millionyearsago.
- Theseaquaticmammalswereapparentlymoreabundantfrom the Oligocene to thePliocenethan they are now.
Geology - general words
- Anthropocene
- aquifer
- auriferous
- biozone
- Cambrian
- carboniferous
- cementation
- Cretaceous
- Holocene
- hoodoo
- interbed
- Jurassic
- karst
- plate tectonics
- pyroclastic
- Quaternary
- sedimentation
- selenologist
- tectonic
- the rock cycle
You can also find related words, phrases, and synonyms in the topics:
Prehistory
Specific periods of time