The Paleobiology Database

ammonites

Jeffersonian age/stage

General information

Lower boundary: after 488.3 Ma (based on Tremadocian)
Upper boundary: before 468.1 Ma (based on Dapingian)
Continent: North America
See collections within this interval
See map of collections within this interval

Key correlations

Period: Ordovician

Contained within

Next intervals

Contains

Bendigonian, Billingen, Blackhillsian, Castlemainian, Chewtonian, Floian, Hunneberg, Latorp, Latorpian, Moridunian, Whitlandian, late Early Ordovician

Shares base with

Cressagian, Datsonian, Deming, Demingian, Early/Lower Ordovician, Gasconadian, Ibexian, Ichangian, Lancefieldian, Lianghekou, Mansian, Migneintian, Oeland, Ordovician, Pakerort, Skullrockian, Stairsian, Tremadoc, Tremadocian, Tulean, Ungurian, Varangu, Warendian, Yichang

Shares top with

Arenigian, Cassinian, Daobaowan, Dapingian, Dawan, Langevoja, Ningkuo, Rangerian, Saka, Vaana, Valhallan, Volkhov, Volkhovian, Yushanian, early Middle Ordovician

Overlaps with

Yapeenian (468.9 to 466.0 Ma)

Whiterockian (471.8 to 457.5 Ma)

Middle Ordovician (471.8 to 460.9 Ma)

Fennian (471.8 to 466.0 Ma)

Valaste (471.8 to 466.0 Ma)

Hunderum (471.8 to 466.0 Ma)

Yangtzi (478.6 to 460.9 Ma)

Arenig (478.6 to 466.0 Ma)

Klabava (478.6 to 466.0 Ma)

Jefferson (488.3 to 468.1 Ma)

Hunjiang (488.3 to 468.1 Ma)

Olentian (501.0 to 484.5 Ma)

Appears in scale

Ross et al. 1982 Ordovician Stages of North America I (1998)