The Paleobiology Database

ammonites

Harland Ordovician of the Eastern USA

Interval	Maximum correlate	Minimum correlate

Gamach	Hirnantian
= Cincinnatian


Richmond	Pusgillian	Rawtheyan
= Cincinnatian


Maysville	Onnian	Pusgillian
= Cincinnatian


Edenian	Marshbrookian	Onnian
= Cincinnatian


Sherman	Soudleyan	Longvillian
= Champlanian


Kirkfield	Harnagian	Soudleyan
= Champlanian


Rockland	Harnagian
= Champlanian


Black River	Costonian
= Champlanian


Chazy	Early/Lower Llandeilo	Late/Upper Llandeilo
= Champlanian


Whiterock	Arenig	Llanvirn
= Champlanian


Cassinian	Arenig
= Ibexian/Canadian


Jefferson	Tremadoc	Arenig
= Ibexian/Canadian


Deming	Tremadoc
= Ibexian/Canadian


Gasconadian	Tremadoc
= Ibexian/Canadian

Authorizer: J. Alroy Enterer: J. Alroy

Continent: Europe Rank of each interval: age/stage

Basis of scale: paleontological

Reference: W. B. Harland et al. 1990

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