ammonites

Harland Devonian of Eastern North America

 Interval Maximum correlate   Minimum correlate
Conewango Famennian

= Chautauquan
Conneaut Famennian

= Chautauquan
Canadaway Famennian

= Chautauquan
West Falls Frasnian

= Senecan
Sonyea Frasnian

= Senecan
Genesee Givetian Frasnian

= Senecan
Taghanic Givetian

= Erian/Senecan
Tioughnioga Givetian

= Erian
Cazenovia Eifelian Givetian

= Erian
Southwood Eifelian

= Ulsterian
Sawkill Emsian

= Ulsterian
Deer Park Emsian

= Ulsterian
Helderberg Lochkovian Emsian

= Ulsterian

Authorizer: J. Alroy   Enterer: J. Alroy

Continent: North America   Rank of each interval: age/stage

Basis of scale: paleontological  

Reference: W. B. Harland et al. 1990

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