| 
Country:
 | 
USA 
 | 
| 
Province:
 | 
New York, Chautauqua Co. 
 | 
| 
Locality:
 | 
Summerdale, Porter Creek 
 | 
| 
Layer:
 | 
Ellicott Shale | 
| 
Lower Boundary:
 | 
UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
 
 | 
| 
Upper Boundary:
 | 
UD2H--UD2I:(mamilliferum base)   [12,90], 370 million years
 
 | 
| 
Georeference:
 | 
 |