| 
Country:
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Japan 
 | 
| 
Province:
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Akiyoshi,Yamaguchi Pref. 
 | 
| 
Locality:
 | 
Mine City,Isa Quarry,Isa machi, IM63 
 | 
| 
Layer:
 | 
Akiyoshi Lmst., lower, l.Fusulinella b. | 
| 
Lower Boundary:
 | 
Fusulinella base, 309.8 million years
 
 | 
| 
Upper Boundary:
 | 
Diabol./Winsl--Paralego./Eowellerites GZ, 309.5 million years
 
 | 
| 
Georeference:
 | 
 |