Hakoneyama Fm
Period:
Cretaceous
Age Interval:
Early Cretaceous (Valanginian), (8k)
Province:
South Kitakami Belt-Eastern Sub-belt
Type Locality and Naming
the Ofunato Sub-belt
Synonym:
Lithology and Thickness
It consists of volcanic conglomerate.
Lithology Pattern:
Aus conglomerate
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates this is the older unit
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Kobosoura Fm
Regional extent
Kanagawa & Ando (I983) interpreted the Hakoneyama Fm which consists of volcanic conglomerate, as a southern extension of the Upper Triassic Myojinmae Fm.
GeoJSON
null
Fossils
Age
Age Span:
Beginning stage:
Valanginian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
135.15
Ending stage:
Valanginian
Fraction up in the ending stage:
1.0
Ending date (Ma):
132.60
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Moreno, T., WALLIS, S., Kojima, T. & Gibbons, W. (Eds) 2016. The Geology of Japan. Geological Society. London. 1-24.