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Tandodani Formation

Tandodani Fm


Period: 
Triassic

Age Interval: 
Upper Triassic (Carnian), (19b)


Province: 
Hida Gaien Belt- Fukuji-Takayama area

Type Locality and Naming

Fukuji—Takayama area (a) is the type locality of this belt (Tsukada et al., 2004).

Synonym:


Lithology and Thickness

mainly felsic tuffaceous rocks

[Figure 1: Stratigraphic relationship among the rocks of the Hida Gaien Belt (after M. Ehiro et al., 2016)]

[Figure 2: A columnar section of the Muribu and Fukuji successions showing their major lithologies and characteristic layers and blocks (after M. Ehiro et al., 2016)]


Lithology Pattern: 
Volcanic_ash


Relationships and Distribution

Lower contact

It is in fault contact with the Arakigawa Fm (Tsukada et al., 1997; Tsukada & Niwa 2005). Regionally, the schematic strat column indicates the next older unit as Funatsu Granite Fm.

Upper contact

Regionally, the schematic strat column indicates the next younger unit as Moributype Gr

Regional extent

Hida Gaien Belt- Fukuji-Takayama area (a)


GeoJSON

null

Fossils

The Tandodani Formation yields Camian—Norian conodonts


Age 

Shown as Upper Triassic, hence placed Base of Carnian

Age Span: 

    Beginning stage: 
Carnian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
237.00

    Ending stage: 
Carnian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
227.30

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.