Duonageli Fm
Period:
Carboniferous
Age Interval:
C11 (61), early Tournaisian (middle Early Carboniferous)
Province:
Xizang (Tibet)
Type Locality and Naming
The type section lies from the south slope of Deriangma Mt. to Xila Mt., 6 km northeast of Yunzhug Township, Xianza, Tibet. It was named by Yang Shipu and Fan Yingnian in 1982.
Lithology and Thickness
Limestone. Composed of gray and light-gray moderately thick- to thick-bedded compact limestone, locally with irregular oolitic and edgewise textures; 158 m thick.
Lithology Pattern:
Oolitic limestone
Relationships and Distribution
Lower contact
Conformable contact with underlying Upper Devonian Chaguoluoma Fm
Upper contact
Conformable contact with the overlying Pengga Fm
Regional extent
Distributed around Yunzhug Township of Xianza, Chaguoluoma Mt., Deriangma Mt. and Gyêwa.
GeoJSON
null
Age
early Tournaisian (middle Early Carboniferous)
Age Span:
Beginning stage:
Tournaisian
Fraction up in beginning stage:
0.4
Beginning date (Ma):
354.27
Ending stage:
Tournaisian
Fraction up in the ending stage:
0.0
Ending date (Ma):
359.30
Depositional setting
It is interpreted as Paleo-Tethys neritic sediments
Depositional pattern:
Additional Information
Compiler:
Fan Yingnian