Baidaban Fm
Period:
Cretaceous
Age Interval:
Early Cretaceous, (29a)
Province:
Anhui
Type Locality and Naming
Heifei Basin, south zone. Baidaban, Jinzhai County, Anhui. Anhui Regional Geological Survey Team, 1974, Explanatory Text for 1:200 000 Scale Geological Map: Lu'an, Yuexi Sheet.
Lithology and Thickness
Quartz andesite and quartz trachyte.
Lithology Pattern:
Lava
Relationships and Distribution
Lower contact
Xi et al. (2019) imply the next older unit is the Maotanchang Fm.
Upper contact
Xi et al. (2019) imply the next older unit is the Heishidu Fm.
Regional extent
GeoJSON
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Fossils
Age
Age Span:
Beginning stage:
Hauterivian
Fraction up in beginning stage:
0.8
Beginning date (Ma):
127.72
Ending stage:
Aptian
Fraction up in the ending stage:
0.2
Ending date (Ma):
119.76
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Xi, D.P., Wan, X.Q, Li, G.B., Li, G. 2019. Cretaceous integrative stratigraphy and timescale of China. Science China Earth Sciences, 61, https://doi.org/10.1007/s11430-017-9262-y