Qijiaoqiao Fm
Period:
Cretaceous
Age Interval:
Late Cretaceous, (29a)
Province:
Anhui
Type Locality and Naming
Heifei Basin, south zone. Shown with age-span on the stratigraphic chart of Xi et al. (2019); but no details given, and not found in older Chinese stratigraphic unit guide. Indicated in Zhang et al. (2012, Acta Geol. Sinica, 86: 1060-1076) as a term used in some published stratigraphic columns for this southern zone of Heifei Basin.
Lithology and Thickness
Xi et al. (2019) imply it is sandstone according to the pattern on their chart.
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Disconformity; next older unit is the Xiaotian Fm.
Upper contact
Cenozoic
Regional extent
GeoJSON
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Fossils
Age
Age Span:
Beginning stage:
Campanian
Fraction up in beginning stage:
0.4
Beginning date (Ma):
79.06
Ending stage:
Maastrichtian
Fraction up in the ending stage:
1.0
Ending date (Ma):
66.04
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