Jixi Gr
Period:
Cretaceous
Age Interval:
Early Cretaceous, (22) K1jxG
Province:
Heilongjiang
Type Locality and Naming
E. Heilongjiang – Sanjiang. The strata was studied by Yu Renji (1950) and called as the Jixi System. Chen Guangya (1959) named it as the Jixi Group.
Lithology and Thickness
The Jixi Group is a group of coal-bearing strata. The formation consists of the upward succession of the Didao Fm, Chengzihe Fm, and Muling Fm.
Lithology Pattern:
Coal
Relationships and Distribution
Lower contact
It overlies the base rocks unconformably.
Upper contact
Regional extent
The Jixi Group is distributed in the Jixi and Boli areas in eastern Heilongjiang.
GeoJSON
null
Fossils
None listed
Age
This group was referred to the Late Jurassic to Early Cretaceous by the “Stratigraphy (Lithostratigraphy) of Heilongjiang Province (1997)”. Based on recent study, the present lexicon suggests the age of the Longzhaogou Gr is Early Cretaceous.
Age Span:
Beginning stage:
Barremian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
126.50
Ending stage:
Albian
Fraction up in the ending stage:
0.2
Ending date (Ma):
110.66
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Wan Xiaoqiao