Xiaojingou Fm
Period:
Ordovician
Age Interval:
Late Ordovician, (8a)
Province:
Heilongjiang
Type Locality and Naming
Type section at Xiaojingou in Shangzhi City, Heilongjiang Province. Named by Zhang Hairi, Pu Quansheng, 1987, First discovery of Middle Ordovician strata in eastern Heilongjiang, Journal of Stratigraphy, 11(4): 312–313. A lower formation in the Shangzhi Gr (sum of Baoquan Fm, Xiaojingou Fm and DaqingSongliao Fm).
Synonym:
Lithology and Thickness
Alternating beds of purple, grayish white fine-grained sandstone and siltstone, with interbeds of marble; marble and siltstone with interbeds of lava.
Lithology Pattern:
Fine-grained sandstone
Relationships and Distribution
Lower contact
Upper contact
Regionally, the next younger unit is the DaqingSongliao Fm
Regional extent
GeoJSON
null
Fossils
Age
Age Span:
Beginning stage:
Katian
Fraction up in beginning stage:
0.45
Beginning date (Ma):
449.36
Ending stage:
Katian
Fraction up in the ending stage:
0.7
Ending date (Ma):
447.47
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Geological Formation Names of China (1866-2000); Springer Publ.