Duobaoshan Fm
Period:
Ordovician
Age Interval:
Late Ordovician, (7)
Province:
Heilongjiang
Type Locality and Naming
Type section at Duobaoshan in west side of Luohe River, Nenjiang County, Heilongjiang Province. Named by Tang Kedong, Su Yangzheng, 1966, Acta Geologica Sinica, 46(1): 14–28.
Synonym:
Lithology and Thickness
Volcanic breccia, tuffite and slate, with interbeds of marble
Lithology Pattern:
Volcanic ash
Relationships and Distribution
Lower contact
Regionally, the next older unit is the Tongshan Fm.
Upper contact
Regionally, the next younger unit is the Luohe Fm.
Regional extent
GeoJSON
null
Fossils
Age
Age Span:
Beginning stage:
Sandbian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
458.18
Ending stage:
Katian
Fraction up in the ending stage:
0.4
Ending date (Ma):
449.73
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Geological Formation Names of China (1866-2000); Springer Publ.