Yuchiba Fm
Period:
Devonian
Age Interval:
D22 (41a), Eifelian (Middle Devonian)
Province:
Gansu
Type Locality and Naming
Type section at Yuchiba in Lixian County, Gansu. It was named by Cao Xuanduo et al, 1994.
Lithology and Thickness
Clayey sandstone. Gray-green sandy slate and sandstone, interlayered with limestone.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
It conformably overlies the Leijiaba Fm.
Upper contact
It conformably underlies the Pingtou Fm.
Regional extent
GeoJSON
null
Fossils
Age
Eifelian (Middle Devonian)
Age Span:
Beginning stage:
Eifelian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
389.80
Ending stage:
Eifelian
Fraction up in the ending stage:
1.0
Ending date (Ma):
385.30
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Taken from Chinese lexicon entry; translated by Anqing Chen