Guancaohu Fm
Period:
Cretaceous
Age Interval:
Early Cretaceous, K1gch, (42b)
Province:
Guangdong
Type Locality and Naming
The name of Guancaohu Formation was given by the No.761 Geological Team of Guangdong in 1959. The type locality is in the Jiexi County. The type section is the Guancaohu section of Jiexi, Guangdong (115º55', 22º38').
Lithology and Thickness
The Guancaohu Formation is composed of volcanic clastic sediments and volcanic rocks, dominating by conglomerate, sandstone, tuffaceous sandstone, tuff, basalt, andesite tuff and rhyolite. Its thickness is over 2000 m.
Lithology Pattern:
Volcanics
Relationships and Distribution
Lower contact
In eastern Guangdong, it unconformably contacts with the underlying Nanshancun Fm.
Upper contact
It unconformably contacts with the overlying Heshui Fm.
Regional extent
This formation well occurs in eastern Guangdong, and is also distributed in some area of western Guangdong.
GeoJSON
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Fossils
None listed
Age
Not given; for graphic purposes put as mid-Early Cret.
Age Span:
Beginning stage:
Hauterivian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
132.60
Ending stage:
Barremian
Fraction up in the ending stage:
1.0
Ending date (Ma):
121.40
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Wan Xiaoqiao