Phu Thuy Chau Fm
Period:
Paleogene
Age Interval:
Oligocene, (6)
Province:
Vietnam Offshore North
Type Locality and Naming
Slope (-5 to -25 m depth) of the Bach Long Vi island (Pham Quang Trung and Nguyen Dich Dy, 1999).
Lithology and Thickness
According to the drilling results, it is 45-50 m of black-grey shale, siltstone and sandstone with veins of black coal; grading upwards into ash-grey siltstone with some interbeds of sandstone containing possibly oil-generating organic matter and thin coal lenses.
Lithology Pattern:
Sandy claystone
Relationships and Distribution
Lower contact
Unknown
Upper contact
Unconformable below the Bach Long Vi Fm
Regional extent
Bach Long Vi island and within borehole 107-TPA-1X.
GeoJSON
null
Fossils
Spores and pollen of Oligocene age
Age
Oligocene
Age Span:
Beginning stage:
Rupelian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
33.90
Ending stage:
Chattian
Fraction up in the ending stage:
1.0
Ending date (Ma):
23.04
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Tran Van Tri and Vu Khuc (Editors; Geology and Earth Resources of Viet Nam, General Dept. of Geology and Minerals of Viet Nam; completed in Dec., 2011), with additional details from Tong-Dzuy Thanh and Vu Khuc (Editors; Stratigraphic Units of Viet Nam, 2nd edition; 2011; English edited by A. Boucot).