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Binh Son Formation
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Binh Son Fm base reconstruction

Binh Son Fm

Period: 
Jurassic

Age Interval: 
Early and Middle Jurassic (J1-2 bs), (22)


Province: 
Middle Trung Bo

Type Locality and Naming

Kon Tum uplift in An Khe area, Qiang Ngai Province. Holosỉratotype - railway talus at the Binh Son Station (Quang Ngai Province) from milestone 908.8 to 912 km (x = 15°16’; y = 108°43’). Bui Phu My et al. 1999.

Synonym: - Hệ tầng Birth Sơn: Bùi Phủ Mỹ el al. 1999; Vũ Khúc et al. 2000, - Điệp Thọ \ãm (part.): Trần Đức Lương, Nguyễn Xuân Bao eí al. 1989. - Hệ tầng Đăk Rium: Nguyễn Văn Trang et al.-1995.


Lithology and Thickness

Holostratotype section has thickness of about 415 m including: (1) 316 m of a basal conglomerate interbedded with reddish sandy gritstone and medium-grained sandstone. (2) 100 m of greenish-grey fine sandstone and red-brown siltstone with interbeds of black-grey claystone with leaf imprints and silicified wood.


Lithology Pattern: 
Coarse-grained sandstone


Relationships and Distribution

Lower contact

Unconformable upon Precambrian metamorphic rocks in type area. Regionally, there is the middle Triassic volcanics of the Mang Yang Fm.

Upper contact

Upper boundary not yet observed. Regionally, the next younger unit is the late Miocene Song Ba Fm

Regional extent

Restricted distribution in the Binh Son District and Height 82 at Phu Hau (Qiang Ngai Province)


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[109.08,15.46],[109.35,15.11],[109.23,14.99],[108.67,15.02],[108.57,15.04],[108.55,15.2],[108.77,15.37],[109.08,15.46],[107.65,15.93]]]]}}

Fossils


Age 

Assigned to Early to Middle Jurassic

Age Span: 

    Beginning stage: 
Hettangian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
201.36

    Ending stage: 
Callovian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
161.53

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).