Ngoe Hien Fm

Period:

Neogene

Age Interval:

early Miocene (N₁¹, nh) (30)

Province:
Vietnam Offshore south

Type Locality and Naming

Malay Basin. The type section is located borehole Ngoe Hien (GK.46-NH-IX), at depths 1750 to 2526 m (N = 7°08’; E = 104°03>). It was named by Đỗ Bạt 2002

Synonym: Hệ tàng Kim Long: Dỗ Bat 2002.

Lithology and Thickness

Claystone in the lower part gradually grading upwards into claystone interbedded with sandstone and some brown coal seams. The thickness of the formation in this borehole is 776 m.

Lithology Pattern:

Claystone

Relationships and Distribution

Lower contact

Unconformably upon the Kim Long Fm

Upper contact

Conformably under the Dam Doi Fm

Regional extent

Malay Basin

GeoJSON

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Fossils

Magnastriatites howardi - Echiperiporites estaela Assemblage; Magnastriatites howardi, Echiperiporites estaela, Verrucatosporites, Barringtonia, Calamus, FI. trilobata, FI. levipoli, FI. semilobala, Retimonocolpites, Pinus and Rhizophora, some dinoflagellates, and Pediastrum, Acrostichum etc.

Age

Early Miocene.

Age Span:

Beginning stage:

Aquitanian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

23.04

Ending stage:

Burdigalian

Fraction up in the ending stage:

1.0

Ending date (Ma):

15.99

Depositional setting

It is interpreted as a marshy, coastal deltaic environment.

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, 2^nd edition; 2011; English edited by A. Boucot).