Tenjong Dendang Formation

Tenjong Dendang Formation
Stratigraphic range: Hirnantian ~
Map of Langkawi, the formation is found on the island in the northeast; Langgan
Type	Formation
Lithology
Primary	Limestone
Other	Shale
Location
Coordinates	6.4°N 99.9°E / 6.4; 99.9
Approximate paleocoordinates	23.7°N 133.0°E / 23.7; 133.0
Region	Langgan, Kuah, Langkawi
Country	Malaysia
Type section
Named for	Tanjong Dendang point
Tenjong Dendang Formation (Malaysia) Tenjong Dendang Formation (Kedah)

The Tenjong Dendang Formation is a geologic formation in Malaysia. The band of graptolite- and trilobite-bearing shales interbedded in limestones preserves graptolite, brachiopod and trilobite fossils dating back to the Hirnantian stage of the Late Ordovician period. The sediments were deposited during the Late Ordovician glaciation.

Fossil content

The following fossils were reported from the formation:

Trilobites

• Mucronaspis mucronata
• ?Stenopareia sp.

Hyolitha

• Hyolithida indet.

Strophomenata

• Plectambonitoidea indet.

Gastropods

• Lophospira sp.
• ?Megalomphala sp.

Pterobranchia

• Climacograptus sp.

See also

• Soom Shale, Hirnantian fossiliferous formation of South Africa
• Tufs et calcaires de Rosan, Hirnantian fossiliferous formation of France
• Cancañiri Formation, Hirnantian fossiliferous formation of Bolivia

References

Bibliography

• Kobayashi, T.; Jones, C. R.; Hamada, T. (1964), "On the Lower Silurian shelly fauna in the Langkawi Islands, Northwest Malaya", Japanese Journal of Geology and Geography, 35: 73–80