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Mempelam Bay

Mempelam Bay

Mempelam Bay is located on the northwestern coast of Pulau Langgun, the location of the most famous exposure of Devonian rocks in Peninsular Malaysia.

Mempelam Bay is the location where the type section of the Setul Formation was erected. It comprises of the Ordovician Lower Limestone Member, Early Silurian Lower Detrital Member, Late Silurian Upper Limestone Member and Early to Middle Devonian Upper Detrital Member.

The changes from the Lower Limestone Member to the overlying Lower Detrital Member reflected continous rising of the ancient sea level that allowed the deposition of fine-grained siliceous and cherty rocks overlying the shallower marine limestone and limestone. The Upper Limestone Member was deposited during the subsequent drop of the sea-level.

Gastropod, cephalopod and conodonts are the dominant fossil in the Lower Limestone Member. Trilobite and graptolite dominate the Lower Detrital Member while trilobite, cephalopod , crinoid and trace fossils are the most common fossils in the Upper Limestone Member.

The Upper Detrital Member generally lacks in fossils. The prolonged erosion has resulted in the formation of broad erosion platforms at various ancient sea levels with several beautiful sea-stacks. The deformation on sandstone of the Upper Detrital Member has formed several open anticlines and synclines with some tighter crenulation folds.

Ancient abrasion platform and sea-stacks adorn the coastline at Mempelam Bay.
Golden-coloured mould of gastropod fossil found at Mempelam Bay.
A sandstone clast in the red mudstone of The Singa Formation.
Geosites location map of Kilim Geoforest Park.
(The Cooperative of Kilim Village Community Langkawi Limited)

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