Exposed ancient hydrocarbon reservoir rocks still showing signs of seepage and oil odour. It is the only known locality where such reservoir rocks can be observed at surface level in Labuan.
At this geoside, you can observe an exposed oil-bearing reservoir rock that still shows traces of hydrocarbons and even a faint smell of oil seeping out. This is the only locality where visitors can see and touch an oil reservoir rock that today normally lies several thousand feet beneath the seabed around Labuan.
The site forms part of the Belait Formation dated 23-5 million years old. Its uniqueness lies in the oil-saturated sandstone layers that allow oil to seep to the surface through pores between the sand grains. Over long periods these seepages have left brown to yellowish stains on the rock surface. Such a phenomenon is rare in Malaysia because most oil reservoirs occur thousands of feet below the offshore seabed.
There are also coal layers about 1-2 metres thick at three nearby locations, occurring between fine-grained siltstone and mudstone beds. These coal seams indicate deposition in calmer environments such as swamps or floodplains.
Conglomerate beds and well-preserved geological structures such as asymmetric ripple marks and cross-bedding are also exposed. These features are clues to the depositional environment of the rocks at this site, interpreted as having formed in ancient terrestrial and shallow-marine settings.
River channel deposits from approximately 15 million years ago, part of the lower Belait Formation. Fresh outcrops exhibit near-horizontal thick sandstone layers. A scenic and diverse coastal landscape with alternating sandy and rocky shorelines, featuring sea caves and arches in several locations.
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Thickly bedded sandstone layers representing ancient tidal-influenced river channels. Abundant shallow marine trace fossils such as Ophiomorpha isp. and Teichichnus isp. are visible. Exceptionally well-developed tafoni (honeycomb weathering structures) formed by salt spray from the sea, creating intricate voids on coastal rock surfaces.
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Exposing high-quality, fresh rock surfaces showcasing large-scale cross-bedding with embedded coal fragments, a unique feature not recorded elsewhere in Malaysia. Characterised by a broad tidal flat displaying current and wave ripple structures at low tide, with visible Belait Formation strata extending offshore toward Pulau Ular, and a natural sea arch sculpted by wave erosion.
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