Jurong Formation

The Jurong formation is a sedimentary rock formation that covers the southwest portion of the island of Singapore. The formation was laid down in the late Triassic to early or middle Jurassic geologic periods. It consists of dolomite, limestone, mudstone, sandstone, shale, and conglomerates that have been acutely folded and faulted as the result of tectonic plate movement.

References

H. Rahardjo, K. K. Aung, E. C. Leong, and R. B. Rezaur, "Characteristics of residual soils in Singapore as formed by weathering," Engineering Geology, Volume 73, Issues 1-2, May 2004, Pages 157-169 doi:10.1016/j.enggeo.2004.01.002

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