SRMEG-GEOSS Workshop on Geology of Singapore

05 April 2010

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Singapore’s natural deposits are classified under 10 geological formations. In decreasing age, they are outlined with their characteristic rock or sediment types.1. Sajahat Formation: quartzite, argillite2. Gombak norite: gabbro3. Palaeozoic Volcanics: tuff4. Bukit Timah Granite: granite5. Jurong Formation: reddish mudstone, grey fossil-rich mudstone and shale, fossil-rich limestone, siltstone, sandstone, conglomerate6. Fort Canning Boulder Bed: hard red and white sandy silty clay containing many sandstone boulders7. Old Alluvium: dense muddy sand/gravel8. Huat Choe Formation: firm white kaolin clay9. Tekong Formation: loose pebbly sand10. Kallang Formation: soft grey clay, loose brownish muddy sand, loose light grey to white sand, peaty clay.

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