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{{User sandbox}}
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{{Graphical timeline
|title=Geological Timeline of Singapore
|align=right
|width=20
|from=-{{period start|Phanerozoic}}
|to={{period end|Phanerozoic}}

|period1=Phanerozoic
|period2=Paleozoic
|period3=Mesozoic
|period4=Cenozoic
|period5=Cambrian
|period6=Ordovician
|period7=Silurian
|period8=Devonian
|period9=Carboniferous
|period10=Permian
|period11=Triassic
|period12=Jurassic
|period13=Cretaceous
|period14=Paleogene
|period15=Neogene
|period16=Quaternary

|period1-right=0.3
|period2-left=0.3
|period2-right=0.55
|period3-left=0.3
|period3-right=0.55
|period4-left=0.3
|period4-right=0.55
|period5-left=0.55
|period6-left=0.55
|period7-left=0.55
|period8-left=0.55
|period9-left=0.55
|period10-left=0.55
|period11-left=0.55
|period12-left=0.55
|period13-left=0.55
|period14-left=0.55
|period15-left=0.55
|period16-left=0.55

|bar1-from=-500
|bar1-to=-450
|bar1-left=0.94
|bar1-colour=#a74141
|note1=Sajahat Formation
|note1-at=-475
|bar2-from=-450
|bar2-to=-360
|bar2-left=0.94
|bar2-colour=#a78241
|note2=Gombak Norite
|note2-at=-405
|bar3-from=-360
|bar3-to=-280
|bar3-left=0.94
|bar3-colour=#9aa741
|note3=Paleozoic Volcanics
|note3-at=-320
|bar4-from=-240
|bar4-to=-200
|bar4-left=0.94
|bar4-colour=#49a741
|note4=Bukit Timah Granite
|note4-at=-220
|bar5-from=-230
|bar5-to=-190
|bar5-left=0.97
|bar5-colour=#4174a7
|note5=Jurong Formation
|note5-at=-210
|bar6-from=-0.7
|bar6-to=-0.001
|bar6-left=0.94
|bar6-colour=#8941a7
|note6=Kallang Formation, Tekong Formation, Huat Choe Formation, Old Alluvium
|note6-at=-0.5

|caption=Caption
}}

{| class="wikitable" style="width:800px"
|+ '''Summary of the geological succession in Singapore'''
|-
! Formation !! Member !! Temporal range !! Description
|- style="background: #00AA66"
| rowspan="5" | '''Kallang Formation''' || '''Littoral Member''' || Present? || Well sorted unconsolidated beach quartz-sand with some laterite, shell and sandstone fragments. Iron-cemented beach rock also exists.
|- style="background: #00BB66"
| '''Reef Member''' || Present? || Coral, unconsolidated calcareous sand, some quartz, iron-cemented sand.
|- style="background: #00CC66"
| '''Transitional Member''' || Present? || Unconsolidated dark mud, muddy sand or sand with peaty layers.
|- style="background: #00DD66"
| '''Alluvial Member''' || Early Holocene to Present? || Alluvial pebble beds, sands, muddy sands clays and peat.
|- style="background: #00EE66"
| '''Marine Member''' || Late Pleistocene to Present? || Mainly unconsolidated blue-grey clayey mud with peat and sand horizons.
|- style="background: #00FF66"
| '''Tekong Formation''' || || Early Holocene || Unconsolidated sand with some cobbles.
|- style="background: #99FF66"
| '''Huat Choe Formation''' || || Early Pleistocene || White kaolinite-rich clay and occasional quartz gravel.
|- style="background: #99EE66"
| '''Old Alluvium''' || || Early Pleistocene || Loose quartz-feldspar sand and gravel with occasional weak sandstone and conglomerate.
|- style="background: #99DD66"
| rowspan="7" | '''Jurong Formation''' || '''Ayer Chawan Facies''' || Upper Triassic to Lower Jurassic || Well bedded, mainly black sandstones and mudrocks; red conglomerates, basic lava, and volcanic ash are also included.
|- style="background: #99CC66"
| '''Queenstown Facies''' || Upper Triassic to Lower Jurassic || Red to purple mudrocks, sandstones and occasional conglomerates; some volcanic ash also occurs.
|- style="background: #99BB66"
| '''St John Facies''' || Upper Triassic to Lower Jurassic || Muddy sandstones with carbonaceous laminations.
|- style="background: #99AA66"
| '''Tengah Facies''' || Upper Triassic to Lower Jurassic || Muddy sandstones with grits and conglomerates. Poorly cemented.
|- style="background: #999966"
| '''Jong Facies''' || Upper Triassic || Well cemented conglomerate and sandstones and occasional mudrocks and basic lavas.
|- style="background: #998866"
| '''Murai Schist''' || Upper Triassic || Mudrock cleaved and sheared by dynamic metamorphism on thrust faults.
|- style="background: #997766"
| '''Rimau Facies''' || Upper Triassic || Well cemented quartz sandstone to quartz conglomerate.
|- style="background: #996666"
| '''Dyke Rocks''' || || Middle Triassic || Acid (older) and basic (younger) dykes intruded into all older rocks.
|- style="background: #995566"
| '''Bukit Timah Granite''' || || Lower to Middle Triassic || Mainly acid igneous rocks, but with some less acid forms due to mixing of the granite and Gombak Intrusives e.g. a 'hybrid' granodiorite is recognised.
|- style="background: #994466"
| '''Palaeozoic Volcanics''' || || Upper Palaeozoic || Coarse and fine grained pyroclastic rocks. Mainly on offshore islands.
|- style="background: #993366"
| '''Gombak Intrusives''' || || Lower Palaeozoic || Basic igneous rocks of mainly noritic and gabbroic composition. Now much altered by later intrusion.
|- style="background: #992266"
| '''Sajahat Formation''' || || Lower Palaeozoic || Hard quartzite, sandstone and mudrocks.
|}

{{Asia topic |prefix=Geology of}}