Wanderlust World Wanderlust World Peninsular Malaysia's geology is dominated by sedimentary formations, particularly in the northwest and central regions. The three most abundant sedimentary rocks, in order:
Composition: Sand-sized grains (0.0625-2 mm), predominantly quartz, cemented by silica, calcite, or iron oxides.
Formation: Fluvial (river), deltaic, shallow marine, and aeolian (wind) deposition. Major units: Mersing Formation (Jurassic-Cretaceous), Tembeling Group (Triassic-Jurassic), Kenyah Formation (Cretaceous).
Distribution: Widespread — Titiwangsa Range foothills, Pahang/Terengganu basins, Johor sedimentary basins.
Uses: Construction aggregate, dimension stone, silica sand for glass/ceramics, reservoir rock for groundwater/hydrocarbons.
Composition: Calcium carbonate (CaCO₃), primarily calcite; biogenic (coral, foraminifera, mollusks) or chemical precipitate.
Formation: Shallow tropical marine platforms, reefs, lagoons. Major units: Kinta Limestone (Permian), Setul Formation (Ordovician-Silurian), Kodiang Formation (Permian).
Distribution: Northwest (Perlis, Kedah, Perak — Kinta Valley), Kelantan, Pahang. Forms dramatic karst towers (mogotes).
Uses: Cement production (major industry in Perak), lime, construction aggregate, marble (metamorphosed), industrial filler, karst tourism (Batu Caves, Gunung Mulu).
Composition: Clay-sized particles (<0.004 mm), clay minerals (kaolinite, illite, smectite), often fissile.
Formation: Low-energy deposition — deep marine, lacustrine, floodplain, deltaic. Major units: Kepayang Formation (Permian), Gua Musang Formation (Cretaceous), Telisa Formation (Miocene).
Distribution: Interbedded with sandstone/limestone in sedimentary basins — Terengganu, Pahang, Johor, offshore.
Uses: Brick/tile/ceramic raw material (clay), seal rock for hydrocarbons, road base, landfill liner.
Peninsular Malaysia's sedimentary rocks occupy the Western Belt (Phuket-Slate, Mersing, Tembeling) and Central Belt (Kepayang, Gua Musang), bounded by the Bentong-Raub Suture Zone (tectonic boundary). The Eastern Belt is predominantly metamorphic/igneous.