<p>The Lakadong Limestone is a late Paleocene carbonate unit within the Lakadong Formation, exposed in the southern fringes of Meghalaya, particularly in east Khasi Hills and Jaintia Hills, northeast India. This carbonate deposit is important for paleoenvironmental studies within the eastern Tethyan realm. Field observation and microfacies study divide the entire succession into two broad parts: dolomitic limestone and fossiliferous limestone. Using a multiproxy approach that integrates sedimentological, paleontological, and geochemical data, six microfacies were identified across a restricted-to-open shallow-marine depositional environment. The microfossil assemblage includes foraminifera such as <i>Miscellanea</i> sp., <i>Ranikothalia</i> sp., <i>Textularia</i> sp., miliolids, and rotaliids, and calcareous algae. The dolomitic limestone exhibits a fine to medium-grained planar texture with euhedral and subhedral rhombs, reflecting low-salinity, low-temperature deposition. Since the dolomitic limestone part exhibits significant chemical modification, it was excluded from further geochemical interpretation. Higher SiO₂ concentration and its positive association with low percentage of Al₂O₃, TiO₂, K₂O, Fe₂O₃, P₂O₅ indicate an influx of terrigenous material during deposition, which is further supported by Ce/Ce* ratio (av. 0.9), (La/Yb)N ratio (0.66){N symbolises PAAS normalised} and Y/Ho ratio (38.38). The inverse correlations of REE with CaO and the positive correlation between Fe₂O₃, Th, Sc, and Y suggest that the REE were derived from the siliciclastic sediment source, rather than sea-water. Sr concentration (357 ppm), lower authigenic U (1.40 ppm), and V/V + Ni, V/Cr, and Ce/Ce* vs Pr/Pr* ratios suggest an oxidising, low-salinity, shallow-marine depositional environment. CIW’ indices indicate moderate to high weathering conditions during deposition.</p>