This study presents new sedimentological and geochemical insights into the Quaternary travertine deposits of Kurkur Oasis in Egypt's Western Desert. Lithofacies analysis identified a suite of distinctive features, including abiotic crystalline forms and microbial structures such as fan/ray crystals, feather crystal shrubs, bacterial shrubs, foam rocks, microbial mats, and calcite rafts. These facies reflect rapid calcium carbonate precipitation influenced by both inorganic processes and microbial activity. Stable isotope analyses (delta 13C:-3.3 %o to +0.67 %o; delta 18O:-12.4 %o to-7.5 %o) indicate that CO2 involved in travertine formation originated primarily from two sources: (1) groundwater interacting with Paleocene marine limestones and (2) meteoric water enriched with atmospheric CO2. Estimated depositional temperatures range from 13 degrees C to 38 degrees C, suggesting precipitation occurred under fluctuating hydrological and thermal conditions. Elemental correlations involving Sr, Br, and rare earth elements (REEs) with CaO across temperature gradients reveal a progression from cooler, freshwater-dominated settings to warmer, geothermal environments. Importantly, this study documents, for the first time, soft-sediment deformation structures within the Kurkur travertines-features interpreted as evidence of tectonic influence, potentially linked to paleoseismic activity. The integration of geochemical, isotopic, and structural evidence supports the presence of both meteogene and thermogene travertine types in the Kurkur Oasis. These findings contribute to a broader understanding of travertine deposition in arid regions and enhance interpretations of paleohydrological and tectonic processes in continental carbonate systems.