Abstract

The Klapanunggal Formation in Cibinong, West Java, comprises a sequence of carbonate rocks that record a complex history of diagenetic alteration. This study investigates the vertical variation in diagenetic features within the limestone units, aiming to interpret their evolution through petrographic analysis. Samples from various stratigraphic levels were examined microscopically to identify key diagenetic processes including micritization, cementation, dissolution, and recrystallization. The results show distinct vertical patterns of diagenesis, suggesting varying diagenetic environments and fluid interactions through time. This vertical profiling provides valuable insights into the diagenetic evolution of the Klapanunggal Formation and contributes to a better understanding of carbonate reservoir quality in similar geological settings.