Figure 2: Evolution of porosity in carbonates (based on Derby, 1984 [65] which was modified from Friedman and Reeckmann, 1982 [66]). Porosity generally decreases during early diagenesis and further burial until the onset of pressure solution and/or fracturing that creates additional pore space. Further crystallization inhibits the porosity rise until another stage of porosity rise due to recent erosion that creates fissures, vugs and caverns.