| Detailed geological investigation showed that it was the result of delayed compactional diagenesis of the Chalk Formation reservoir rocks. |
| Minerals in a sedimentary rock can have formed by precipitation during sedimentation or by diagenesis. |
| These processes, collectively termed sedimentary diagenesis, occur through interactions between sediment grains and the waters in contact with them. |
| When buried by later sediments, clays can undergo changes in their mineralogy, a process known as diagenesis. |
| Pore-filling cementation is also common during the diagenesis of chalks, resulting in rapid porosity loss. |
| Comparisons with the potential source rocks of these sediments suggest little alteration during sediment transport and diagenesis. |
