Figure 7

Summary sketch of the meteoritic diagenesis observed in this study—(A) Loose sediment; (B) Mineral-driven meteoric diagenesis (MDD) initially result from the dissolution of aragonite grains and the subsequent precipitation of calcite cement in the pore space; The cement variably fills pore space, illustrating the partial water saturation of the sediment, and cemented intervals can laterally transition to uncemented sediments; (C) The process ultimately leads to an inversion of the porosity where all grains are dissolved and inter-granular porosity is filled with cements; The circulation of water can lead to water-driven diagenesis (WDD) resulting in the formation of dissolutions features (karts) and calcrete.