Diagenesis. Geological noun. Chemical and physical in sediments, subsequent changes to your deposit, for which become consolidated rocks. According to facies of their environment, include compaction, cementation, recrystallization and rare times, replacement ion, as happens in some limestones, consisting mainly of calcite: distinct, in which susbstituye partially to calcium magnesium, and her transmutes in dolomite: (CO3 ) 2CaMg, a process called dolomitización. The term derives from the Greek, the prefix «day»: through, and substantive "Genesis": origin. Synonyms: evolution, mutation, transmutation, transformation.