Diagenesis is the process by which changes occur in sediment after it is deposited until the onset of metamorphism. During diagenesis, loose sediments are transformed into a solid rock through compaction, recrystallization, dissolution, replacement, cementation, and other processes. These diagenetic processes are important as they can significantly modify the composition and properties of the original sediment and even destroy sedimentary structures in rare cases.

1. Represented by Arindam Mukherjee(M.Sc in
Applied Geology)

2.  “Diagnesis” is a change in sedimentary rock
which may be a chemical , physical or biological
change after when a sediment is deposited in an
environment and it has been continued until
metamorphism takes over . During diagenesis an
indurated rock is produced from an
unconsolidated loose sediments .At higher
elevated temperature (150 °-200° C) or pressure
diagenesis may occur . Early digenetic event
occur at shallow burial and late digenetic event
occur at deep burial .

4.  Following stages are involved several stages
:- i) Compaction
 ii) Recrystallization
 iii) Dissolution
 iv) Replacement
 v) Authigenesis
 vi) Cementation

11.  Digenetic process are important for several
reasons
 i) They can considerably modify a sediment .
 ii) They can also effect sediments porosity
and permeability .
 iii) In rare case original structures of
sedimentary rocks may destroyed .