Diagenetic processes such as compaction , dissolution ( see Pressure Dissolution ), cementation , replacement, and recrystallization are the means by which an unconsolidated, loose sediment is turned into a sedimentary rock , e.g. sand into a sandstone , or peat into coal .
(an unconsolidated, loose sediment; is turned; into a sedimentary rock)
an unconsolidated, loose sediment
is turned
into a sedimentary rock