Diagenesis refers to _. a. the development of layering within sedimentary rocks b. the act of deposition of sediment, which will ultimately form sedimentary rock c. physical and chemical alterations, including compaction and cementation, that occurs as sediment is transformed into rock.edding refers to _. a. the development of layering within sedimentary rocks b. the act of deposition of sediment, which will ultimately form sedimentary rock c. physical and chemical alterations, including compaction and cementation, that occur as sediment is transformed into rock.