cementation, in geology, hardening and welding of clastic sediments (those formed from preexisting rock fragments) by the precipitation of mineral matter in the pore spaces. ... The cement forms an integral and important part of the rock, and its precipitation affects the porosity and permeability of the rock.

How does compaction and cementation form sedimentary rock?

As the layers of sediment build up, the pressure on the lower layers increases. The layers are squeezed together and any water mixed in with the sediments is forced out. This process is called compaction. ... After compaction and cementation the sedimentary sequence has changed into a sedimentary rock.

What is cementation sedimentary rocks?

Cementation is the process of precipitation of mineral matter (cements) in pores within sediments or rocks. ... Cements even form crusts on surfaces at sediment-water or sediment-air interfaces. Precipitation of cements can occur at any stage from deposition, through burial, to uplift and re-exposure.