Pressure and heat
weathering and erosion
melting
compaction and cementation
Compaction and cementation presses the layers and sticks the particles together. This creates sedimentary rock. Rocks underground get heated and put under pressure, and are changed into metamorphic rock. ... When the magma (lava) cools quickly, it turns into solid extrusive igneous rock.
Answer: compaction and cementation. When the sediments turns it into a sedimentary rock, the rock it's self is more compacted. Therefore it would feel like cement in a way.