Question

Describe the sequence of events in the lithification of a sandstone

Answer 1

Lithification is a diagenetic process in which loose sediment is converted to hard rocky compaction and cementation. So sediments (sand) are buried the increase in pressure from the weight of the overlaying material pushes the grains closer together. The volume of sediment is reduced and the fluids between the grains are also squeezed out. This leaves the sandstone tightly compressed together this is lithification.

Answer 2

Answer and explanation;

• Lithification refers to the process that involves compacting, sedimentation and cementing of the mass together under pressure to create a sand stone, a form of sedimentary rock.
• Weathering and erosion of rocks creates sediments which collect and are then moved to another location.
• At some point the sediment may become heavy for the agent such as water to carry and thus deposited. As this deposit thickens, it becomes heavier and thus lithification process start.
• Compaction forces the grains of the deposited sediments closer together, forcing out air and water.
• As a result of compaction the sediment's pores becomes smaller. Minerals deposit in these pores as the water squeezes out. As the water moves out the pressure increases, the mineral deposits start hardening thus cementing the entire mass and this results to a sand stone.