Question

Which process results in the formation of sedimentary rocks?

A. Rock fragments are layered and pressurized over time.
B. Rocks are sorted under a glacier as the glacier retreats.
C. Rocks are heated and changed by volcanic forces quickly.
D. Rocks that contain two or more minerals melted together.

Answer 1

A. Rock fragments are layered and pressurized over time.

Step-by-step explanation:

Sedimentary rocks are derived from pre-existing rocks that have been subjected to agents of denudation, weathered, transported and deposited within a basin.

In the basin, the sediments are accumulated in their final resting position.

• Sediments are accumulated as layers on top of one another.
• The pressure of the sediment on top of another forces out water and presses the layers into sheets.
• Over time, the compression leads to lithification of the rock.
• During lithification, compaction and cementation occurs.