Cementation
Cementation is the chemical process that completes the transformation of loose sediment into solid sedimentary rock, as water carrying dissolved minerals flows through gaps between compacted sediment grains and crystallizes, binding particles together. In Amplify Science (California) Grade 7, Chapter 1: Rock Formations, this process is the final step in creating durable sedimentary rock.
Key Concepts
The transformation into sedimentary rock is completed by a chemical process. Water carrying dissolved minerals flows through the tiny gaps between the compacted sediment grains.
Over time, these minerals crystallize and act as a natural glue, binding the particles together. This process, called cementation , solidifies the loose debris into a rigid, durable material known as sedimentary rock .
Common Questions
What is cementation in rock formation?
Cementation is the process where dissolved minerals in groundwater crystallize in the spaces between compacted sediment grains, acting as a natural glue that binds the particles together into solid rock.
How does cementation differ from compaction?
Compaction squeezes sediment grains together through pressure, reducing spaces between them. Cementation fills the remaining spaces with minerals that harden, chemically binding the grains into solid rock. Both processes are needed.
What minerals cement sedimentary rocks together?
Common cementing minerals include silica (quartz), calcite (calcium carbonate), and iron oxides. These dissolve in water, travel through pore spaces, and crystallize around sediment grains to bind them.
Where is cementation covered in Amplify Science Grade 7?
Cementation is covered in Amplify Science (California) Grade 7, Chapter 1: Rock Formations.