What is compaction and cementation?

Answer 1

Compaction does not necessarily cause materials to stick together. Cementation is more like having a binding material between the layers. Even compaction CAN result in binding together of materials such as sandstone.

Answer 2

Both are processes that occur during the formation of sedimentary rocks.

After sediments are deposited in a sedimentary basin, subsequent layers of particles and sediments are deposited on top of them. This causes a burial of the older sediments and and increase in the depth at which they are. Eventually this burial process makes the sediments to get in contact with the groundwater. This causes a chemical instability and it can either cause a dissolution of minerals contained in the sediments or a deposition of new minerals and salts contained in the water. If deposition occurs, this new minerals will form extremely small particles that will place themselves in the poral spaces of the soil or rock. This small particles have the ability of binding the sediments together, reducing porosity and permeability of the rock or soil. This process is the so called cementation process.

A further burial causes an increase in the pressure acting on the older sediments. Just like when you squeeze a sponge containing water, these sediments release volumes of water that are displaced to upper zones. This causes a reduction in the poral space between sediments. This is the so called compactation process.

Answer 3

Compaction is the process in which sediment is squeezed and in which the size of the pore space between sediment grains is reduced by the weight and pressure of overlying layers.

Cementation is the process in which sediments are glued together by minerals that are deposited by the bodies of water.

Answer 4

"When water gets between sediments as they are forming into a rock, cementation usually follows. Most water on Earth contains dissolved minerals, so as water evaporates or is squeezed out of the sediments, the minerals it was carrying may be left behind."

Answer 5

1. Cementation is the process in which dissolved minerals crystallize.

Answer 6

cementation is formed from sediment deposits. compaction is formed sediments getting forced by pressure.

Answer 7

Compaction of sedimentary rocks is when pressure brings sediments together. Cementation of sedimentary rocks is when pressure binds the sediment grains together.

Answer 8

they both help form or compress the minerals together that get the rock form it makes.

Answer 9

These two steps are necessary in the lithification process in which sediments are converted to sedimentary rock.