Question

Match the lithification processes.

1. contact pressure causing grains to "grow" together


2. increase in density due to weight of overburden


3. precipitation of bonding agents between grains


A. recrystallization

B. cementation

C. compaction

Answer 1

Recrystallization: contact pressure causing grains to "fuse" together

Cementation : precipitation of bonding agents between grains

Compaction : increase in density due to weight of overburden

Lithification is the process by which sediments are converted into sedimentary rocks. During this process, recrystallication, compaction, and cementation of mineral grains occur.

The process starts with the compaction of sediments. The overburden weight of new sediments in the basin adds to the one originally deposited. This compresses the sediment. The volume of reduced and the density increases.

Recrystallization follows suit as the contact pressure of grains makes them fuse together. It is more like a reworking of sediments. In this process, cementing materials can precipitate and cause sediments to be more fused together.

This is why most sediments are made up of clasts in a matrix of cementing materials.

Hope this helps, Let me know if wrong ( im pretty sure that i am not but yeah...), OH! and Good LUCK! :D ;P!

Answer 2

ReCrystallization

Contact pressure causing grains to "grow" together.

It's a metamorphic process used to rearrange the atoms of the minerals in order to modify them in to the required form under the specific temperature and pressure. For example conversion of limestone into marble.

Cementation:

Precipitation of bonding agents between grains.

Cementation is the process in which the minerals in the form of fluid fills in spaces between the grains and binds them together upon crystallizing.

Compaction:

Increase in density due to weight of overburden.

Compaction as it's name indicate is the compaction of the sediments due to the heavy weight of the rocks which reduce their size and increase their density.