Discussion
In carbonate and siliclastic sedimentary rocks uniaxial strain can be accommodated by chemical compaction, by the process of :
Answer: C
The process is pressure solution.
Under burial load, grains dissolve preferentially where they press against one another, because solubility rises with stress at contacts. The dissolved material moves away and is redeposited as cement in pore spaces. The rock shortens in the direction of the load without fracturing, a chemical compaction that produces sutured grain contacts and stylolites in limestones and quartz-rich sandstones.
Screw dislocations are crystal lattice defects that allow plastic deformation within grains, not chemical compaction. Kink banding is a form of folding in layered or foliated rocks. 'Wedge deformation' is not a recognised compaction process.
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