What is the functional difference between burial on Earth versus burial on Mars regarding organic material?

Answer

On Earth, burial returns mass to the local ecosystem, whereas on Mars, it acts as containment within the geological record.

On Earth, decomposition naturally integrates remains back into the environment; on Mars, burial merely confines an inert, frozen object away from surface erosion, preventing its return to any ecosystem.

What is the functional difference between burial on Earth versus burial on Mars regarding organic material?
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