Answer :
Final answer:
The type of metamorphism that occurs in this scenario is regional metamorphism, which results in the limestone being metamorphosed into marble.
Explanation:
The scenario described in the question is one of regional metamorphism, as this type of metamorphism occurs when high temperatures and pressures impact large areas of the Earth's crust due to tectonic processes. As a result of this metamorphic process, crystalline limestone, which is already a metamorphic rock in itself, would likely be further metamorphosed into marble. Marble is a common product of the metamorphism of limestone and is characterized by larger crystals and a more random arrangement than its parent limestone due to the higher heat and pressure conditions it was exposed to during regional metamorphism.
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