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    Under heat and pressure caused by magma or the tectonic plates, this limestone begins to recrystallize, changing the

    texture of the rock and causing the calcite crystals to grow and interlock. Most marbles form at convergent plate boundaries.

    A large part of earth’s crust is exposed to metamorphism. During the process of metamorphism, the calcite recrystallizes

    that further changes the texture of beige

    marble. With the progression of the process, the crystals become larger and easily recognizable.