When limestone, a sedimentary rock, is subjected to metamorphism, it is likely to transform into marble.

Here's why:

* Composition: Limestone is primarily composed of calcium carbonate (CaCO3).

* Metamorphic Changes: The heat and pressure of metamorphism cause the calcite crystals in limestone to recrystallize and grow larger. This process results in the formation of a new rock with a characteristically coarse-grained texture and often a banded appearance.

Other Possible Metamorphic Rocks:

While marble is the most common metamorphic rock derived from limestone, other possibilities exist depending on the specific conditions of metamorphism and the presence of impurities:

* Skarn: If limestone is metamorphosed in the presence of silica-rich fluids, it can form skarn, a rock with a complex mineralogy.

* Calc-silicate Rocks: If limestone is metamorphosed with other sedimentary rocks containing silica, it can form calc-silicate rocks.

Key Takeaway: Metamorphism of limestone typically results in the formation of marble.