Final answer:
Sedimentary rock that becomes molten ultimately cools to form igneous rock, signifying a transition as part of the rock cycle.
Step-by-step explanation:
If sedimentary rock becomes molten, it transitions from its existing form into a molten state and upon cooling, it would form an igneous rock. This process is part of what geologists refer to as the rock cycle, where rocks transform from one type to another over geological time due to various processes like heat, pressure, and erosion.
When sedimentary rocks are subjected to intense heat at depths within the Earth or near volcanic activity, they can melt and the subsequent cooling of this molten material results in the formation of igneous rocks. Common examples of igneous rocks include basalt, obsidian, and granite; these are characterized by their crystalline structure formed as magma cools and solidifies.