Final answer:
The rock type that results from metamorphosed shale is slate, a fine-grained, foliated metamorphic rock known for its use in roofing and tiling.
Step-by-step explanation:
The rock type which results from metamorphosed shale is slate. When shale undergoes low-grade metamorphism, it typically forms slate, a fine-grained, foliated metamorphic rock. Shale, which is a sedimentary rock composed of clay minerals, transforms into slate as it is subjected to an increase in temperature and pressure, typically during mountain-building processes. Slate is characterized by its ability to break smoothly along flat planes, and it is often used in construction, particularly for roofing and tiling. Other metamorphic rocks, such as quartzite, marble, and gneiss, come from different protoliths: quartzite from sandstone, marble from limestone or dolomite, and gneiss usually from schists or granites.