The rock type that involves stratification is sedimentary rock. Stratification refers to the layering of rocks that occurs as sediments are deposited over time.
Sedimentary rocks are formed from the accumulation and cementation of sediments, which can include particles of sand, clay, and other materials. As these sediments are deposited in layers, they become compacted and cemented together over time, creating a layered rock structure. This layering, or stratification, is often visible in sedimentary rocks and can provide important information about the geologic history of an area, including the types of sediments that were deposited and the environmental conditions that existed at the time.
In contrast, igneous rocks are formed from the cooling and solidification of molten rock, while metamorphic rocks are formed from the alteration of pre-existing rocks through heat and pressure. Volcanic rocks, on the other hand, are a type of igneous rock that is formed from lava or magma that has erupted onto the Earth's surface. These types of rocks do not typically exhibit stratification in the same way that sedimentary rocks do.