What type rock layer is easy to date?

Sedimentary rock layers are generally easier to date compared to other types of rock. This is because they often contain fossils, which can be used for relative dating through biOStratigraphy, as well as radiometric dating techniques for the minerals within them. Additionally, sedimentary rocks typically form in distinct layers, making it easier to establish a timeline of deposition. In contrast, igneous and metamorphic rocks can be more complex to date due to their formation processes.