What features can tell you how large the grains of a sedimantary rock?

The grain size of sedimentary rock can be assessed through several key features, including the texture, which describes the arrangement and size of the grains; sorting, which indicates the uniformity of grain sizes; and roundness, which reflects the degree of abrasion and transport. Additionally, the presence of specific minerals or fossils can provide insights into the depositional environment, which often correlates with grain size. Observing these characteristics under a microscope or hand lens can further clarify the grain size classification.