Answer :
Grain size, shape, and pattern describe a rock's texture. They provide clues about the rock's history and environment of deposition, with texture being key in determining its metamorphic characteristics.
Grain size, shape, and pattern are all terms that geologists use to describe a rock's texture. The grain size of a rock can provide information about the rock's transport and depositional history, with larger grains suggesting proximity to the source rock and smaller grains indicating long-distance travel. The grain shape indicates the degree of abrasion during transportation, with more angular grains being closer to the source rock and more rounded grains having traveled further. Additionally, the pattern of grains, especially in metamorphic rocks, can indicate the type of metamorphic texture, such as foliated or non-foliated, which is a description of the shape and orientation of mineral grains within the rock.
