What is the purpose of striations?

Striations are linear marks or grooves found on the surface of rocks and minerals, typically formed by geological processes such as glacial movement. They indicate the direction of ice flow and can provide valuable information about past environmental conditions. In a biological context, striations refer to the alternating light and dark bands in muscle fibers, which are crucial for muscle contraction and function. Overall, striations serve as important indicators in both geology and Biology, helping to understand processes and functions in these fields.