What is another word for rockpiles?
Pronunciation: [ɹˈɒkpa͡ɪlz] (IPA) 
Rockpiles are conical-shaped mounds of rock that are commonly found in areas where volcanic activity has occurred. They are also known by many different names, including cairns, stone heaps, rubble piles, scree, rocky outcroppings, and stone piles. Cairns are typically used as landmarks to mark a hiking trail or to mark a boundary between two areas. Stone heaps are often used in farming to create terraces for planting crops. Scree is a loose, gravelly rock formation that is formed by the erosion of mountains or cliffs. Rocky outcroppings are large, protruding rocks that are often found in mountainous regions. Stone piles are also used for construction purposes, such as for building walls or foundations.
