As streams flow through Stone Mountain, layers of sand build up. Over time, the sand particles form a sedimentary rock called sandstone.What causes sandstone to change into metamorphic rock at Stone Mountain?

Metamorphic rock forms when existing rock is changed by intense heat and pressure. At Stone Mountain, these conditions can transform sandstone into metamorphic rock. Erosion reshapes rock, and adding or compacting more sand can form sedimentary rock, but those processes do not cause metamorphism.

AI-written and checked against the verified answer.