metamorphosed shale

Metamorphosed shale, or schist, is a type of rock that forms when shale—the original rock made from compacted mud and clay—undergoes intense heat and pressure over time. This process alters its mineral structure, resulting in a new rock with distinctive layers and shiny flakes, often composed of minerals like mica. The change reflects the rock's transformation, showcasing Earth's dynamic processes. Schist is commonly found in mountainous regions and is often used in construction and as a decorative stone due to its aesthetic appeal.