👉 Shale is a type of sedimentary rock that is composed primarily of silt and sand. It is usually found in geologic formations such as metamorphic rocks, igneous rocks, or carbonate rocks. Shales are characterized by their high porosity, which means they contain a large amount of free water, and their low permeability, which allows the movement of fluids like gas, oil, and minerals to pass through them. They can be found in various forms such as shales, g
