A TALUS formation is a geological feature that is formed by the accumulation of rock debris at the base of a cliff or mountain. It is also known as a scree slope or TALUS cone. The term 'TALUS' comes from the Latin word for ANKLE, which is an appropriate description for this type of formation due to its sloping shape. TALUS formations are often found in mountainous regions and can be composed of a variety of materials, including gravel, sand, and boulders. They are important habitats for a variety of plants and animals, and can provide protection from erosion and landslides.