COLLUVIAL MASSES DEVELOP HAVING VOLUMES OF SEVERAL MILLION M3 AND THICKNESS OF UP TO 30 m. MATURE COLLUVIAL SLOPES MAY EXHIBIT ANGLES AS FLAT AS 7 – 10°. MANY LARGE COLLUVIAL MASSES INTER FINGER WITH GLACIAL OUT WASH AND RADIOCARBON DATING INDICATES THEY MAY HAVE FORMED UNDER PERIGLACIAL CONDITIONS