Deposits down a hillslope of imbricated rock fragments bedded parallel to the slope. It may be that the debris is shattered by freeze–thaw, with larger fragments rolling downwards; wind might be the depositional process (Cailleux (1967) Biuletyn Peryglacjalny 17; Edlund and Woo (1992) Geol. Surv. Canad. Part B 92–1B; Lewkowicz (1998) Canad. J. Earth Scis 35).