From Bushwalk Australia
Talus is the accumulation of a large pile of rocky boulders at the foot of a cliff or mountain, forming a slope. Talus is similar to scree but the rocks are much larger (boulders), and may have sharp edges. A talus slope is usually more dangerous to cross and more difficult to scramble up or down than a scree slope. The boulder field at the base of the Barn Bluff ascent is an example of a talus slope.