talus slope
_____ movement of a large block of rock as a single unit down a slope
slump
_____ sudden fall of rocks down a slope
landslide
_____ extremely gradual movement of soil down a slope
creep
_____ mudflow of volcanic ash and melted snow down the side of a volcano
lahar
sudden fall of snow down a slope.
avalanche
_____ sudden slipping of mud down a slope.
mudflow
Alfred Wegener's hypothesis