The thick landslides occur in colluvium that is thicker than about 2 m. Morphologically, they consist of a simple head, a complex of toes, and poorly expressed flanks. The heads occupy a narrow zone containing a few scarps and open cracks; the horizontal component of displacement in the heads is smaller than the vertical component. The toes of movement typically emerge at several places downslope. If the toe emerges at a sharp break in slope, such as a roadcut, the vertical component of displacement is much larger than the horizontal component. If the toe emerges at a smooth or flat part of the slope, displacement is virtually all horizontal, and the lobe of moving ground may override the preexisting ground surface. The flanks of the landslide lobes are poorly expressed and could not be located in the field. Shear displacement on the landslide flanks is evidently distributed over too broad an area to produce cracking or faulting. However, the distributed shear may contribute to the extensive structural damage to homes that seems to take place when only small amounts of displacement have occurred.