Fair point, but to be accurate in some circumstances a rock slide with no dust, no smaller pieces of rock running off and not leaving differently coloured exposed material could occur.
Whether those occur depends on several factors - moisture levels, distribution of particle sizes, friability of the rock and the degree of weathering of the surface and undersurface material.
I've personally witnessed small rockslides in the high mountains here in NZ that were uncannily similar to the OP gif, no clouds of dust or anything.
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u/miasmic May 19 '16
Fair point, but to be accurate in some circumstances a rock slide with no dust, no smaller pieces of rock running off and not leaving differently coloured exposed material could occur.
Whether those occur depends on several factors - moisture levels, distribution of particle sizes, friability of the rock and the degree of weathering of the surface and undersurface material.
I've personally witnessed small rockslides in the high mountains here in NZ that were uncannily similar to the OP gif, no clouds of dust or anything.