what is the cause of friction in rock surface?
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Rock types have little or no effect on friction. If however, the sliding surfaces are separated by large thicknesses of gouge composed of minerals such as montmorillonite or vermiculite the friction can be very low.
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Rougher surfaces have more friction between them than smoother surfaces. ... Heavier objects press together with greater force,and this causes greater friction between them. Friction Produces Heat. You know that friction produces heat.
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