GEOG 101 Lecture Notes - Lecture 19: Frost Heaving, Downhill Creep, Flocculation
Document Summary
4 main classes of mass movements are: Slow or rapid movement of a saturated mass of regolith or bedrock. Earthflows (coarse material slow) vs. mudflows (fine material fast) The point at which the pores of the material are saturated. Creates a bond, tension pulls it together. Leda clays or quick clays or sensitive clays (eastern ontario and. Settles once sediment runoff creates stability in a waterway. Clay has a polarity (positive and negative charges) When leda clays settle out, it created flocculation. Bonded by the polarity and salts (from the champlain sea) This image is what is present in the champlain sea. When water is added, salt is reduced. When the salt is reduced, the flocks become less bonded and less stable. As soon as something triggers sheer stress, the flocks will collapse, on water, and liquid limit may be reached. After collapse, strength is from water which creates flows) Slow, imperceptible downslope movement of surface materials.
