The Reason Clay Minerals (And Other Phyllosilicate)often Form the Slip

question 3

Multiple Choice

The reason clay minerals (and other phyllosilicate) often form the slip plane for a landslide is that they

• A) Have platy structures, allowing them to stack up and then slip past each other, like a deck of cards and also have high porosity.
• B) Have rigid structures that can trap oil and the oil acts as a lubricant for the landslide.
• C) Are made of material that dissolves easily in water, initiating a landslide in the process.
• D) Change their internal structure under stress, allowing them to get "mushy" and thus be slippery.

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