In addition to limestone, evaporites like ____ and ____ can ...

[c0205847]

In addition to limestone, evaporites like ____ and ____ can create underground cavities.
   a. smectite; salt
   b. smectite; gypsum
   c. permafrost; smectite
   d. gypsum; karst
   e. salt; gypsum

Question 2

In order for limestone to collapse to form a major sinkhole, the ground above must be ____.
   a. thin and porous so that rainwater passes through easily
   b. small-grained so the soils can percolate through fissures
   c. thick and rich in cohesive clay to allow a cavern to form
   d. high in peat, allowing decomposition in the presence of oxygen
   e. acidic, to speed the dissolution process

[bpool94]

Answer to Question 1

ANSWER: a

Answer to Question 2

ANSWER: c

[c0205847]

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[31809pancho]

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