Catastrophic ground cover collapse is geological activity that results in all of these except

a)a depression in the ground cover that is clearly visible to the naked eye.
b)the abrupt collapse of the ground cover.
c)the loss of at least 50% of the structure into the sinkhole.
d)structural damage to the building, including the foundation.

Catastrophic ground cover collapse is a geological activity and it is not affected by the loss of at least 50% of the structure into the sinkhole.

Option (c)

Explanation:

In Florida, these sinkholes are common and it differs from the catastrophic ground cover collapse. Sinkhole occurs due to an increase in soil pore pressure result in weaker soil of the substance.Four criteria must be satisfied for the geological activity to be called catastrophic ground failure.These four criteria evaluates the geological phenomenon other than sinkhole in the society.

Ba rock that formed 1,400 million years ago!

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