What does an unconformity in a sequence of rock layers reveal about geologic history?

A.
A rock layer must have turned upside down.

B.
A layer of rock might have eroded.

C.
The layers must cover hundreds of square miles.

D.
The layers must have been deposited very quickly.

Question

What does an unconformity in a sequence of rock layers reveal about geologic history?	
 
 A.
A rock layer must have turned upside down.
 
 B.
A layer of rock might have eroded.
 
 C.
The layers must cover hundreds of square miles.
 
 D.
The layers must have been deposited very quickly.

confluxepic · Answer

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anonymous · Answer

B. A layer of rock might have eroded