After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap, in the geological record?
a. an earthquake or motion along a fault
b. new sediment deposits build up on the eroded area
c. radioactive decay along a fault
d. a volcanic eruption near the eroded area
I think that it is either B or D.
4 answers
Nope.
Then it must be C?
B is correct.
I find it funny that connexus found people cheating and changed the answers