Evidence for the Presence of an Unconformity in the Formation

Multiple Choice

Evidence for the presence of an unconformity in the formation below is given by

A) the uptilting of the beds in layer 1.
B) the erosion that must have taken place at the boundary of 1 and 2.
C) the new sediment type deposited at the boundary of 2 and 3.
D) All of these are example of unconformities.