In a Sequence of Sedimentary Rocks,the Bottom Layer Is the Youngest

Multiple Choice

In a sequence of sedimentary rocks,the bottom layer is the youngest and the top layer is the oldest.This type of sequence suggests that the

A) principles of original horizontality and superposition are flawed.
B) beds must have been overturned by some structural disturbance.
C) dates for these rocks must be in error.
D) principles of original horizontality and superposition hold true.