This occur due to "weathering and erosion of the old layer".
Answer: Option B
Explanation:
A submerged erosional or non-depositional surface that isolates masses of two rock or strata of varying ages, showcasing the deposition of sediments was not permanent is called as an Uniformity. The older layer was usually subjected to erosion for a time interval before the younger layer was deposited but the expression is used to characterize any break is the "sedimentary geological record".
The local record for such an interval is incomplete and geologists need to use other information to uncover that aspect of that area's geological history. The unrepresented geological time period is called a hiatus. It's a relative dating kind of.
