Answer:
False
Step-by-step explanation:
Cross bed rocks are basically sedimentary rocks that are faulted to produce folded and tilted layers. Therefore, these rocks are primarily found as a part of ripples or dunes. These are curved at the bottom/base so that they could form or tangential surface to the base.
The upper portion of ripples are usually lost in erosion and it is the lower portion of the ripples that is represented by the cross beds.
Hence, the given statement is false