Why are there gravel beaches? In thousands of years of waves crashing on the beach shouldn’t all the gravel have become sand?

Question

Why are there gravel beaches? In thousands of years of waves crashing on the beach shouldn’t all the gravel have become sand?

In: 6381

Answer 1

The sand doesnt stay on the beach forever. It came from somewhere. Its going to somewhere. As it shuffles along on this path, from inland rocky outcropping to ocean deep. We get a snapshot of how fine it was at that moment on the beach.