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

Also consider the geography of the beach in relation to hills and mountains. Rockfall from cliffs and mountains, as well as rain washing sediments down from the hills can place “newer” more coarse rock, or fine “older” silts in places that may seem odd.