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

If we were to speed time up while watching the earth’s surface from space, we would see the earth’s crust constantly moving, forming, reforming, and shaping.

As humans, it’s hard to picture something like rock and earth as fluid and mobile, but over thousands of years…

I was taught pebbled beaches were either young beaches (created more recently), or the result of geologic activity.

I hope this helps. IANA geologist, am farmer.