Why do some beaches have cliffs?

Answer 1

Depends on the rock formations and composition and how they are affected by the sea, as well as the actual geography of the land...

This sounds a bit like geography homework! ;)

Try this website: http://www.georesources.co.uk/leld.htm

Cliffs are explained about halfway down.

Answer 2

Cliffs are formed by erosion. Those cliffs you were on about were never always there, thousands, maybe millions of years ago the cliffs were much further out to see and and smoothly sloped underwater. The water washed away the land it was by and slowly, cliffs were formed and began retreating back inland. You can see this effect on some coastlines during huge storms when the cliff collapses. Imagine that over millions of years.

However, the answers to your question is that the reason some beaches have cliffs and some don't is becasue the land is low-lying meaning it's close to sea level. Cliffs only occur when there is a large gap between sea level and land level.

Answer 3

Chalk Cliffs are formed from millions and millions off of small crustations millions of years dieing and forming the chalk, over time the seas have changed (due to ice ages etc) and now we have chalk cliffs, the reason they are cliffs is because they are a soft material the sea can easily erode these and give us the lushish white cliff of dover and seven sisters.