Sedimentary processes are important for making beaches and dunes. Let's break this down into easy steps:

1. Erosion and Moving Sediments:

   • Waves hit coastal cliffs and wear them away, which creates sediments.
   • About 25% of coastlines experience erosion, which helps produce new sediments.

2. Deposition:

   • Sediments are moved along the shore by wave action and settle in calmer areas.
   • On beaches, sediment sizes typically range from very small (0.05 mm) to a little bigger (2 mm).

3. Beach Formation:

   • Beaches can be different widths, from 10 to 200 meters across.
   • Sediments can build up on beaches at a rate of about 0.5 meters each year.

4. Dune Formation:

   • Wind shapes the deposited sediments into dunes, which are often found behind beaches.
   • Dunes can grow as tall as 30 meters and are held in place by plants.

These processes work together to create ever-changing coastal areas that are important for nature and people.