How Does Sedimentary rock - formation under the sea Work?

Sedimentary rock is like a layered cake made from tiny pieces of stuff that settle at the bottom of the sea.

Imagine you're playing in a sandbox, and every time a wave comes in, it drops some sand and little pebbles on the floor. Over many years, these layers pile up, just like how your cake gets more layers as you add more frosting and sprinkles. Sedimentary rock forms when tiny bits of rock, shells, or even pieces of old plants settle at the bottom of the sea and get pressed together over time.

Think about making a sandwich, you layer bread, then peanut butter, then jelly, and press it down. Similarly, under the sea, layers of sand, mud, or tiny shells build up on top of each other. The weight from above presses them together, and after a long time, maybe thousands of years, they harden into rock.

Sometimes, you can even see little fossils in sedimentary rock! Those are like the "crumbs" left behind by ancient sea creatures, just like how you might leave crumbs on your sandwich.