* Sedimentary rocks are formed from the accumulation and cementation of sediments.
* Sediments are fragments of existing rocks, minerals, or even organic matter.
* Igneous rocks, metamorphic rocks, and even other sedimentary rocks can be weathered and eroded into sediments.
Examples:
* Granite (igneous) can be broken down into sand grains.
* Marble (metamorphic) can be eroded into pebbles.
* Limestone (sedimentary) can be fragmented into smaller pieces.
The process of breaking down rocks into sediments is called weathering, and the process of moving those sediments is called erosion.
