Britannica Kids - Sedimentary Rocks

Sedimentary rock can be formed in several ways. Some is formed when rocks of any kind are worn away by rain, wind, and other elements...

Earth How - Sedimentary Rocks

Sedimentary rocks form from two key processes: First, compaction squeezes material together. Second, cementing glues the squeezed material together. The key ingredient to sedimentary rocks is sediments. Sediments are just rocks that have been broken down by weathering...

USGS - Sedimentary Rocks

Sedimentary rocks are formed from pre-existing rocks or pieces of once-living organisms. They form from deposits that accumulate on the Earth's surface. Sedimentary rocks often have distinctive layering or bedding. Many of the picturesque views of the desert southwest show mesas and arches made of layered sedimentary rock...