How Are River Rocks Formed?


Rocks with Jagged Edges

  • The formation of river rocks requires moving water and smaller rocks. Rocks easily eroded by water more likely form river rocks. Typical rocks with jagged edges can fall into the bottom of a river or stream bed or remain on the river bank. The speed of the river determines how quickly the rock becomes a river rock.

Weathering of River Rocks

  • In the river, water flows constantly over the rocks. The movement of water itself does not weather the rocks, but that water carries with it smaller pieces of rocks, sediment and silt with it. These tiny bits of broken stones hit the rocks at the bottom of the river, breaking off pieces of them, which the river carries away. The faster the water moves, the more sediment flows over the river rocks, hastening weathering.

Erosion of River Rocks

  • Erosion occurs when the pieces broken from the rock get carried away by the river. These bits of rock create the sand and silt along the river banks and at the mouth of the river. Eventually, a narrow stream widens into a large river. This slows the speed of the water, and some of the broken pieces of river rocks (sediment) fall to the bottom of the river bed. River deltas form in this way when the water from a river moves very slowly at its mouth where it flows into a larger body of water.


  • Photo Credit public domain/, Casey Marshall/, Doviende/, public domain/
Promoted By Zergnet


You May Also Like

  • How to Collect River Rocks

    River rocks are formed by the tumultuous effects moving water has on rock. After years of smashing into each other the sharp...

  • How to Landscape With River Rock

    River rock can add beauty to your landscape. Varying in size from pea gravel to boulder, river rocks add power and form...

  • Information on River Rocks

    River rocks are smooth, rounded rocks that have been smoothed over time from the water currents. There are a variety of uses...

  • What Type of Rocks Are River Rocks?

    River rocks have many common applications, including landscaping, ... Can a Shower be Made With Rock Tile? About eHow; eHow Blog;...

  • How to Make River Rock Rugs

    Imagine stepping out of your shower onto a bed of smooth river rocks instead of a terry bathmat. Give your bathroom a...

  • How to Make Rough Rocks Smooth

    ... a tank to smooth all rough edges. If you run the rocks ... River Rocks Shiny; How to Make Rough ......

Related Searches

Read Article

How to Build and Grow a Salad Garden On Your Balcony

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!