Concretions, Nevada
Pictures of Sedimentary Structures
Concretions are not fossils, but form as minerals come out of solution to cement young sediments together. Learn and see more in the Concretions Gallery.
From Valley of Fire State Park, Nevada
Photo (c) 2008 Andrew Alden, licensed to About.com (fair use policy)More on Sedimentary Rocks
About Sedimentary RocksSedimentary Rock TypesSee My Sedimentary Rock Picture
Background Knowledge
Sedimentary Rock Classification DiagramsWhat Are Clasts?Wentworth Sediment Size Scale
Tools for Rockhounds
How to Look at a RockIdentify Sedimentary RocksHow to Identify Minerals
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