Rocks and Layers
This USGS page describes sedimentary rock formation. The next page talks about fossils and how they are used to date the rock strata.
This is a great resource for teachers to gain background knowledge on sedimentary rock formation and how fossils are used to date rock strata. Students could also use the site for research purposes.
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eduToolbox® is a resource-sharing portal developed by the Ayers Institute for Learning & Innovation with collaborative support and funding from the Tennessee Department of Education and the U.S. Department of Education's Math & Science Partnership program.
