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In the Classroom: Stratigraphy
The surface of the earth is constantly changing. Due to erosion, (the process by which the surface of the earth is worn
away by the action of water, glaciers, winds, and waves), and by deposition (the process of moving soil from
one place to another), objects left behind by earlier people were buried under soil. As the process continues,
the layering of soil deposits occur and a stratified site is created.
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