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Published: January 6, 2009
Rocks offer clues about life
Much of Oklahoma is covered in sedimentary rocks, mostly limestone and sandstone. You can see these rock types in the banded layers of the exposed parts of the Arbuckle Mountains in central Oklahoma.
Sedimentary rocks form when wind and rain erode mountains. The fine particles carried by streams and rivers usually end up in the ocean, where they form layer after layer. The composition of each layer depends upon detai...
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