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White River Group silicate

Flattop Butte

Added by yongli on 08/24/2016 - 15:52, last changed on 12/28/2017 - 13:41
Located northwest of Sterling , Flattop Butte is a rock outcrop that was used extensively by prehistoric peoples as a source of stone for tools. The butte has a Chadron Formation capstone that is the only major bedrock source of high-quality stone between central Kansas/Nebraska and the Rocky...
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