Visit the Upper Arkansas Valley with two authors of this report from the @USGS: https://t.co/HU5VWtMXKs Register with RMAG: https://t.co/1pUnUq2bmN https://t.co/gVAF3PN1YR
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RT @USGS_Pubs: Geologic map of the upper Arkansas River valley region, north-central Colorado https://t.co/KEXe5c93uW #MappingMonday https:…
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RT @USGS_Pubs: Geologic map of the upper Arkansas River valley region, north-central Colorado https://t.co/KEXe5c93uW #MappingMonday https:…
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Geologic map of the upper Arkansas River valley region, north-central Colorado https://t.co/KEXe5c93uW #MappingMonday https://t.co/hqUEmaG1ol