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RT @USGSVolcanoes: #DYK: Although the area has been volcanically active for 1.3 million yrs, #MountBaker itself was constructed ~50,000-10,…
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USGS Pub https://t.co/abAYoAXMAt via @USGS_Pubs
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RT @USGS_Pubs: Latest Pleistocene to present geology of Mount Baker Volcano, northern Cascade Range, Washington, https://t.co/CSW7ky6RJo ht…