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NEW release from @USGS, @USGSAZ, "Geologic Map & Hydrogeologic Investigations of the Upper Santa Cruz River Basin, Southern Arizona. The 1:50,000 map is accompanied by an 86-page pamphlet with detailed map unit descriptions. Download https://t.co/fXV
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RT @USGS_Pubs: Geologic map and hydrogeologic investigations of the upper Santa Cruz River basin, southern Arizona, https://t.co/xUZBezdX4X…
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Geologic map and hydrogeologic investigations of the upper Santa Cruz River basin, southern Arizona, https://t.co/xUZBezdX4X https://t.co/05Siioosbk