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2023 Colorado Geology Calendar
Get your 2023 Colorado geology calendar while the supplies last! This compilation features many spectacular landscapes from across the state as captured by CGS staff.GEO-2023-01 Calendar
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Since the first CGS Bulletin A Preliminary Report on the Geology of the Monarch Mining District, Chafee County in 1910, the Survey has issued more than nine hundred professional reports, publications, maps, and GIS datasets concerning the geology, groundwater hydrology, mining, energy production, and geologic hazards around the state of Colorado.