Pyrite Geology, Hazards, Publications, Water July 21, 2022 Case Study: NARD Are pristine mountain waters always clean and pure? Can streams unaffected by human activities and livestock influences be unfit for human consumption, or for aquatic life? The existence of natural acid rock drainage (NARD) suggests a “no” to the former, and a “yes” to the latter question. But…
Detail from one of over 600 Denver Basin geophysical and lithological logs included in the ON-OF-78-08M digitization project. Photo credit: Colorado Geological Survey. Geology, Minerals, Publications June 3, 2021 New GIS data and maps For those of you who are subscribers to the CGS announcement list, we want to direct your attention to a handful of new maps and recently digitized analog data sets that we haven’t otherwise publicized. These include several important online GIS maps and downloadable data packages:…
West Salt Creek rock avalanche viewed from the air General, Hazards, Publications May 16, 2017 AASG 2017 John C. Frye Memorial Award for CGS publication The Association of American State Geologists announced that their annual John C. Frye Memorial Award for 2017 is granted to the CGS and the staff members who authored the report The West Salt Creek Landslide: A Catastrophic Rockslide…