Mount Garfield from Interstate-70 General January 10, 2020 Welcome to the final CGS/RockTalk web iteration If you want to find out what's happening with the new CGS site, read here! Apologies for the incompleteness, it will improve on a daily basis, we promise!
Soil arch in Qamf deposit, Loutzenhizer Arroyo. Piping cave/soil arch in Qamf deposit, Loutzenhizer Arroyo, Delta County, Colorado, April 2007. Photo credit: David Noe (CGS). Hazards July 12, 2018 Collapsible Soils By Jonathan White, Senior Engineering Geologist, Emeritus At the end of the 19th and beginning of the 20th Century, some of the first settlers of the plateau region of western Colorado along the Colorado River, and the Uncompahgre and North Fork of…
Water Resources Investigation WRI 2017-1a Geology, Water November 15, 2017 A new Water Resources Investigation: Upper Pierre Aquifer Our friends over at the Colorado Division of Water Resources (CDWR) have just released Water Resources Investigation WRI 2017-1a, The Upper Pierre Aquifer of the Cheyenne Basin, Northeastern Colorado, Geologic Cross Sections, authored by Ralf Topper, Clinton D. Meyer, Marshall Haworth, Kevin C. Donegan, Hillary Banks,…
Figure 03. Highly contorted sedimentary strata in the evaporitic terrain between Gypsum and Glenwood Springs Hazards May 5, 2015 Evaporite Karst Subsidence [ED: Originally written by Jonathan White, Senior Engineering Geologist (emeritus staff) for a 2001 volume of our paper RockTalk bulletin, this short introduction reveals some special geological areas of the state worthy of notice for a variety of reasons.] Many areas of Colorado are underlain…
Hazards March 13, 2013 The Science of Sinkholes This video, from the U.S. Geological Survey, explores the geological factors behind sinkholes and the related science. Narrated by Randall Orndorff, the Director of the USGS Eastern Geology and Paleoclimate Science Center.
Avalanche debris in the runout zone taken from a helicopter on the morning after the avalanche occurred Hazards March 24, 2003 Case Study: Avalanche – Silver Plume On March 23, 2003, a large avalanche occurred about one mile west of the Town of Silver Plume. The avalanche brought trees, rock, soil and snow to the valley floor, knocked down overhead utility lines, blocked the I-70 frontage road, damaged the town’s water treatment plant (WTP), and dammed Clear Creek. The dam was breached using explosives before the plant’s electric pump motors were flooded. With damage to the WTP’s chlorine contact tank and building, Silver Plum...