Munroe Quarry near Livermore Geology, Hazards April 11, 2022 Case Study: Lykins Formation Small but significant areas of Colorado are underlain by bedrock that is composed of evaporative minerals. These are salts and sulfates that precipitate out of salt-concentrated surface waters. In the geologic past these minerals were deposited in shallow seas within closed or restricted basins where…
Uranium roll front hosted in Dakota Sandstone Energy, Minerals August 14, 2018 Geology of Uranium Deposits in Colorado Uranium is a widespread and ubiquitous element. It has a crustal abundance of 2.8 parts per million, slightly more than tin. Primary deposits of uranium tend to concentrate in granitic or alkalic volcanic rocks, hydrothermal veins, marine black shales, and early Precambrian age placer deposits. Secondary (or epigenetic) deposits of…
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…