This site is an illustrated field guide that explains the geology of Colorado. A series of landscape and outcrop photographs with descriptions for each photo are provided. Outcrop photos of the Cretaceous Fox Hills Sandstone, Pierre Shale and Dakota Sandstone, as well as some older strata show good examples of bioturbation, cross-bedding and sandstone channels. A location map, geologic map, stratigraphic columns, correlation chart, glossary and close-up views of rocks are included as links.
