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The Goosenecks on the Yampa River in Dinosaur National Monument, Colorado, April ©2018 hopkins/neoscenes

Geology


Much of the CGS website is under heavy re-construction and will be for some time. The Publications area is working normally, but there is a lot of content from our original site that was in desperate need of updating. Please bear with us as we gather new information and rewrite hundreds of pages of material, gather and properly caption high-resolution images and otherwise bring you some very cool new and archival material never before seen! Stay in touch by subscribing to the >RockTalk< blog where we will announce new items periodically.


Colorado has some of the most varied, spectacular, and ultimately visible geology in the nation, spanning 2.7 billion years of the Earth’s history. From the eastern High Plains, to the central Rockies soaring more than 14,000 ft (4,200 m) above sea level, and to the western red-rock canyons, Colorado has incredibly diverse rocks, minerals, and fossils, along with many active geological processes and hazards.

The CGS is a leading scientific organization studying the geology and the complex geological processes around the state, producing detailed geologic, groundwater, and geologic hazard maps, along with mineral and energy resource information. The staff at the CGS combine expert field-work with laboratory and bibliographic research to describe and map Colorado geology. Funding sources include the U.S. Geological Survey’s National Cooperative Geologic Mapping Program (STATEMAP) as well as other local, state, and federal agencies. CGS data, maps, and publications, most of them free for download, are found through our GIS/Data index and the CGS Bookstore.

Geology

The Goosenecks on the Yampa River in Dinosaur National Monument, Colorado, April ©2018 hopkins/neoscenes

Colorado Geology

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Wildcat Mound, Colorado, August 2017. Photo credit: Martin Palkovic for the CGS.

Prospecting

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Plate of quartz crystals from the Ground Hog mine, Gilman mining district, Eagle County, Colorado. Photo credit: Ed Raines for the CSM Geology Museum.

For Rockhounds

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Aerial mapping tools, Paonia Quadrangle, Colorado, August, 2013. Photo credit: Dave Noe for the CGS.

Mapping

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Mancos Field Trip, Colorado, June 2009. Photo credit: David Noe for the CGS.

Field Trips / POGIs

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OF-18-05 Geologic Map of the Antero Reservoir NE Quadrangle, Park County, Colorado (detail)

Statemap

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More Geology

Stegosaurus (foreground) and Allosaurus in the Prehistoric Journey Exhibit, Denver Museum of Nature and Science, Denver, Colorado. Photo credit: Richard M. Wicker for the DMNS.

Fossils

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Middle Tertiary intrusives, Moseley Ridge, West Elk Wilderness, Colorado, June ©2009 hopkins/neoscenes.

Igneous Rocks

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Folding in Precambrian metamorphics at the Black Canyon of the Gunnison National Park, Colorado. Photo Credit: Vince Matthews.

Metamorphic Rocks

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Sedimentary rock: Tafoni weathering, Morrison Formation, Glade Park, Colorado, May ©2012 hopkins/neoscenes.

Sedimentary Rocks

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Diamonds in the rough, note the regular octahedral forms and trigons (of positive and negative relief) formed by natural chemical etching. Photo credit: Wikimedia.

Gemstones

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Faults & Structures

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