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January 20, 1996

OF-96-04-06 A Field Guide to the Proterozoic Anorthositic, Monzonitic, and Granitic Plutons, Laramie Range Southeastern Wyoming

Field trip no. 6 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-24 Geology of the Gold Belt Backcountry Byway, South Central Colorado

Field trip no. 24 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-01 Field Guide for the Detachment Structures of the Eastern Absaroka Range, Wyoming

Field trip no. 1 from “Geologic Excursions to the Rocky Mountains and Beyond” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-05 Permian-Triassic Depositional Systems, Paleogeography, Paleoclimate, and Hydrocarbon Resources in Canyonlands, Utah

Field trip no. 5 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-07 Synchronous Oligocene and Miocene Extension and Magmatism in the vicinity of Caldera Complexes in Southeastern Nevada

Field trip no. 7 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-08 Geology and Geologic Hazards of the Glenwood Springs Area, Central Colorado

Field trip no. 8 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-09 Geology of the Western San Juan Mountains and a Tour of the San Juan Skyway, Southwestern Colorado

Field trip no. 9 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-10 Sequence Stratigraphy of the Dakota Group and Equivalent Rocks From North-Central Colorado to Northeastern New Mexico

Field trip no. 10 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-11 The Slumgullion Landslide, Hinsdale County, Colorado

Field trip no. 11 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-19 Evidence for Early Proterozoic Reworking of Archean Rocks in the Central Laramie Mountain, Southeastern Wyoming

Field trip no. 19 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-20 History, Geology, Hydrogeology, Summitville Mine and Downstream Effects, and Other Nearby Mines of the San Luis Valley, Colorado

Field trip no. 20 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-21 Jemez Volcanic Field and Valles Caldera — Middle Rio Grande Rift

Field trip no. 21 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-22 Cretaceous-Tertiary Boundary in the Beloc Formation, Southern Peninsula of Haiti, West Indies

Field trip no. 22 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-23 Depositional Environments of Codell-Juana Lopez Sandstones and Regional Structure and Stratigraphy of Canon City and Huerfano Areas and Northern Raton Basin, South-Central Colorado

Field trip no. 23 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-25 Oblique Laramide Convergence in the Northeastern Front Range: Regional Implications from the Analysis of Minor Faults

Field trip no. 25 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-26 Precambrian Tectonics and Metallogeny of the Hartville Uplift, Wyoming

Field trip no. 26 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-27 Soil-Geomorphic Relationships near Rocky Flats, Boulder and Golden, Colorado Area with a Stop at the Pre-Fountain Paleosol of Wahlstrom

Field trip no. 27 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

January 20, 1996

OF-96-04-28 Tertiary Igneous Rocks and Laramide Structure and Stratigraphy of the Spanish Peaks Region, South-Central Colorado: Road Log and Descriptions from Walsenburg to La Veta

Field trip no. 28 from “Geologic Excursions to the Rocky Mountains and Beyond,” field trip guidebook of the 1996 Annual…

Surface operations at the Climax molybdenum mine, Lake County, Colorado, 2009. Photo credit: Vince Matthews for the CGS.

Minerals

February 18, 2020

Minerals

Minerals Colorado contains an abundance of mineral resources. The state has a long history of…

Gold; 9.5 cm tall, from the Little Jonny (Ibex) Mine, Leadville, Lake County, Colorado, USA, in the National Mining Hall of Fame Museum collection. Photo credit: Mark Mauthner.

Minerals

October 21, 2019

Metals

Metals Metals have been mined in Colorado since the 1800s. Metals are economic minerals that are used for a…

The gas well pad near the terminus of the West Salt Creek rock avalanche (flow direction right to left), Mesa County, Colorado, May 2014. Photo credit: Colorado Geological Survey.

Hazards

October 21, 2019

Landslides

Landslides Intro Details Publications Resources GIS/Maps A landslide is a sudden mass movement of soil, artificial fill, and/or rock down…

Hazards

October 21, 2019

Expansive Soil and Rock

Expansive Soil and Rock Expansive or swelling soils are one of the most prevalent causes of damage to buildings and…

HAZUS simulation: 1882 Earthquake, Rocky Mountain National Park Epicenter M 6.6, CEUS Attenuation

Hazards

October 18, 2019

ON-002 Earthquake Reference Collection

ON-002 Earthquake Reference Collection Staff at the CGS assembled the ON-002 Earthquake Reference Collection (ERC) with more than 700…

Vogel Canyon spring in the Purgatoire River Basin, Otero County, Colorado, May 2007. Photo credit: Larry Scott for the CGS.

Geology

October 18, 2019

Field Trips :: POGIs

Field Trips :: POGIs POGIs Links Here it is, finally, our new ON-004-02 Colorado POGI* map. We…

Figure 02. Several sinkholes give the name to Pothole Valley, east of Buford, Colorado, on the North Fork of the White River. Photo credit: Colorado Geological Survey.

Hazards

October 18, 2019

Collapsible Soils

Collapsible Soils Intro Details Publications Links Another type of ground subsidence that commonly occurs in Colorado is the settlement and…

Precambrian igneous and metamorphic rocks in Unaweep Canyon, Mesa County, Colorado. Photo credit: Vince Matthews for the CGS.

Geology

October 18, 2019

Colorado Geology

Colorado Geology From the low-lying eastern plains, to the central peaks soaring more than 14,000 feet above sea level,…

Abandoned mine structures in the Pike-San Isabel National Forest, Colorado. Photo credit: Colorado Geological Survey

Hazards

October 17, 2019

AML

Abandoned Mine Lands (AML) Intro Case Studies Maps and Publications Links Abandoned mine lands (AML) are those lands, waters, and…

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

Geology

October 11, 2019

Geologic Mapping

Geologic Mapping Intro GIS LiDAR Publications Links / Resources Geologic mapping involves plotting the location and attitude of the various…

Helicorder trace from Trinidad seismometer station, December 2019. Photo credit: CGS.

Hazards

October 7, 2019

Earthquakes

Earthquakes Intro Details Colorado Earthquakes Think you just felt an earthquake?? Check out the USGS Latest Earthquakes…

September 20, 1996

SP-44 Geologic Excursions to the Rocky Mountain and Beyond, Field Trip Guidebook for the 1996 GSA Annual Meeting, Denver

Twenty-eight field trip guides to parts of Colorado and surrounding states, compiled for the 1996 Geological Society of America’s Annual…

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OF-96-04-06 A Field Guide to the Proterozoic Anorthositic, Monzonitic, and Granitic Plutons, Laramie Range Southeastern Wyoming

OF-96-04-24 Geology of the Gold Belt Backcountry Byway, South Central Colorado

OF-96-04-01 Field Guide for the Detachment Structures of the Eastern Absaroka Range, Wyoming

OF-96-04-05 Permian-Triassic Depositional Systems, Paleogeography, Paleoclimate, and Hydrocarbon Resources in Canyonlands, Utah

OF-96-04-07 Synchronous Oligocene and Miocene Extension and Magmatism in the vicinity of Caldera Complexes in Southeastern Nevada

OF-96-04-08 Geology and Geologic Hazards of the Glenwood Springs Area, Central Colorado

OF-96-04-09 Geology of the Western San Juan Mountains and a Tour of the San Juan Skyway, Southwestern Colorado

OF-96-04-10 Sequence Stratigraphy of the Dakota Group and Equivalent Rocks From North-Central Colorado to Northeastern New Mexico

OF-96-04-11 The Slumgullion Landslide, Hinsdale County, Colorado

OF-96-04-19 Evidence for Early Proterozoic Reworking of Archean Rocks in the Central Laramie Mountain, Southeastern Wyoming

OF-96-04-20 History, Geology, Hydrogeology, Summitville Mine and Downstream Effects, and Other Nearby Mines of the San Luis Valley, Colorado

OF-96-04-21 Jemez Volcanic Field and Valles Caldera — Middle Rio Grande Rift

OF-96-04-22 Cretaceous-Tertiary Boundary in the Beloc Formation, Southern Peninsula of Haiti, West Indies

OF-96-04-23 Depositional Environments of Codell-Juana Lopez Sandstones and Regional Structure and Stratigraphy of Canon City and Huerfano Areas and Northern Raton Basin, South-Central Colorado

OF-96-04-25 Oblique Laramide Convergence in the Northeastern Front Range: Regional Implications from the Analysis of Minor Faults

OF-96-04-26 Precambrian Tectonics and Metallogeny of the Hartville Uplift, Wyoming

OF-96-04-27 Soil-Geomorphic Relationships near Rocky Flats, Boulder and Golden, Colorado Area with a Stop at the Pre-Fountain Paleosol of Wahlstrom