Time Machine Tuesday: Molybdenum

When most people think of Colorado mining, they think of gold or silver, or maybe coal.  But one of Colorado’s most significant mineral resources of the past century is molybdenum.  Today, however, demand for “moly” is declining.  Plans were recently announced to shutter Clear Creek County’s huge Henderson Mine — the world’s largest primary producer […]

Fracking: Risk to Homes and the Environment

Today’s Denver Post headlined “Colorado residents push to protect homes, river from fracking,” which discusses the use of state rules that were established by recommendations from a 2014 task force.  If you’re looking for the task force’s report, which does not appear to be linked to in the Post article, you can find it here.  […]

Time Machine Tuesday: Diamonds in Colorado

Did you know that Larimer County had a diamond mine?  The Kelsey Lake Mine was operational from 1996 to 2001.  During that time period, in 1999, the Colorado Geological Survey released What Are Diamonds?, an issue of their popular Rock Talk series.  This publication discussed Northern Colorado’s State Line Kimberlite District and the Kelsey Lake […]

Time Machine Tuesday: Oil and Gas Fields of Colorado

Most Coloradans know that oil and gas production has skyrocketed in Colorado, but a 1975 resource from the Colorado Geological Survey illustrates the industry’s development visually and using statistics.  Oil and Gas Fields of Colorado includes two parts:  a map, and a book of statistical data.  You can see how much the industry has expanded […]

Volcanoes and Volcanic Activity

Volcanoes in Colorado? While we don’t have volcanoes in Colorado today, volcanoes certainly played a role in the geological formation of the area.  Evidence of volcanoes can be found as close to Denver as Dinosaur Ridge.  In the Colorado Geological Survey’s Dinosaurs in Our Backyard:  A Dynamic Visit to Dinosaur Ridge, Fossil Trace and Red […]

Time Machine Tuesday: 1882 Colorado Earthquake

Earthquakes in Colorado?  Yes, earthquakes are certainly possible in Colorado, and on November 7, 1882, Colorado was hit by an earthquake thought to be centered in the northern Front Range.  A century later, in 1986, the Colorado Geological Survey published a report, An Interpretation of the November 7, 1882 Colorado Earthquake by Robert M. Kirkham […]

Time Machine Tuesday: Colorado Rocks and Minerals

Back in 1913, mining played an important role in Colorado’s economy and employed thousands of workers.  Hundreds more were made wealthy by owning and investing in Colorado’s mines.  Therefore it is no surprise that in that year the Colorado Geological Survey published a book entitled Common Rocks and Minerals:  Their Occurrence and Uses.  As suggested […]

Time Machine Tuesday: First Report of the Colorado Geological Survey, 1908

The very first report of the Colorado Geological Survey covered the activities of the year 1908.  In addition to giving some information on the geological landscape of Colorado, the report also offers a history of the agency up to that time.  According to the report, the Territorial Legislature had established the office of State Geologist […]

Time Machine Tuesday: Oil and Gas in Colorado, 1925

Where was oil found in Colorado in the early days of the automobile?  How do different parts of the state compare in oil and gas production based on geological epochs?  A 1925 map (reprinted in 1984) from the Colorado Geological Survey answers these questions and more.  Although the early map did not use color, it […]

Colorado Points of Interest

As you travel through Colorado, you will find numerous markers designating points of interest.  Some of these are historical, and others geological. Historical – History Colorado (formerly the Colorado Historical Society) places and maintains point of interest markers in places where important historical events occurred around the state.  Our library recently acquired an interesting Historical Society publication done in 1972.  […]

Oil and Gas Resources

One of the specialties of the University of Colorado Law School is natural resources law, and the School’s Getches-Wilkinson Center for Natural Resources, Energy, and the Environment is sponsoring the Intermountain Oil and Gas BMP Project.  The Project’s website features a helpful resources page on their website that includes information on oil and gas development, GIS, […]

Colorado Geological Survey is Moving

On January 31, the Colorado Geological Survey will transfer from the Colorado Dept. of Natural Resources to the Colorado School of Mines, as specified in HB12-1355 during last year’s legislative session.  The one exception to the move is the Colorado Avalanche Information Center.  HB13-1057, passed unanimously by the House yesterday and which will almost certainly […]

Swelling Soils: Homebuyers Beware

If you’re looking at buying a home in the Denver Metro area, particularly in the area around C-470 near Bowles and Wadsworth in Jefferson County, or if you currently live in the area, make certain you read the Colorado Geological Survey’s Guide to Swelling Soils for Colorado Homebuyers and Homeowners, available for checkout from our […]

Dinosaur National Monument

On this day 97 years ago, October 4, 1915, Dinosaur National Monument in western Colorado and eastern Utah was established.  Dinosaur National Monument is so named because, says the National Park Service, “[d]inosaurs once roamed here.  Their fantastic remains are still visible embedded in the rocks.”  But there is more to Dinosaur National Monument than prehistoric fossils.  […]

Colorado’s State Symbols: The State Rock

Not to be confused with the State Gemstone (Aquamarine) and the State Mineral (Rhodochrosite), the State Rock is Colorado Yule Marble.  Quarried in Marble, Colorado in Gunnison County, Colorado Yule Marble has been used in many important buildings around the state including the Colorado State Capitol; it has also been used in the Washington Monument, […]

Colorado's State Symbols: The State Mineral

Colorado’s State Mineral is the deep red Rhodochrosite.  The Colorado State Archives tells us that “On April 17, 2002, Colorado Governor Bill Owens signed a bill passed by the General Assembly designating the Rhodochrosite as the new state mineral. While there was some debate as to whether the state mineral should be gold or silver or […]

Colorado Geology for Tourists

Are you taking a road trip through Colorado this summer?  Looking for something to do with out-of-town guests?  Or just interested in our state’s natural history?  Then check out the Tourist Guide to Colorado Geology from our library.  Published by the Colorado Geological Survey, the Tourist Guide is an easy-to-read guide to discovering some of […]