Geology Experience - Darrel Dunn, Ph.D., PG

Consulting Geologist and Hydrologist, Colorado Springs, Colorado.

Available for geologic and hydrologic consulting and contract work (see my Professional Synopsis).

Geologic Employment

My geology work experience includes:

  • Independent consulting geologist.
  • University teaching at assistant and associate professor levels
  • Petroleum geologist for major oil company

Places of Geologic Work

Performed geologic (non-hydrologic) work in the following states and provinces:

  • Colorado
  • Wyoming
  • Montana
  • Nebraska
  • Nevada
  • Illinois
  • Saskatchewan, Canada
  • Alberta, Canada

Types of Geologic Work

The following content shows types of geology work that I have done, with one or more examples for each type. The list is not exhaustive and the examples are not all-inclusive.

Petroleum Exploration

    • Explored for petroleum in Colorado (Denver-Julesburg Basin, NW Colorado, Colorado Plateau), Wyoming (DJ Basin), Utah, Nevada, Illinois, Saskatchewan, and Alberta for a major oil company. This work included well log interpretation, reservoir mapping, surface and subsurface geologic mapping, stratigraphy, hydrodynamic analysis of petroleum systems, and well site operations.

Earthquake Hazard

    • Assessed earthquake hazard at a proposed mine site.

Slope Stability and Landslide Hazard

    • Estimated slope stability at proposed real estate subdivisions.
    • Served as expert witness on the effect of irrigation on landsliding and testified in court.
    • Assessed the stability of slopes near a proposed mine in a mountainous area.

Snow Avalanche Hazard

    • Assessed snow avalanche hazard along an access road at a proposed mine in a mountain valley.

Coal Resource Assessment

  • Assessed value of coal resources on a ranch.

Statistics in Geology

    • Performed statistical analyses of stable isotope data on methane from different geological provinces in California. Click here and go to "California Methane Stable Isotope Data Analysis."
    • Published paper on "Probability of Anomalies on Contour Maps."
    • Performed a statistical analysis to see if sub-species of a fossil species were significantly different. (Honors thesis for geology bachelors degree.)

International Experience

  • Petroleum exploration in Saskatchewan and Alberta, Canada.

University Teaching - Geology

University of Toledo, Toledo, Ohio (Associate Professor)

  • Environmental Geology
  • Geomorphology
  • Geology for Engineers

Montana State University, Bozeman, Montana (Assistant Professor)

  • Historical Geology

University of Illinois, Champaigne/Urbana (Instructor)

  • Stratigraphy Laboratory
  • Historical Geology Laboratory


Available for geologic and hydrologic consulting and contract work. For more information, feel free to send an email to