Todd Dallegge

Todd Dallegge

Adjunct Instructor

Earth and Atmospheric Sciences
Natural and Health Sciences

Contact Information

Mailing Address
University of Northern Colorado
Earth and Atmospheric Sciences
Campus Box
Greeley, CO 80639


Ph.D.  University of Alaska Fairbanks, Geology
M. S.  Northern Arizona University, Geology
B. A.  University of Northern Colorado, Geology

Professional/Academic Experience

After 15+ years in the petroleum industry, I am currently the Senior Geologist/Geological Advisor for Jonah Energy in Denver. I started my career with Phillips Petroleum in Anchorage, Alaska, but was moved to Houston, Texas, following the merge that created ConocoPhillips. I worked on a variety of global and U.S. exploration and development prospects during my time with ConocoPhillips. More recently I have worked at small- to mid-sized independents on a variety of U.S. unconventional resource plays in Wyoming, Utah, Montana and Colorado, but some of my favorite roles have been as an industry geoscience recruiter, intern supervisor/mentor and educator of young geoscience professionals.

Research/Areas of Interest

My educational/research background is in chronostratigraphy, coal bed methane and basin analysis. I have always had a strong fascination for the Cenozoic Era and badlands topography. I grew up hiking and motorcycle riding in the White River Group badlands in NE Colorado and spent my graduate studies looking at Miocene rocks on the Colorado Plateau and Cenozoic strata in Cook Inlet, Alaska.

I am passionate about energy education for the general public and my continued involvement with academic institutions to help them develop tomorrow’s students for the “new” energy industry. I am thrilled to be a part of the faculty here at UNC to give back to the department that started it all for me.

Publications/Creative Works

Dallegge, T.A., 2008, 40Ar/39Ar geochronology of lavas from the Central Plateau Member of Plateau Rhyolite with implications for magma residence times and eruptive reoccurrence intervals, Yellowstone National Park: Mountain Geologist, v. 45, no. 3, p. 77-98.

Barker, C.E., and Dallegge, T.A., 2006, Secondary gas emissions during coal desorption, Marathon Grassim Oskolkoff -1 well, Cook Inlet Basin, Alaska: implications for resource assessment: Bulletin of Canadian Geology, v 54, p. 273-291.

Dallegge, T.A., and Layer, P.W., 2004, Revised 40Ar/39Ar chronostratigraphy of the Kenai Group using low-potassium bearing minerals, Cook Inlet Basin, Alaska: Canadian Journal of Earth Science, v. 41, no. 10, p. 1141-1158.

Dallegge, T.A., Ort, M.H., and McIntosh, W.C., 2003, Mio-Pliocene chronostratigraphy, basin morphology, and paleodrainage relations derived from the Bidahochi Formation, Hopi and Navajo Nations, northeastern Arizona: The Mountain Geologist, v. 40, no. 3, p. 55-82.

Dallegge, T.A., 2002, Application of 40Ar/39Ar chronostratigraphy to geologic problems in Yellowstone Caldera and Cook Inlet Basin: Dissertation, University of Alaska Fairbanks, Fairbanks, AK, 272 p.

Gross, E.L., Patchett, P.J., Dallegge, T.A., and Spencer, J.E., 2001, The Colorado River system and Neogene sedimentary formations along its course: apparent Sr isotopic connections: Journal of Geology, v. 109, p. 449-461.

Dallegge, T.A., Ort, M.H., McIntosh, W.C., and Perkins, M.E., 2001, Age and depositional basin morphology of the Bidahochi Formation and implications for the ancestral upper Colorado River, in: Young, R.A., ed., Colorado River: Origin and Evolution: Grand Canyon Association Monograph 12, p. 41-45.

Dallegge, T.A., and Barker, C.E., 2000, Coal bed methane gas-in-place resource estimates using sorption isotherms and burial history reconstruction: An example from the Ferron Sandstone Member of the Mancos Shale, Utah, in: Kirschbaum, M.A., Roberts, L.N.R., and Biewick, L.R.H., eds., Geology and Resource Assessment of Coal in the Colorado Plateau: Arizona, Colorado, New Mexico, and Utah: U.S. Geological Survey Professional Paper 1625-B, Chapter L, CD-ROM.

Dallegge, T.A., Martirosyan, A., Maldonado, F., and Pierce, B.S., 2000, Stratigraphy and geologic map of the Tertiary Coal bearing deposits of the Shirak Region, northwestern Armenia, U.S. Geological Survey, Open File Report 00 159, 50 p.

Dallegge, T.A., 1999, Correlation and chronology of the Miocene-Pliocene Bidahochi Formation, Navajo and Hopi Nations, northeastern Arizona: Masters Thesis, Northern Arizona University, Flagstaff, Arizona, 304 p.