About Us

Why Use Earthmaps and Work With Whitehall Geogroup, Inc.?

  • Earthmaps brings you up-to-date links to Montana geology and map data.
  • Earthmaps offers unique Montana field trip guides.
  • Whitehall Geogroup, Inc.’s staff has, collectively, over 85 years of professional experience in the earth science.
  • We love our customers and welcome your feedback and suggestions. Use our Contact Us page to tell us what we’re doing right or what we can improve on.

Our Work Team

Dr. Debra Hanneman

Debra Hanneman received a B.S. in Natural History from the University of Toledo, Ohio, a MSc. in geology from the University of Calgary, Alberta, Canada, and a Ph.D. in geology from the University of Montana, Missoula. Her professional life in the earth sciences has spanned academics, government, and the private sector. In the academic realm, she taught in the Geoscience Department at Mount Royal College in Calgary, Alberta, in the Geology Department at Montana Tech of the University of Montana, in Butte, Montana, and taught field camp in the Earth Sciences Department at Montana State University, Bozeman, Montana. She has also worked for the U.S. Forest Service in Wisdom, Montana, on forest lands mining claims, for the U.S. Geological Survey on the Survey’s assessment of mineral potential for wilderness candidate areas in southwestern Montana, and as a hydrogeologist for the Montana Department of Natural Resources and Conservation. In 1991, she started her own consulting company, Whitehall Geogroup, Inc. Her consulting work includes minerals assessment, hydrogeology, oil and gas, paleontological resource evaluation, and geologic mapping.

Dr. Charles Wideman

Dr. Charles Wideman received his undergraduate and graduate degrees in geophysics at the Colorado School of Mines, Golden Colorado. He taught in the geophysics department at Montana Tech of the University of Montana for many years. He has done numerous consulting projects in many aspects of geophysics and geology.