Donald Oscar Doehring was born Sept. 8, 1935, in Milwaukee, Wisc.; he died Dec. 19 in Green Valley, Ariz.

He was a geologist, a professor, a consultant and an expert witness during his career, which spanned some thirty-five years. He enjoyed teaching geology at the introductory to Ph.D. level. His introductory-level course filled the largest classroom on the Colorado State University campus each semester for several decades. His hobbies included ham radio (K7DOD), travel, reading, geocaching, baking and making people laugh.

He advised 88 masters-level and 5 doctoral students. Also, he served as department head, acting dean and university mediation officer at Colorado State University. He is survived by his wife, Barbara Doehring of Green Valley, Ariz; his son, Frederick Doehring, wife Vicky Doehring and their children Josef Doehring and Gabrielle Doehring, of Sandy, Utah; and by his daughter Katherine Doehring Egan, husband Kevin Egan and their daughter Kate Egan, of Dallas, Texas.

Don devoted his life to teaching others. Whether it was lecturing to 400 undergraduate students or helping his son learn to fix the family car, he always took time to encourage and support his children and students. He passed his concern for providing for his family to his daughter, who he mentored in financial matters to great success. Don was a devoted and loving husband. He and his wife, Barbara, had 57 wonderful years together.

The family wishes to thank the wonderful professionals who took such good care of Don during his final year. At the risk of forgetting someone, this includes Dr. Porterfield and his staff with Arizona Oncology, Dr. Laguillo, Dr. Levine, and, in his final hours, the caring staff of Soulistic Hospice.

A celebration of Don’s Life will be held sometime in the Spring.

In lieu of flowers the family suggests donations to either the Green Valley Amateur Radio Club (c/o Bob Call, treasurer, 501 S. La Posada Circle, #195, Green Valley AZ, 85614) or Soulistic Hospice.