Harold G. Coffin got his Ph.D. from the University of Southern California in 1969. One of his more critical works was unraveling the story of the Yellowstone National Park "Fossil Forests" which led him to be the first scientist to enter the area of Spirit Lake. He is currently conducting field work on the geology of the Pacific Northwest and revising a book on the science of religion.
Harold Coffin is a Seventh-day Adventist and was on staff with the Earth History Research Center, at Southwestern Adventist University, where he served in the fields of paleobotany and sedimentology. He was a member of Geoscience Research Institute and also served as staff editor of Geoscience Reports, a journal published by the same institute. He passed away on April 25, 2015 at the age of 89.
- The Spirorbis Problem by Harold G. Coffin. Origins 2(1):51-52 (1975).
- Coal: How Did it Originate? journal entry-An International Journal of Faith, Thought and Action
- The Organic Levels of YellowStone Petrified Forest by Harold Coffin. Origins 6(2):71-82 (1979).
- Catastrophism in the Pacific Northwest: A Geoscience Research Institute Field Guide by Harold G. Coffin and Elaine G. Kennedy
- Mount St. Helens and Spirit Lake by Harold G. Coffin. Origins 10(1):9-17 (1983).
- Origin by design Vol.983 book by Harold Coffin, Robert H. Brown, R. James Gibson.
- Coffin, Harold G. 1971. Vertical flotation of Horsetails (Equisetum): geological implications. Geological Society of America Bulletin 82:2019-2022.
- Coffin HG. 1987. Sonar and scuba survey of a submerged allochthonous "forest" in Spirit Lake, Washington. Palaois 2:179-180.
- Coffin HG. 1983. Erect floating stumps in Spirit Lake, Washington. Geology 11:198-199.
- Coffin HG. 1976. Orientation of trees in the Yellowstone Petrified Forests. Journal of Paleontology 50:539-543.