Di Keller | Colgate University - Faculty Directory Skip Navigation

Colgate Directory

Di Keller

Di Keller

Senior Lecturer in Geology
Geology , 339 Ho Science Center
p 315-228-7893

Science Affiliates Workshop Powerpoints

Rocks and Minerals cover
Fossils cover

NY Geology Cover

Ice ages cover


BA (1981), MA (1988), Colgate University

Teaching Specialties

Mineralogy, surficial geology, environmental geology

Research Interests

The Critical Zone, soil formation, impact of acid precipitation on soils, plant-soil interactions in the rhizosphere, forest decline, clay minerals and phyllosilicates


(*indicates student author)
  • April, R., Keller, D. and Hluchy, M., Soils and Soil Acidification in the Adirondack Mountains, 2016, in press, (invited paper, special issue) The Adirondack Journal of Environmental Studies, 21, 147-166.
  • Shale to soil: Geochemistry and clay mineral transformations. R.H. April, S. Lemon* & D. Keller, Mineralogical Magazine, 2011, Volume 75, Issue 3. Goldschmidt 2011. 
  • Clay mineral weathering in shales and soils in the critical zone, S. MacDonald*, R.H. April and D.M. Keller. Special edition of Geochimica et Cosmochimica Acta, Volume 74, Issue 11 Supplement 1 (A652), June 2010. 
  • April, R. H., Keller, D. M. and Driscoll, C., 2004, Smectite in Spodosols from the Adirondack Mountains of New York. Clay Minerals., v. 39: 99-113. 
  • April, R. H., and Keller, D., 1992, Saponite and vermiculite in amygdales of the Granby Basaltic Tuff, Connecticut Valley: Clays and Clay Minerals, v. 40, no. 1, 22-31. 
  • April, R.H., and Keller, D., 1990, Interactions between minerals and roots in forest soils: Sciences Geologiques Mem., no. 85, 89-98, Strasbourg, France. 
  • April, R.H., and Keller, D., 1990, Mineralogy of the rhizosphere in forest soils of the eastern United States: Biogeochemistry, v. 9, 1-18. 
  • Keller, D. and April, R.H., 1989, Biotite Weathering in Forest Soils from the Eastern United States, Clays and Clay Minerals, Vol. 37, No. 6, 605-607 
  • Kada, J., Heit, M., April, R.H., Miller, K., Keller, D., and Kuiper, J., 1989, Factors influencing the distribution and inventories of Cs-137 in fresh water lake sediments: Proceedings of the 7th International Conference on Heavy Metals in the Environment, Geneva, Switzerland, 12-15 September.