William Clyde

Assoc Dean Grad School-UNH
Phone: (603) 862-3148
Office: Earth Sciences, James Hall Rm 328, Durham, NH 03824
William Clyde

I am fundamentally interested in Earth history. I am particularly interested in how climate change, tectonics, and other geological forces have influenced mammalian evolution and shaped the terrestrial sedimentary record. Recently, I have been trying to understand the causes and consequences of Paleogene "hyperthermal" events. These are short-term, large-magnitude global warming events characterized by significant perturbations to the global carbon cycle that had wide ranging effects on continental and marine ecosystems. I use a multidisciplinary approach to address problems and have experience with a variety of paleontological and geological techniques, including magnetostratigraphy, phylogenetic analysis, morphometrics, and stable isotope geochemistry. I maintain a paleomagnetics lab at UNH and have worked throughout the Rocky Mountain region, as well as in Asia (Pakistan, Kazakhstan, China), Africa (Egypt, Tanzania), and South America (Argentina, Venezuela).

William Clyde serves as the Associate Dean of the Graduate School. He works to guide, manage and promote the Graduate School for the University and is a strong advocate for graduate education and our students on and off campus.


  • Ph.D., Geology/Earth Science, University of Michigan
  • M.S., Geology/Earth Science, University of Michigan
  • B.A., Geology/Earth Science, Princeton University

Research Interests

  • Geology
  • Magnetics
  • Paleobiology
  • Paleontology
  • Stratigraphy
  • Vertebrate Paleontology

Courses Taught

  • ESCI 400: Freshman Field Seminar
  • ESCI 530: Geological Field Methods
  • ESCI 652: Paleontology
  • ESCI 756/856: Geotectonics
  • ESCI 796/896: Topics/Iceland Field Trip
  • ESCI 896: Top/Paleomagnetism
  • ESCI 993: Advanced Seminar/Earth
  • INCO 590: Rsrch Exp/Earth Science
  • INCO 790: Adv Rsrch Exp/Earth Science

Selected Publications

Fuentes, A. J., Clyde, W. C., Weissenburger, K., Bercovici, A., Lyson, T. R., Miller, I. M., . . . Johnson, K. R. (2019). Constructing a time scale of biotic recovery across the Cretaceous–Paleogene boundary, Corral Bluffs, Denver Basin, Colorado, U.S.A.. Rocky Mountain Geology, 54(2), 133-153. doi:10.24872/rmgjournal.54.2.133

Lyson, T. R., Miller, I. M., Bercovici, A. D., Weissenburger, K., Fuentes, A. J., Clyde, W. C., . . . Chester, S. G. B. (2019). Exceptional continental record of biotic recovery after the Cretaceous–Paleogene mass extinction. Science, 366(6468), 977-983. doi:10.1126/science.aay2268

Currano, E. D., Pinheiro, E. R. S., Buchwaldt, R., Clyde, W. C., & Miller, I. M. (2019). Endemism in Wyoming plant and insect herbivore communities during the early Eocene hothouse. Paleobiology, 45(3), 421-439. doi:10.1017/pab.2019.18

Widlansky, S. J., Clyde, W. C., O'Connor, P. M., Roberts, E. M., & Stevens, N. J. (2018). Paleomagnetism of the Cretaceous Galula Formation and implications for vertebrate evolution. Journal of African Earth Sciences, 139, 403-420. doi:10.1016/j.jafrearsci.2017.11.029

Krause, J. M., Clyde, W. C., Ibañez-Mejía, M., Schmitz, M. D., Barnum, T., Bellosi, E. S., & Wilf, P. (2017). New age constraints for early Paleogene strata of central Patagonia, Argentina: Implications for the timing of South American Land Mammal Ages. Geological Society of America Bulletin, 129(7-8), 886-903. doi:10.1130/b31561.1

Roberts, E. M., Stevens, N. J., O’Connor, P. M., Dirks, P. H. G. M., Gottfried, M. D., Clyde, W. C., . . . Hemming, S. (2012). Initiation of the western branch of the East African Rift coeval with the eastern branch. Nature Geoscience, 5(4), 289-294. doi:10.1038/ngeo1432

Seiffert, E. R. (2005). Basal Anthropoids from Egypt and the Antiquity of Africa's Higher Primate Radiation. Science, 310(5746), 300-304. doi:10.1126/science.1116569

Bowen, G. J. (2002). Mammalian Dispersal at the Paleocene/Eocene Boundary. Science, 295(5562), 2062-2065. doi:10.1126/science.1068700

Fricke, H. C., Clyde, W. C., O'Neil, J. R., & Gingerich, P. D. (1998). Evidence for rapid climate change in North America during the latest Paleocene thermal maximum: oxygen isotope compositions of biogenic phosphate from the Bighorn Basin (Wyoming). Earth and Planetary Science Letters, 160(1-2), 193-208. doi:10.1016/s0012-821x(98)00088-0

Fricke, H. C., Clyde, W. C., & O’Neil, J. R. (1998). Intra-tooth variations in δ18O (PO4) of mammalian tooth enamel as a record of seasonal variations in continental climate variables. Geochimica et Cosmochimica Acta, 62(11), 1839-1850. doi:10.1016/s0016-7037(98)00114-8

Most Cited Publications