John Geissman

Professor and Program Head - Geosciences
Tags: paleomagnetism rock magnetism

Professional Preparation

Ph.D. - Geological Sciences
University of Michigan-Ann Arbor - 1980
M.S. - Geological Sciences
University of Michigan-Ann Arbor - 1976
B.S. - Geology
University of Michigan-Ann Arbor - 1973

Research Areas

Research and Teaching Interests

Over the past decade, while on the faculty at the University of New Mexico, I have taught field geology, structural geology, tectonics, exploration geophysics, geology of New Mexico, solid earth geophysics, paleomagnetism, scientific presentations, Earth history, and physical geology. Notably, working with a colleague at the University of New Mexico, I have developed and refined the field geology course into an outstanding and also demanding/rigorous field geology experience.  I also participate in the instruction of the University of Michigan’s summer field geology course.

My research interests include the structural evolution of highly extended parts of the Basin and Range Province in the western US, Triassic paleomagnetism and magnetostratigraphy and its bearing on Colorado Plateau rotation, Pennsylvanian/ Permian redbeds along the eastern and northern margin of the Colorado Plateau, deformation along the eastern margin of the eastern Himalayan syntaxis in Southeast Asia, Precambrian paleomagnetism in the western US, pseudotachylite formation, the emplacement of shallow level igneous bodies (e.g., laccoliths and regionally extensive sill complexes), and developing improved techniques to recognize subtle yet significant differences among populations of magnetized phases in rocks whose magnetic mineralogy is dominated by magnetite and/or maghemite.

Publications

Connell, S.D., Smith, G.A., Geissman, J., and McIntosh, W., 2011, Tectonic and limatic controls on Upper Cenozoic nonmarine depositional sequences, Albuquerque Basin, Rio Grande rift, north-central New Mexico, in Hudson, M.R., and Grauch, T., ed., New Perspectives on the Rio Grande Rift: From Tectonics to Groundwater, Boulder, Geological Society of America Special Paper, in press. 2011 - Publication
Zeigler, K.E., and Geissman, J.W., 2011, Magnetostratigraphic Compilation for the Upper Triassic Chinle Group of New Mexico: Implications for regional and global correlations: Geosphere, Geological Society of America, in press. 2011 - Publication
ucas, S. G., L. H. Tanner, et al. (2011). "Position of the Triassic-Jurassic boundary and timing of the end-Triassic extinctions on land: Data from the Moenave Formation on the southern Colorado Plateau, USA." Palaeogeography, Palaeoclimatology, Palaeoecology 302: 194-205. 2011 - Publication
Godinez-Urban, A., R. S. Molina-Garza, et al. (2011). "Paleomagnetism of the Todos Santos and La Silla Formations, Chiapas: Implications for the Opening of the Gulf of Mexico." Geosphere 7: 145-158. 2011 - Publication
Geissman, J. W., Holm, D. K., Harlan, S. S., and Embree, G., 2010, Paleomagnetic evidence for rapid, high temperature formation of large-scale rheomorphic structures in the upper Pliocene Huckleberry Ridge Tuff, east-central Idaho: Geology, v. 38, p. 263-266. 2010 - Publication
Naibert, T. J., Geissman, J. W., and Heizler, M., 2010, Magnetic fabric, paleomagnetic, and 40Ar/39Ar geochronologic data bearing on the emplacement of the Philipsburg Batholith, southwest Montana fold/thrust belt: Lithosphere, v. 2, p. 303-327. 2010 - Publication
Oliva-Urcia, B., Casas, A. M., Pueyo, E. L., Roman-Berdiel, T., and Geissman, J. W., 2010, Paleomagnetic evidence for dextral strike-slip motion in the Pyrenees during Alpine convergence: Tectonophysics, v. 494, p. 165-179. 2010 - Publication
Godinez-Urban, A., Molina-Garza, R. S., Geissman, J. W., and Wawrzyniec, T. F., 2010, Paleomagnetism of the Todos Santos and La Silla Formations, Chiapas: Implications for the Opening of the Gulf of Mexico, in Lawton, T. F., ed., Geosphere Special Issue, in press. 2010 - Publication
Lucas, S.G., Kozur, H., Donohoo-Hurley, L., Geissman, J.W., Weems, R.E., 2010, Timing of the end-Triassic extinctions on land: The Moenave Formation on the southern Colorado Plateau, USA, Palaeogeography, Palaeoclimatology, Palaeoecology, in press. 2010 - Publication
Donohoo- Hurley, L. L., Geissman, J. W., and Lucas, S. G., 2010, Magnetostratigraphy of the uppermost Triassic and lowest Jurassic Moenave Formation western United States: Correlation with strata in the United Kingdom, Morocco, Turkey, Italy, and eastern United States: Bulletin of the Geological Society of America, v. 122, p. 2005-2019. 2010 - Publication

Appointments

Editor
Bulletin of the Geological Society of America [1995–2000]
Professor of Earth and Planetary Sciences
University of New Mexico [1993–2010]
Associate Professor
University of New Mexico [1987–1993]
Assistant Professor
University of New Mexico [1984–1987]
Assistant Professor
University of New Mexico [1980–1984]
Research Associate and Lecturer
University of Toronto [1978–1980]
Graduate Student
University of Michigan, Ann Arbor [1974–1979]

Awards

Distinguished Service Award - Geological Society of America [2002]
Fellow - American Geophysical Union

Additional Information

Professional Memberships
  •  Geological Society of America (Fellow)
  •  American Geophysical Union (Fellow)
  •  Sigma Xi
  •  New Mexico Geological Society
  •  New Mexicans for Science and Reason.
Awards and Fellowships
  •  Fellow, Geological Society of America; 1995
  •  Distinguished Service Award, GSA, 2002
  •  Fellow, American Geophysical Union, 2006
Invited talks/presentations
  •  University of Utah
  •  Rice University
  •  University of Michigan
  •  University of Texas-El Paso
  •  Idaho State University
  •  New Mexico Tech
  •  University of Kansas
  •  Basin and Range Workshop, Reno
  •  Colorado Scientific Society
  •  Rocky Mountain Association of Geologists
  •  Albuquerque Geological Society
  •  University of New Orleans
  •  New Mexico State University
  •  University of Arizona
  •  University of Wyoming
  •  University of Houston
  •  Arizona State University
  •  California Institute of Technology
  •  Evolution Conference, Lawrence, Kansas
  •  University of Idaho
  •  Northern Arizona University
  •  Lehigh University
  •  Bryn Mawr University
  •  University of Wisconsin
  •  North Carolina University
  •  University of Colorado
  •  Northern Illinois University

News Articles

Prof Selected to Lead Geological Society of America
Dr. John Geissman, professor in the UT Dallas Department of Geosciences, has been named president of the Geological Society of America. He began his one-year term July 1. Geissman joined UT Dallas last year. His research interests include paleomagnetism and tectonics. “The opportunity for constructive cooperation among all professional geoscience organizations has never been greater,” Geissman said of his appointment. “GSA must continue to play a vibrant role in this mission, by first and foremost fostering a strong, energetic, and visible professional organization for its members and translating our importance to society.” He will address the GSA annual meeting in Minneapolis, Minn., this fall. The organization, established in 1888, encourages earth scientists to share their findings about the study of the planet.
Findings Rock Long-Held Assumptions about Ancient Mass Extinction
New evidence gathered from the Karoo Basin in South Africa sheds light on a catastrophic extinction event that occurred more than 250 million years ago and wiped out more than 90 percent of life in Earth’s oceans and about 70 percent of animal species on land.

In research to be presented Wednesday at the annual meeting of the Geological Society of America and published in the October issue of the journal Geology, a University of Texas at Dallas geologist and his colleagues describe new findings that challenge the currently accepted model of the “Great Dying” and how it affected land animals. That event occurred at the end of the Permian geologic period. 
Findings Rock Long-Held Assumptions about Ancient Mass Extinction
New evidence gathered from the Karoo Basin in South Africa sheds light on a catastrophic extinction event that occurred more than 250 million years ago and wiped out more than 90 percent of life in Earth’s oceans and about 70 percent of animal species on land.

In research to be presented Wednesday at the annual meeting of the Geological Society of America and published in the October issue of the journal Geology, a University of Texas at Dallas geologist and his colleagues describe new findings that challenge the currently accepted model of the “Great Dying” and how it affected land animals. That event occurred at the end of the Permian geologic period.