John W. Geissman
Ph.D., University of Michigan, 1980 (Emeritus Professor)
Office Rm 141 Northrop Hall, (505) 277-1641 or (505) 277-3433 Email: jgeiss@unm.edu
Research and Academic Interests:
Applications of paleomagnetism to geologic problems, particularly in orogenic belts (e.g., Western Cordillera of North America, eastern Himalaya syntaxis); geomagnetic field behavior; relations between rock magnetic properties and igneous and sedimentary processes; the great "battle": science vs. creationism.
List of Related Web Links:
UNM Paleomagnetism Laboratory
EPS490 Geologic Presentation Course Materials (Fall, 2001)
EPS101 The Way the Earth Works (Fall, 2002)
Listing of Recent Publications:
"Tilt and rotation of the footwall of a major normal
fault system: Paleomagnetism of the Black Mountains, Death Valley
extended terrane, California," Geological Society of
America Bulletin, v. 105, pp. 1373-1387, 1993 (with D.L.
Holm and B. Wernicke).
"Paleomagnetic record of a geomagnetic field reversal
from late Miocene mafic intrusions, southern Nevada," Science,
v. 266, p. 412-416, 1994 (with C.D. Ratcliff, F.V. Perry, B.M.
Crowe and P.K. Zeitler).
"Large-magnitude extensional deformation in the South
Mountains metamorphic core complex, Arizona: Evaluation with
paleomagnetism," Geological Society of America Bulletin,
v. 107, p. 877-894, 1995 (with R.F. Livaccari and S.J. Reynolds).
"Late Cretaceous remagnetization of Proterozoic mafic
dikes, southern Highland Mountains, southwestern Montana: A paleomagnetic
and 40Ar/39Ar study," Bulletin of the Geological Society
of America, v. 108, p. 653-668, 1996 (with S.S. Harlan, L.W.
Snee and R.L. Reynolds).
"Timing of deformation and accretion of the Antimonio
terrane, Sonora, from paleomagnetic data," Geology,
v. 24, pp. 1131-1134, 1996 (with R.S. Molina-Garza).
"Electron microscopy of iron oxides and implications
for the origin of magnetizations and rock magnetic properties
of Banded Series rocks of the Stillwater Complex, Montana,"
Journal of Geophysical Research, v. 102, in press, 1997
(with W. Xu, R. Van der Voo and R. Peacor).
"Paleomagnetic data bearing on style of Miocene deformation
in the Lake Mead area, southern Nevada," Journal of Structural
Geology, in press, 2000, (T.F. Wawrzyniec, J.W. Geissman,
R.E. Anderson and S.S. Harlan).
"Mechanism for accommodation of Miocene extension: Low-angle
normal faulting, magmatism, and secondary breakaway faulting
in the southern Sacramento Mountains, southeastern California,"
Tectonics, in press, 2000, (E. Campbell-Stone, B.E. John,
J.W. Geissman, D.A. Foster and R.F. Livaccari).