J. Michael Timmons

Geologic Mapping Program Manager

New Mexico Bureau of Geology & Mineral Resources
New Mexico Tech
801 Leroy Place
Socorro NM 87801-4796

(575) 835-5237
(575) 835-6333 fax

J. Michael Timmons is a geologist and Program Manager of the Geologic Mapping Program (STATEMAP) at the Bureau. During his undergraduate studies at the University of Nebraska at Omaha, Mike first came to New Mexico in 1994 to map east of Albuquerque in the Sandia Park quadrangle.  After finishing his undergraduate studies in 1995, Mike moved to Albuquerque for graduate work at the University of New Mexico.  At UNM, Mike worked on the Late Neoproterozoic sedimentary rocks of the Chuar Group in Grand Canyon during his masters thesis studies.  Later during his dissertation studies, he worked on the Late Mesoproterozoic Unkar Group of the Grand Canyon and received a Ph.D. in geology in May, 2004.  Mike and his wife (Stacy Timmons) live in Socorro.

Education

  • Ph.D., 2004, Geology, University of New Mexico, Dissertation: "Mesoproterozoic Tectonic evolution of southwestern North America: protracted intracratonic deformation, sedimentation, and differential exhumation in Grand Canyon and the Rocky Mountain Region"
  • M.S., 1999, Geology, University of New Mexico, Thesis: "Proterozoic multistage (~1.1 and ~0.8 Ga) extension in the Grand Canyon Supergroup and establishment of northwest and north-south tectonic grains in the southwestern United States"
  • B.S., 1995, Geology, University of Nebraska at Omaha

Specialties and Interests

  • Field geology
  • Structural geology
  • Grand Canyon Geology
  • Mid-Late Proterozoic Geology of North America
  • Basement cooling histories determined from 40Ar/39Ar thermochronologic studies
  • Proterozoic ancestry of Phanerozoic deformational structures in the Southwest
  • Brittle structural history of the southern Sangre de Cristo Mountains, New Mexico
  • Ancestral Rocky Mountain deformation in New Mexico and Colorado
  • Proterozoic geology of New Mexico, with emphasis on structure and tectonics
  • Applied sedimentology to structural problems in sedimentary rocks

Current Projects

  • STATEMAP Program activities
  • Training astronauts with NASA
  • Geometry and kinematics of faults in the southern Sangre de Cristo Mountains, New Mexico.
  • Timing of Proterozoic deformation and plutonism in the Northern Truchas Peaks, New Mexico.
  • Advances in Understanding the Geology of Eastern Grand Canyon: results from recent 1:24,000 mapping in Grand Canyon, Grand Canyon Association Monograph.

Selected References

(see Curriculum Vitae for a complete listing)

Refereed Journals:

  1. Kinzli, K., Shafike, N., Bauer, P., Lundahl, A., Schmidt Petersen, R., Harris, S., Lewis, G., Johnson, P., and Timmons, J.M., 2013, Quantifying river accretion in the upper Rio Grande gorge, New Mexico, by using an acoustic Doppler current profiler, River Research and Applications, Vol. 29, Issue 1, pp. 4-16.
  2. Gehrels, G. E,,  Blakey, R., Karlstrom, K. E.,  Timmons, J. M., Dickinson, B., and Pecha, M., 2011, Detrital zircon U-Pb geochronology of Paleozoic strata in the Grand Canyon, Arizona, Lithosphere, v. 3, n. 3, pp. 183-200.
  3. Bloch, J. D., Timmons, J. M., Crossey, L. J., Gehrels, G. E., and Karlstrom, K. E., 2006, Mudstone petrology of the Mesoproterozoic Unkar Group, Grand Canyon: Provenance, weathering, and sediment transport on intracratonic Rodinia, Journal of Sedimentary Research, 76, pp. 1106-1119.
  4. Cather, S. M., Read, A. S., Krainer, K., Kelley, S. A., Kues, B. S., Allen, D. B., Timmons, J. M., 2007, Analysis of proximal syntectonic Pennsylvanian deposits yields definitive evidence of major Phanerozoic slip on Picuris-Pecos Fault, north-central New Mexico, New Mexico Geology, Vol. 29, Issue 2, pp. 57.
  5. Cather, S. M., Karlstrom, K. E., Timmons, J. M., and Heizler, M. T., 2006, A Palinspastic Reconstruction of Proterozoic basement-related aeromagnetic features in north-central New Mexico: Implications for Mesoproterozoic to Late Cenozoic tectonism, Geosphere, v. 2; no. 6; pp. 299-323.
  6. Timmons, J. M., Karlstrom, K. E., Heizler, M. T., Bowring, S. A., Gehrels, G. E., and Crossey, L. J., 2005, Tectonic inferences from the ca. 1254 -1100 Ma Unkar Group and Nankoweap Formation, Grand Canyon: Intracratonic deformation and basin formation during protracted Grenville orogenesis, Geological Society of America Bulletin, v.117, no.11/12, p. 1573-1595.
  7. Timmons, J.M., Karlstrom, K.E., Dehler, C.M., Geissman, J.W., and Heizler, M.T., 2001, Proterozoic multistage (~1.1 and ~0.8 Ga) extension in the Grand Canyon Supergroup and establishment of northwest and north-south tectonic grains in the southwestern United States, Geological Society of America Bulletin, v. 113, no. 2, p163-180.

Books and Edited Volumes:

  1. Zeigler, K., Timmons, J.M., Timmons, S.S., Semken, S., 2013, Geology of Route 66 Region: Flagstaff to Grants: New Mexico Geological Society Guidebook, 64th Annual Field Conference, 117 pp.
  2. Timmons, J. M. and Karlstrom K. E. eds., 2012, Grand Canyon Geology: Two Billion Years of Earth’s History, Geological Society of America Special Paper 489.
  3. Timmons, J.M., Bloch, J.D., Fletcher, K.E., Karlstrom, K.E., Heizler, M.T., Gehrels, G., Crossey, L.J., 2012, The Grand Canyon Unkar Group: Mesoproterozoic basin formation in the continental interior during supercontinent assembly, in Timmons, J. M. and Karlstrom K. E. eds., Grand Canyon Geology: Two Billion Years of Earth’s History, Geological Society of America Special Paper 489.
  4. Dehler, C.M., Porter, S., and Timmons, J.M., 2012, The Neoproterozoic Earth System Revealed From the Chuar Group of Grand Canyon, in Timmons, J. M. and Karlstrom K. E. eds., Grand Canyon Geology: Two Billion Years of Earth’s History, Geological Society of America Special Paper 489.
  5. Karlstrom, K. E. and Timmons, J. M., 2012, Many Unconformities make one Great Unconformity, in Timmons, J. M. and Karlstrom K. E. eds., Grand Canyon Geology: Two Billion Years of Earth’s History, Geological Society of America Special Paper 489.
  6. Karlstrom, K. E. and Timmons, J. M., 2012, Faulting and Uplift in the Grand Canyon Region, in Timmons, J. M. and Karlstrom K. E. eds., Grand Canyon Geology: Two Billion Years of Earth’s History, Geological Society of America Special Paper 489.

Geologic Maps:

  1. Timmons, J. M., and Cikoski, C. T., 2012, Geologic map of the San Rafael quadrangle, Cibola County, New Mexico:  New Mexico Bureau of Geology and Mineral Resources, Open-file Geologic Map 232, scale 1:24,000.
  2. Timmons, J. M., 2010, Geologic map of the Nelson Canyon West Quadrangle, Lincoln County, New Mexico: New Mexico Bureau of Geology and Mineral Resources, Open-file Geologic Map OFGM 197, scale 1:24,000.
  3. Timmons, J. M., 2008, Geologic Map of the Flying H NW 7.5-minute quadrangle, Lincoln and Chaves Counties, New Mexico:  New Mexico Bureau of Geology and Mineral Resources, Open-file Geologic Map OFGM 173, scale 1:24,000.
  4. Timmons, J. M., Karlstrom, K.E., Pederson, J., and Anders, M., 2007, Geologic Map of the Butte Fault / East Kaibab Monocline Area, Eastern Grand Canyon, Arizona, Grand Canyon Association, 1:24,000.