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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

Specialties and Interests

Current Projects

Publications

(also see full vita)

Refereed Journals:

  1. 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.
  2. McCraw, D.J., Timmons, J.M., and Read, A.S., 2005, The New Mexico Bureau of Geology and Mineral Resources’ Preliminary Map Series: Expediting Dissemination of STATEMAP Geologic Map Data to the Public, Digital Mapping Techniques ‘05— Workshop Proceedings Edited by David R. Soller April 24-27, 2005 Baton Rouge, Louisiana, U.S. Geological Survey, Open-File Report 2005-1428, 274p. ABSTRACT
  3. Dehler, C. M., Elrick, M., Karlstrom, K. E., Smith, G. A., Crossey, L. J., and Timmons, J. M., 2001, Neoproterozoic Chuar Group (~800-742 Ma), Grand Canyon:  a Record of Cyclic Marine Deposition During Global Cooling and Supercontinent Rifting, Sedimentary Geology 141-142, p. 465-499.
  4. 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.
  5. Marshak, S., Karlstrom, K. E., Timmons, J. M., 2000, Inversion of Proterozoic extensional faults; an explanation for the pattern of Laramide and ancestral Rockies intracratonic deformation, United States, Geology, v. 28, no. 8, p. 735-738.
  6. Karlstrom, K. E., Bowring, S. A., Dehler, C. M., Knoll, A. H., Porter, S. M., Sharp, Z. D., Des Marais, D. J., Weil, A. B., Geissman, J. W., Elrick, M. B., Timmons, J. M., Keefe, K., Crossey, L. J., in press, The Chuar Group of the Grand Canyon: record of break up of Rodinia, associated change in the global carbon cycle, and ecosystem expansion by 740 Ma, Geology, v. 28, no. 7, p. 619-622.
  7. Andronicos, C.L., Karlstrom, K.E., Nyman, M.W., Kirby, E., and Timmons, J.M., 1999, Interactions of metamorphism, deformation, and plutonism in low-pressure, high-temperature metamorphic belts:  an example from the Mesoproterozoic Sandia Pluton, New Mexico, U.S.A.:  Journal of Metamorphic Geology, in press.

Books and Edited Volumes:

  1. Cather, S. M., Timmons, J. M., and Karlstrom, K. E., 2005, Regional Tectonic Inferences for the 1.4 Ga-Holocene lateral slip history of the Picuris-Pecos and related faults, Northern New Mexico: New Mexico Geological Society Guidebook, 56th Annual Field Conference, Geology of the Chama Basin, p. 93-104.
  2. Timmons, J.M., Karlstrom, K.E., and Sears, J., 2003, Geologic structure of the Grand Canyon Supergroup, in Beus, S. S., and Morales, M., eds., Grand Canyon Geology, second edition, Oxford Univ. Press, New York, NY | Museum of North. Arizona Press, p. 71-82.
  3. Timmons, J.M., Karlstrom, K.E., Kirby, E., 1995, Geology of the Monte Largo Hills area, New Mexico:  Structural and metamorphic study of the eastern aureole of the Sandia Pluton:  New Mexico Geological Society Guidebook, 46th Annual Field Conference, Santa Fe region, p. 227-232.

Geologic Maps:

  1. Aby, S., and Timmons, J.M., 2005, Geology of the El Valle 7.5-minute quadrangle, Rio Arriba, Taos, and Santa Fe Counties, New Mexico:  New Mexico Bureau of Geology and Mineral Resources, Open-file Geologic Map OF-GM 105, scale 1:24,000.
  2. Smith, G.A., Timmons, M., and Gaud, M., 2004, Preliminary geologic map of the Truchas 7.5-minute quadrangle, Rio Arriba and Santa Fe Counties, New Mexico:  New Mexico Bureau of Geology and Mineral Resources, Open-file Geologic Map OF-GM 84, scale 1:24,000.
  3. Ferguson, C.A., Timmons, J.M., Pazzaglia, F.J., Karlstrom, K.E., and Bauer, P.W., 1996 (last revised: 31 August 1999), Geology of the Sandia Park 7.5-minute quadrangle, Bernalillo and Sandoval Counties, New Mexico:  New Mexico Bureau of Mines and Mineral Resources, Open-file Geologic Map OF-GM 1, scale 1:24,000.

Abstracts:

  1. Timmons, J. M., Fletcher, K. E., Bloch, J. D., Karlstrom, K. E., Heizler, M. T., Gehrels, G., Bowring, S. A., and Crossey, L. J., The Mesoproterozoic Grand Canyon Unkar Group: a detailed record of intracratonic basin formation and deformation during Grenville-age orogenesis: Geological Society of America Abstracts with Programs, Vol. 37, No. 7, p. 494.
  2. Fletcher, K. E., Timmons, J. M., Karlstrom, K. E., Heizler, M. T., Gehrels, G., Crossey, L. J., and Bloch, J. D., Detrital zircon and muscovite geochronology from southwest USA Mesoproterozoic rocks: Geological Society of America Abstracts with Programs, Vol. 37, No. 7, p. 387.
  3. Osburn, G. R., Kelly, S. A., Kempter, K. A., Bauer, P. W., Timmons, J. M., and Linden, M. A., 2005, Geologic research in the Santa Fe National Forest, Jemez Mountains, New Mexico: Geological Society of America Abstracts with Programs, Vol. 37, No. 7, p. 176.
  4. Heizler, M.T., Karlstrom K.E., Timmons J.M., and Sanders R.E., 2005, Reactivation of Precambrian fault networks: A K-feldspar 40Ar/39Ar study: 15th annual Goldschmidt Conference, Moscow, Idaho, p. A293.
  5. Timmons, J. M., Karlstrom, K. E., Pederson, J., and Anders, M., 2005, Geologic Map of Eastern Grand Canyon, Arizona: documenting multi-phase Late Proterozoic deformation and Laramide reactivation in the southwestern United States: New Mexico Geological Society 2005 Annual Spring Meeting Proceedings Volume, p. 57.
  6. McCraw, D. J., Timmons, J. M., and Read, A. S., 2005, NMBG&MR’s Preliminary Map Series:  Expediting Dissemination of STATEMAP Geologic Map Data to the Public, Digital Mapping Techniques 2005, Baton Rouge, La.
  7. Heizler, M. T., Karlstrom, K. E., Shaw, C. A., Timmons, J. M., and Sanders, R. E., 2004, The evolution of Laurentia as documented by 40Ar/39Ar thermochronology studies, Geological Society of America Abstracts with Programs, Vol. 36, No. 5, p. 405.
  8. Fletcher, K.E., Heizler, M.T., Karlstrom, K. E., Timmons, J.M., Crossey, L.J., and Bloch, J.D., 2004, Provenance and Geochronology of Mesoproterozoic sedimentary rocks from across the southwest United States revealed by 40Ar/39Ar dating of detrital muscovites, Geological Society of America Abstracts with Programs, Vol. 36, No. 5, p. 405.
  9. Timmons, J. Michael, Heizler, Matt, and Karlstrom, Karl E., 2002, Proterozoic and Paleozoic ancestry of regional Laramide fault networks: using 40Ar/39Ar K-feldspar thermochronology to evaluate early cooling/exhumation histories across discrete fault zones, Geological Society of America Abstracts with Programs, v. 34, no. 6, p. 181.
  10. Crossey, L. J., Timmons, J. M., Karlstrom, K.E., Ashby, J. Rampe, J., Tyson, A., Johnson, S., Marshall, K., Dehler, C. M., Prave, T., 2001 Petrologic approaches to correlate Late Mesoproterozoic to Neoproterozoic stratigraphic successions in Western North America, Geological Society of America Abstracts with Programs, v. 33, n. 5.
  11. Timmons, J. M., Karlstrom, K. E., Heizler, M., Bowring, S., 2001, A synthesis from the Unkar Group of Grand Canyon, and inferences on late Mesoproterozoic intracratonic sedimentation and deformation in the Western U.S., Geological Society of America Abstracts with Programs Vol. 33, No. 5, p. 20.
  12. Heizler, M. T., Timmons, J. M., Karlstrom, K. E., 2000, Ancestry of the Ancestral Rocky Mountains, Geological Society of America Abstracts with Programs, v. 32, no. 7.
  13. Timmons, J.M. and Karlstrom, K.E., 1999, Multistage Proterozoic extension and establishment of the N-S and NW tectonic grains in the southwestern United States: Evidence from 1:12,000 mapping of the Grand Canyon Supergroup, Geological Society of America Abstracts with Programs, v. 31, n. 7, p. 177.
  14. Heizler, M.T., Karlstrom, K.E., and Timmons, J.M., 1999, Where have all the old micas gone?, New Mexico Geological Society, Proceedings Volume, 1999 Annual Meeting, p. 43.
  15. Timmons, J.M., Karlstrom, K.E., and Dehler, C.M., 1998, Structure and sedimentary tectonics of the Chuar basin and Butte fault, Grand Canyon: evidence for a Neoproterozoic ‘growth’ fault; Geological Society of America Abstracts with Programs, v. 30, n. 6. p. 38.
  16. Timmons, J.M., 1996, Evidence for 1.4 Ga metamorphism and deformation in the aureole of the Sandia Pluton, Monte Largo Hills Area, New Mexico, New Mexico Geological Society 1996 Annual Spring Meeting Proceedings Volume, p. 44.
  17. Timmons, J.M., Shuster, R.D., Karlstrom, K.E., 1995, Geology of the Monte Largo Hills area, New Mexico:  Structural and Metamorphic study of the eastern aureole of the Sandia Pluton:  GSA Abstracts with Programs, v.27, n. 3, p.90.

Thesis:

  1. Timmons, J. M., 1999, 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, Masters Thesis, University of New Mexico.

Dissertation:

  1. Timmons, J. M., 2004, Mesoproterozoic Tectonic evolution of southwestern North America: protracted intracratonic deformation, sedimentation, and differential exhumation in Grand Canyon and the Rocky Mountain Region, [Dissertation], University of New Mexico.

Public Outreach:

  1. Ilg, B.R., Bennett, J., Timmons, M., Pederson, J., 1998, From the birth of a continent to Glen Canyon Dam: A Grand Canyon Voyage: Geological Society of America GeoVenture, GSA Today, v.7, p. 8-9.
  2. Timmons, J.M., Karlstrom, K.E., Dehler, C.M., 2000, Grand Canyon Supergroup: six unconformities make one ‘Great Unconformity’ - a record of supercontinent assembly and disassembly; Boatman’s Quarterly Review, Grand Canyon River Guides.
  3. Grand Canyon River Guides training trip 1999, invited speaker on Grand Canyon Geology.

 

 

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