Recent Publications

Williams, M.L. and Jercinovic, M. J., 2002, Microprobe Monazite Geochronology: Putting Absolute Time into Microstructural Analysis. Journal of Structural Geology, v.24, p. 1013-1028.

Mahan, K.H., Williams, M.L., Baldwin, J.A., and Bowring, S.A., 2001, Juxtaposition of Deep Crustal and Middle Crustal rocks across the Legs Lake shear zone in northern Saskatchewan: in Summary of Investigations 2001, Volume 2, Saskatchewan Geological Survey, Sask. Energy Mines, Misc Rep. 2001 -4-2. {PDF File}

Shaw, C.A., Karlstrom, K.E., Williams, M.L., Jercinovic, M.J., and McCoy, A.M. (2001), Electron Microprobe Monazite Dating of ca. 1.7-1.63 and ca. 1.45-1.38 Ga deformation in the Homestake shear zone, Colorado: Origin and early evolution of a persistent intracontinental tectonic zone, Geology, v. 29, p.739-742.

Karlstrom, K.E., Ahaell, K., Harlan, S.S., Williams, M.L., McLelland, J., Geissman, J.W., and 2001, Long-lived (1.8-0.8 Ga) convergent orogen in southern Laurentia, its extensions to Australia and Baltica, and implications for refining Rodinia, Precambrian Research, v. 111, p. 5-30.

Williams,M. L., Scheltema,K., and Jercinovic, M. J., 2001, High-Resolution Compositional Mapping of Matrix Phases: Implications for Mass Transfer during Crenulation Cleavage Development in the Moretown Formation, Western Massachusetts, Journal of Structural Geology, v.23, p.923-939.

Hanmer, S., and Williams, M.L., 2001, Targeted fieldwork in the Daly Bay Complex, Hudson Bay, Nunavut. Geological Survey of Canada, Current Research, 2001-c15, 24p.

Williams, M. L., Melis, E.A., Kopf, C., and Hanmer, S., 2000, Microstructural Tectonometamorphic Processes and the Development of Gneissic Layering: A Mechanism for Metamorphic Segregation, Journal of Metamorphic Geology, v.18, p. 41-57.

Francis, C. A., Dyer, M. D., and Williams, M. L.,, and Hughes, J.M., 1999. The occurrence and crystal structure of foitite from A tungsten-bearing vein at Copper Mountain, Taos County, New Mexico. Canadian Mineralogist, v.37, p.1431-1438.

Williams, M.L., Jercinovic, M.J., Terry, M.P, 1999. Age Mapping and Chemical Dating of Monazite Using the Electron Microprobe: Deconvoluting Multistage Tectonic Histories. Geology. v.27, p. 1023-1026.

Karlstrom, K.E., Harlan, S.S., Williams, M.L., McLelland, J., Geissman, J.W., and Ahaell, K., 1999. Refining Rodinia: Geologic Evidence for the Australia Western U.S. (AUSWUS) connection for Proterozoic Supercontinent Reconstructions. GSA Today, v.9, n.10, October, 1999.

Williams, M. L., Karlstrom, K. E., Lanzirotti, A., Read, A. S., Bishop, J. L., Lombardi, C. E., Pedrick, J. N., and Wingsted, M. B., 1999, New Mexico Middle Crustal Cross Sections: 1.65 Ga macroscopic geometry, 1.4 Ga thermal structure and continued problems in understanding crustal evolution: Rocky Mountain Geology, v.34, p.53-56.

Johnson, S. E., and Williams, M. L., 1998, Determining finite longitudinal strains from opositely-concave microfolds in and around porphyroblasts: A new quantitative method, Journal of Structural Geology, v.20, p. 1521-1530.

Karlstrom, K. E., and Williams, M. L., 1998, Heterogeneity of the middle crust: Implications for strength of continental lithosphere: Geology, v.26, No. 9, p. 815-818.

Williams, M.L., and Karlstrom, K.E., 1996, Looping P-T paths, high-T, low-P middle crustal metamorphism: Proterozoic evolution of the southwestern United States, Geology, v.24, p.1119-1122.

Hawkins, D.P., Bowring, S.A., Ilg, B., Karlstrom, K.E., and Williams, M.L., 1996,U-Pb geochronological constraints on Paleoproterozoic crustal evolution, Upper Granite Gorge, Grand Canyon, Arizona. Geological Society of America Bulletin.

Ilg, B., Karlstrom, K.E., Hawkins, D., and Williams, M.L. 1996, Tectonic history of Paleoproterozoic rocks in the Grand Canyon, Arizona. Geological Society of America Bulletin.

Williams, M.L. and Bauer, P.W., 1996, The Copper Hill mineral deposit, Picuris Range, New Mexico: Retrograde mineralization in a brittle-ductile trap. Economic Geology, v.90, p. 1994-2005.

Snoeyenbos, D.R., Williams, M.L., and Hanmer, S., 1995, Archean high-pressure metamorphism in the western Canadian Shield. European Journal of Mineralogy, v.7, p. 1251-1272.

Daniel, C.G., Karlstrom, K.E., Williams, M.L., and Pedrick, J.N., 1995, The reconstruction of a middle Proterozoic orogenic belt in north-central New Mexico: New Mexico Geological Society Guidebook, 1995.

Williams, M.L., Hanmer, S.K., Kopf, C., and Darrach, M., 1995, Syntectonic generation and segregation of tonalitic melts from amphibolite dikes in the lower crust, Striding-Athabasca mylonite zone, northern Saskatchewan. Journal of Geophysical Research v. 100, B8, p. 15717-15734.

Hanmer, S., Williams, M.L., and Kopf, C., 1995. Striding-Athabasca mylonite zone: implications for the Archean and early Proterozoic tectonics of the western Canadian Shield. Canadian Journal of Earth Sciences, v.32, p.178-196.

Hanmer, S., Williams, M.L., and Kopf, C., 1995, Modest movements, spectacular fabrics in an intracontinental deep-crustal strike-slip fault: Striding-Athabasca mylonite zone, NW Canadian Shield. Journal of Structural Geology, v.17, p.493-507.

Karlstrom, K.E., and Williams, M.L., 1995, The case for synchronous deformation, metamorphism, and plutonism in the Crazy Basin area, central Arizona. Journal of Structural Geology, v.17, p.59-81.

Hanmer, S., Kopf, C., Parrish, R., and Williams, M.L., 1994, Striding-Athabasca mylonite zone: I. Complex Archean deep crustal deformation in the East Athabasca mylonite triangle, N. Saskatchewan. Canadian Journal of Earth Sciences, v.31, p.1287-1300.

Bauer, P.W. and Williams, M.L., 1994, Late tectonic intrusion in the Magdalena Mountains: Evidence for Early Proterozoic Deformation in central New Mexico. Precambrian Research 67, p. 349-356.

Williams, M.L. and Burr, J.L., 1994, Preservation and evolution of quartz phenocrysts in deformed rhyolites from the Proterozoic of Southwestern North America, Journal of Structural Geology, v.16, p.203-221.

Williams, M.L., 1994, Sigmoidal inclusion trails, punctuated fabric development, and interactions between metamorphism and deformation. Journal of metamorphic Geology, v. 12, p.1-21.

Robertson, J.M., Grambling, J.A., Mawer, C.K., Bowring, S.A., Williams, M.L., Bauer, P.W., and Silver, L.T., 1993, Precambrian Geology of New Mexico. in: Reed, J.C., Bickford, M.E., Houston, R.S., Link, P.K., Rankin, D.W., Sims, P.K., and Van Schmus, W.R., (eds.) Precambrian: Conterminous U.S. Geological Society of America, Decade of North American Geology, v.C2, p.228-238.

Seaman, S.J., and Williams, M.L., 1992, Center-to-center analysis and flow direction determination in ash-flow tuffs. Bulletin of Volcanology, v.54, p.319-328.

Williams, M.L., 1991, Overview of Early Proterozoic Metamorphism in Arizona. In Karlstrom, K.E. (ed.), Proterozoic Geology and Ore Deposits of Arizona, Arizona Geological Society Digest 19, p.11-26.

Darrach, M., Karlstrom, K.E., Argenbright, D.N., and Williams, M.L., 1991, Progressive deformation an the Early Proterozoic Shylock shear zone, central Arizona. In Karlstrom, K.E. (ed.), Proterozoic Geology and Ore Deposits of Arizona, Arizona Geological Society Digest 19, p.97-116.

Seaman, S.J., McIntosh, W.C., Williams, M.L., Geissman, J.W., and Elston, W.E., 1991, Magnetic fabrics of the Bloodgood Canyon and Shelly Peak Tuffs, southwestern New Mexico: Implications for emplacement and alteration processes. Bulletin of Volcanology, v.53, p. 460-476.

Williams, M.L., 1991, Heterogeneous deformation in a ductile fold-thrust belt: the Proterozoic tectonic history of the Tusas Mountains, New Mexico, Geological Society of America Bulletin, v.103, p.171-188.

Williams, M.L., and Grambling, J.A., 1990, Manganese, ferric iron, and the equilibrium between garnet and biotite. American Mineralogist, v.75, no.7-8, p.886-908.

Bauer, P.W., and Williams, M.L., 1989, Stratigraphic nomenclature of Proterozoic rocks, northern New Mexico- revisions, redefinitions, and formalization. New Mexico Geology, v.11, p.45-52.

Grambling, J.A., Williams, M.L., Smith, R.F., and Mawer, C.K., 1989, The role of crustal extension in the metamorphism of Proterozoic rocks in northern New Mexico. in Grambling, J.A., and Tewksbury, B.J., Proterozoic Geology of the Southern Rocky Mountains, Geological Society of America Special Paper 235, p.87-110.

Grambling, J.A., Williams, M.L., Mawer, C.K., and Smith, R.F., 1989, Metamorphic Evolution of Proterozoic rocks in New Mexico, In Daly, J.S., Cliff, R.A., and Yardley, B.W. (eds) 1989 Evolution of Metamorphic Belts, Geological Society Special Publication 43, p. 461-467.

Grambling, J.A., Williams, M.L., and Mawer, C.K., 1988, Proterozoic tectonic assembly of New Mexico. Geology, v.16, p.724-727.

Grambling, J.A., and Williams, M.L., 1985, The effects of Fe3+ and Mn3+ on aluminum silicate phase relations in northcentral New Mexico, U.S.A. Journal of Petrology, v.26, p.324-354.