Geo 231, Field Methods: Fall 2013 teaching assistant
Geo 429, Field Geology: Summer 2013 teaching assistant
Geo 226, Minerals, Rocks and Resources: Spring 2013 teaching assistant
Geo 102 ,Physical Geology Lab: Fall 2012 teaching assistant
M.S., Geoscience Anticipated Graduation: Summer 2014
University of Montana, Missoula
Bachelor of Science, Geoscience May 2011
Bachelor of Science, Outdoor Education
Northland College—Ashland, Wisconsin
The Ruby Range, located in southwestern Montana, records key aspects of the assembly and stabilization of the Laurentian craton from the Archean to the Paleoproterozoic. Two major periods of tectonothermal activity have been documented within the basement exposures of southwestern Montana: 1) a high-temperature, high-pressure ~1.8 Ga metamorphic event that may record ocean basin closure and continent-continent collision, and 2) a more cryptic metamorphic event at ~2.5 Ga that may be related to rift activity or an older tectonic event. Within the Ruby Range, the P-T-t paths of these events have yet to be determined. Additionally, while historically considered entirely reworked Archean cratonic lithosphere, recent evidence suggests that the Ruby Range may include accreted Proterozoic lithosphere and/or passive margin sediments (O’Neill and Christiansen, 2002; Alcock and Muller, 2012).
My hypothesis is that the Ruby Range represents a mid-crustal window during continental assembly at ~1.8 Ga that will aid us in understanding Proterozoic tectonics and crustal evolution. A combination of structural mapping, metamorphic phase equilibria, and in situ monazite laser ablation split stream inductively coupled plasma mass spectrometry (LASS-ICPMS) petrochronology will: 1) determine the structural history and pressure-temperature (P-T) paths of metamorphic rocks within the Ruby Range, 2) place constraints on the timing of metamorphic events that have occurred in this region, 3) potentially confirm the presence of Proterozoic lithosphere and/or passive margin sediments in this region, and 4) use the P-T-t data to make estimates on the nature and timescales of Proterozoic tectonic processes. These data will result in an improved understanding of the metamorphic evolution of rocks in the Ruby Range as well as provide important constraints on the evolution of continental crust during the assembly of Laurentia.
Field of Study
Fitz, T., Mills, A., Wilson, K., Bodette, C., and Cramer, M., 2011, Institute on Lake Superior Geology Proceedings, 57th Annual Meeting, Ashland, WI, v. 57.
Fitz, T., Ojakangas, R., and Cramer, M., 2011, Geology of the Bayfield Peninsula: Keweenawan Bayfield Group and Pleistocene deposits, Institute on Lake Superior Geology Proceedings, 57th Annual Meeting, Ashland, WI, v. 57, part 2.
Kendall, J., Cramer, M., King, R., Furst, S., 2011, Geologic Map of Oregon Caves National Monument and Proposed Boundary Expansion.
Mills, A., Fitz, T., and Cramer, M., 2011, Geology of Copper Falls State Park, Institute on Lake Superior Geology Proceedings, 57th Annual Meeting, Ashland, WI, v. 57, part 2.
National Park Service, STAR Award August 2012
Northland College, Wallace C. Hitchcock Award April 2011
Northland College, Natural Sciences Award April 2011
Northland College, Dean’s Hall of Recognition May 2010
Wilderness First Responder, Aerie Backcountry Medicine Expiration: January 2015
Geological Society of America, member since 2010