Mary Kate Fidler

PhD 2017

Office Location

Webb 1049


Character and significance of volcanism in the lower Colorado River extensional corridor; insight into extensional tectonics

Research Area
Structural Geology, Tectonics, Volcanology, Igneous Petrology

Phil Gans



Harry Glicken Memorial Graduate Fellowship, 2012/13

Graduate Opportunity Award, 2013/14

Preston Cloud Award, 2013/14

Global Travel Field Fund, 2013/14


My research at UCSB focuses on the relationship between extension and magmatism in the Whipple Mountains of California.  This area of the Lower Colorado River Extensional Corridor has been subject to rapid crustal extension (unroofing a metamorphic core complex) as well as extensive volcanism.  I am employing several geochronologic techniques in concert with detailed geologic mapping in order to constrain the timing relationship between these two processes, determining eruption rates before, during, and after peak extension.  The petrologic character of the volcanic units will also be explored in order to determine the sources of melt and hypothesize as to the cause of extension in the area.


Ohlin, C. A., Harley, S. J., McAlpin, J. G., Hocking, R. K., Mercado, B. Q., Johnson, R. L., Villa, E. M., Fidler, M. K., Olmstead, M. M., Spiccia, L., Britt, R. D. and Casey, W. H. (2011), Rates of Water Exchange for Two Cobalt(II) Heteropolyoxotungstate Compounds in Aqueous Solution. Chemistry – A European Journal, vol. 17: pg. 4408–4417.


Earth 3: Historical Geology (Teaching Assistant), S13

Earth 6: Mountains, Boots, & Backpacks (Teaching Assistant), F14

Earth 7: Dinosaurs (Teaching Assistant), F12

Earth 30:  History of Life (Teaching Assistant), W14

Earth 103: Structural Geology (Teaching Assistant), W13/W15

Earth 118/119:  Summer Field Geology (Teaching Assistant), M14

Earth 177: Ore Deposits & Mineral Resources (Teaching Assistant), F14

Earth 185: Physical Volcanology (Teaching Assistant), S15