Skip to main content

Graduate Students

Timothy O’Brien

Timothy O’Brien

PhD Candidate
Faculty Mentor(s): John Tarduno

116 Hutchison Hall
Fax: (585) 244-5689

Research Overview

My general interests focus on the roughly coeval layered igneous intrusions emplaced during the Archean-Proterozoic, with particular emphasis on a series of layered intrusions collectively referred to as the Great Dyke in Zimbabwe, Africa.  This ~550 km long and ~3-11 km wide series of layered intrusions represents minimally altered Archean (~2.575 Ga) material from which I am working to obtain paleointensity data using a single silicate crystal technique.

Selected Publications


  • O'Brien, T., Tarduno, J., & Hofmann, A. (2014) Single Silicate Crystal Paleointensity Analyses of the ca. 2.575 Ga Great Dyke of Zimbabwe. 2014 AGU General Meeting, San Francisco, CA. (Talk)
  • O'Brien T., Kersten, K., Bursik, M., & Champion, D. (2013) Paleomagnetism: A geophysical tool for bedrock mapping and the assessment of fault kinematics in volcanic terrains, experience from Burney Spring Mountain, NE California. In 26th ¿Symposium on the Application of Geophysics to Engineering and Environmental Problems 2013, ¿Environmental and Engineering Geophysical Society, Curran Associates, Inc., Red Hook, NY, p. 515—522 (Poster)


  • EES 201 - Evolution of the Earth (TA - Spring 2014 & 2015)
  • EES 255/455 - Planetary Science: Geologic Evolution and Planetary Habitability (TA - Fall 2013)