Prof. Marshak maintains a strong interest in geoscience education. He has authored or co-authored college textbooks in introductory geology, Earth Science, and structural geology, most of which are published by W.W. Norton & Company. He also has developed a MOOC (massive open online course) offered through Coursera.
Prof. Marshak's research involves structural geology, tectonics, and field geology. He has been involved in research projects in the Midcontinent, the Appalachians, and southeastern Brazil, and studies a variety of issues including: the development of tectonic structures and unconformities in cratons; the development of tectonic foliations in rocks; the formation of fold-thrust belts; and crustal evolution during the Precambrian.
- Ph.D. Columbia University
- M.S. University of Arizona
- A.B. Cornell University
- GEOL 100: Planet Earth
- GEOL 411: Structural Geology and Tectonics
- GEOL 415/GEOL 515: Field Geology
- GEOL 512: Geotectonics
- ESE 199: Future of Earth's Resources
- GEOL 511: Advanced Structural Geology
DeLucia, M. S., Murphy, B. S., Marshak, S., & Egbert, G. D. (2019). The Missouri High-Conductivity Belt, revealed by magnetotelluric imaging: Evidence of a trans-lithospheric shear zone beneath the Ozark Plateau, Midcontinent USA? Tectonophysics, 753, 111-123. https://doi.org/10.1016/j.tecto.2019.01.011
Marshak, S., Haq, S. S. B., & Sen, P. (2019). Ramp initiation in fold-thrust belts: Insight from PIV analysis of sandbox models. Journal of Structural Geology, 118, 308-323. https://doi.org/10.1016/j.jsg.2018.11.006
Barklage, M., Stein, S., Stein, C. A., Keller, G. R., Marshak, S., Hickman, J. B., ... Elling, R. P. (2018). BARSCOPE - EXTENDING EARTHSCOPE BETWEEN THE APPALACHIANS AND THE ROCKIES. Paper presented at Geological Society of America Annual Meeting, Indianapolis, United States. https://doi.org/10.1130/abs/2018AM-320443
Chen, C., Gilbert, H., Fischer, K. M., Andronicos, C. L., Pavlis, G. L., Hamburger, M. W., ... Yang, X. (2018). Lithospheric discontinuities beneath the U.S. Midcontinent – signatures of Proterozoic terrane accretion and failed rifting. Earth and Planetary Science Letters, 481, 223-235. https://doi.org/10.1016/j.epsl.2017.10.033
DeLucia, M. S., Guenthner, W. R., Marshak, S., Thomson, S. N., & Ault, A. K. (2018). Thermochronology links denudation of the Great Unconformity surface to the supercontinent cycle and snowball Earth. Geology, 46(2), 167-170. https://doi.org/10.1130/G39525.1