Jason F. Thomason, Ph. D.
Geologist
Geologic Mapping and Hydrogeology Center
207 Natural Resources Building
615 E. Peabody Drive
Champaign, IL 61820
Phone: 217-244-2508 •
Fax: 217-244-2785
E-mail: thomason@isgs.illinois.edu

Research Interests
- Quaternary Geology Staff Page
- Glacial stratigraphy and sedimentology
- Laboratory and field studies of subglacial processes
- Geologic mapping of glaciated terrains

Current Projects
- Surficial mapping in Lake County, IL
- 3D mapping/modeling of glacial deposits in Lake County, IL
- Geology of Big River State Forest, IL

Selected Publications
Abstracts
Thomason, J.F. and N.R. Iverson, 2005, A laboratory and field
study of the microstructural strain signature of a basal till, Lake
Michigan Lobe, North Central GSA Minneapolis Abstracts with Programs,
North Central GSA Minneapolis Abstracts with Programs, 37(5), 27.
Hooyer, T.S., D. Cohen, N.R. Iverson, J.F. Thomason, and M.
Jackson, 2005, A quarrying experiment beneath a thick valley glacier:
role of transient water pressure North Central GSA Minneapolis with
Programs, 37(5), 27.
Thomason, J.F. and N.R. Iverson, 2004, Clast plowing as a
potential flow instability for soft-bedded glaciers, Eos Trans. AGU
Fall meeting, 85(47), no. 327.
McLoughlin, M., N.R. Iverson, J.F. Thomason, and T.S. Hooyer,
2003, Determination of the microfabric of sheared till using high
resolution X-Ray texture goniometry, GSA Seattle Abstracts with
Programs, 35 (6), 299.
Thomason, J.F., and D.H. Malone, 2000, Geology of the Starved
Rock, IL 7.5 Minute Quadrangle: North Central GSA Indianapolis
Abstracts with Programs, 32 (5), 19.
Publications
Thomason, J.F. and N.R. Iverson, 2006, Microfabric and
microshear evolution in deformed till, Quaternary Science Reviews,
25, 1027-1038.
Cohen, D., T.S. Hooyer, N.R. Iverson, J.F. Thomason, and M.
Jackson, 2006, Role of transient water pressure in quarrying: A
subglacial experiment using acoustic emissions, Journal of Geophysical
Research-Earth Surface, 111, F03006, doi: 10.1029/2005JF000439.
Hooyer, T.S., N.R. Iverson, F. Lagroiz, and J.F. Thomason, in
review, Journal of Geophysical Research-Earth Surface, The development
of magnetic fabric in sheared till.
Thomason, J.F. and N.R. Iverson, in review, Journal of
Glaciology, A laboratory study of particle ploughing and pore-pressure
feedback: A velocity weakeing machanism for soft glacier beds.
J.F. Thomason and N.R. Iverson, in preparation for submittal to
Quaternary Science Reviews, Genesis of the Batestown till, Lake
Michigan Lobe, from magnetic fabric and sand-particle fabric analyses.
Thomason, J.F., and D.H. Malone, 2000, Surficial Geologic Map of
the Starved Rock, IL 7.5 Minute Quadrangel, USGS EDMAP.
Ordering information
for Illinois State Geological Survey Publications
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