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Interim Dept. Chair Email: jatullis@uark.edu
216 Gearhart Hall
University of Arkansas
Fayetteville, AR 72701P
479-575-3355
F 479-575-3469
Dr. Jill Marshall
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Assistant Professor of Geology
GEAR 116
Department of Geosciences
University of Arkansas
Fayetteville, AR 72701
Phone: 479-575-2420
FAX: 479-575-3469
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Degrees |
Ph.D. University of Oregon, Geosciences, 2015
M.S. San Francisco State University, Geosciences, 2009
B.S. California State University Hayward, Earth and Environmental Sciences, 1994
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Research Interests |
Dr. Marshall is a geomorphologist and Critical Zone scientist. The Critical Zone is
the life-sustaining, constantly evolving, surface and near-surface earth region extending
from the top of the vegetative canopy where it intersects with the atmosphere to the
subsurface limit of groundwater.
Her research delves deeply into the role of biota, climate and lithology (or more
specifically rock properties) in determining the rates and styles of geomorphic processes
through time. Broadly, her current work centers on two overlapping themes: 1) how
variations in rock properties and climate-mediated changes in processes (such as bedrock
weathering via trees vs. frost) control the rates and style of landscape evolution
and 2) dis-entangling the legacy of Pleistocene glacial intervals in regions that
remained unglaciated during cold intervals. She has a particular interest in how past
processes shape modern sub-surface architecture (e.g. fracturing and porosity) of
the Critical Zone as the physical architecture supports diverse functions such as
hydrologic routing, net primary productivity, carbon and water storage, and mineral
supplies for the geochemical reactor.
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Applied Environmental Geoscience |
Before returning to school for her PhD, Dr. Marshall worked for several decades on
applied problems in water quality, with a focus on watershed and stream studies, and
restoration design. As a stream specialist for the State of California, she pioneered
the development of stream protection policies, developed stream monitoring and restoration
trainings for both urban and rural communities, led studies on mercury transport in
rivers, designed effective mercury containment projects at an abandoned mercury mine
and developed water quality standards to protect fish-eating birds and humans from
ill health effects due to eating mercury- contaminated fish. She is looking forward
to learning more about the wonderful Arkansas waterways and exploring feedbacks between
geomorphic processes and aquatic ecosystems.
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Selected Publications |
Brantley, S.L., D.M. Eissenstat, J.A. Marshall, S.E. Godsey, Z. Balogh-Brunstad, D.L. Karwan, S.A. Papuga, J. Roering, T.E. Dawson,
J. Evaristo, O. Chadwick, J.J. McDonnell, and K.C. Weathers, (2017), On the roles trees play in building and plumbing the Critical Zone, Biogeosciences, doi:10.5194/bg-2017-61.
Wymore, A. S., N. R. West, K. Maher, P. L. Sullivan, A. Harpold, D. Karwan, J. A. Marshall, J. Perdrial, D. M. Rempe and L. Ma, (2017), Growing New Generations of International Critical Zone Scientists, Earth Surface Processes and Landforms.
Marshall, J.A., J.J. Roering, D. Granger, and D.G. Gavin, (2017), Late Pleistocene climate controls
on erosion in western Oregon, Geological Society of America Bulletin, doi: 10.1130/B31509.1.
Rempel, A.W., J.A. Marshall, and J.J. Roering, (2016), Modeling relative frost weathering rates at geomorphic
scales, Earth and Planetary Science Letters, doi:10.1016/j.epsl.2016.08.019.
Sklar, L.S., C.S Riebe, J.A. Marshall, J. Genetti, S. Leclere, C.L. Lukens, V. Merces, (2016), The problem of predicting
the particle size distribution of sediment supplied by hillslopes to rivers, Geomorphology, 2016 Binghamton Symposium, “Connectivity in Geomorphology”, doi: 10.1016/j.geomorph.2016.05.005
Marshall, J.A., J.J. Roering, P.J. Bartlein, D.G. Gavin, D.E. Granger, A.W. Rempel, S. Praskievicz,
T.C. Hales, (2015), Seeing frost for the trees: Did climate increase erosion in unglaciated
landscapes during the Late Pleistocene? Science Advances, doi: 10.1126/sciadv.1500715
Harpold, A.A., J.A. Marshall, S.W. Lyon, T.B. Barnhart, B.A. Fisher, M. Donovan, K. M. Brubaker, . . . N. West.
(2015) Laser vision: lidar as a transformative tool to advance critical zone science:
Hydrology and Earth System Sciences, v. 19, p. 2881–2897, doi: 10.5194/hess-19-2881-2015.
Marshall, J.A., and J.J. Roering (2014), Diagenetic variation in the Oregon Coast Range: Implications
for rock strength, soil production, hillslope form, and landscape evolution, Journal of Geophysical Research - Earth Surface, 119, 1395–1417, doi: 10.1002/2013JF003004.
Roering, J.J., B.H. Mackey, J.A. Marshall, K. Sweeney, A.M. Booth, N. Deligne, A.M. Handwerger, and C. Cerovski-Darriau, (2013),
'You are HERE': Connecting the dots with airborne lidar for geomorphic fieldwork,
Geomorphology, 2012 Binghamton Symposium, "The Field Tradition in Geomorphology", doi: 10.10106/j.geomorph.2013.04.009.
Marshall, J.A. and L.S. Sklar (2012), Mining soil databases for landscape-scale patterns in the
abundance and size distribution of hillslope rock fragments, Earth Surface Processes and Landforms, 37(3), 287-300, doi: 10.1002/esp.2241.
Roering, J., J. Marshall, A.M. Booth, M. Mort, and Q. Jin (2010), Evidence for biotic controls on topography
and soil production, Earth and Planetary Science Letters, v. 298, p. 183-190, doi: 10.1016/j.epsl.2010.07.040. (Awarded the G.K. Gilbert Award for Excellence
in Geomorphic Research, American Assoc. of Geographers, 2011)
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