Iowa State University

Iowa State University

College of Liberal Arts and Sciences

Department of Geological and Atmospheric Sciences

Got a question or comment?
Contact us at 515-294-4477 (geology)
geology@iastate.edu

Meteorology Undergrad Program
Phone: 515-294-3846
Meteorology Graduate Program
Phone: 515-294-1361


Neal Iverson
Chair
Department of Geological & Atmospheric Sciences
253 Science I
Ames, Iowa 50011

FAX: 515-294-6049

Xiaoqing Wu
Professor-in-Charge
Meteorology Program
3011 Agronomy Hall
515-294-9872


Publications by Neal Iverson


Iverson, N.R., submitted. A theory of glacial quarrying for landscape evolution models. Nature Geoscience.


Iverson, N.R., and Peterson, B.B., in press. A new laboratory device for study of subglacial processes: first results on ice-bed separation during sliding. Journal of Glaciology.


Iverson, N.R., and Person, M., in press. Glacier-bed geomorphic processes and hydrological conditions relevant to nuclear waste disposal. Geofluids.


Gentoso, M.J., Evenson, E.B., Kodama, K.P., Iverson, N.R., Alley, R.B., Berti, C., Kozlowski, A., in press. Exploring till bed kinematics using magnetic and pebble fabrics: North-central New York. Boreas.


Moore, P.L., Iverson, N.R., Brugger, K.A., Cohen, D., Hooyer, T.S., Jansson, P., 2011. Effect of a cold margin on ice flow at the terminus of Storglaciären, Sweden: implications for sediment transport, Sweden. Journal of Glaciology, 57(201), 77-87.


Iverson, N.R., 2010. Shear resistance and continuity of till at glacier beds: hydrology rules. Journal of Glaciology, 56(200), 1104-1114.


Iverson, N.R., J.E. Mann, R.M. Iverson, 2010. Effects of soil aggregates on debris-flow mobilization: results from ring-shear experiments.Engineering Geology,114, 84-92.


Reid, M, T. Keith, R. Kayan, N.R. Iverson, R.M. Iverson, D. Brien, 2010. Volcano collapse promoted by progressive strength reduction: new data from Mount St. Helens. Bulletin of Volcanology, 72, 761-766


Moore , P.L., N.R. Iverson, and D. Cohen, 2010. Conditions for thrust faulting in glaciers. Journal of Geophysical Research-Earth Surface,115, F02005, doi:10.1029/2009JF001307.


Moore , P.L., N.R. Iverson, and D. Cohen, 2009. Ice flow across a warm-based/cold-based transition at a glacier margin. Annals of Glaciology, 50(52), 1-8.


Shumway, J.R., and N.R. Iverson, 2009. Magnetic fabrics of the Douglas Till of the Superior lobe: exploring bed-deformation kinematics. Quaternary Science Reviews, 28, 107-119.


Thomason, J.F., and N.R. Iverson, 2009. Deformation of the Batestown Till of the Lake Michigan Lobe. Journal of Glaciology, 55(189), 131-146.


Thomas, J.T., N.R. Iverson, and M.R. Burkart, 2009. Bank-collapse processes in a gully. Earth Surface Processes and Landforms, 34, 109-122.


Moore , P.L., N.R. Iverson, and R.M. Iverson, 2008. Frictional properties of the Mount St.Helens gouge. in Sherrod, D.R., W.E. Scott, and P.H. Stauffer, eds., A Volcano Rekindled: the first year of the renewed eruption of Mount St. Helens, 2004-2006. U.S.Geological Survey Professional Paper, 425-424.


Iverson, N.R., T.S. Hooyer, J.F. Thomason, M. Graesch, and J.R. Shumway, 2008. The experimental basis for interpreting particle and magnetic fabrics of sheared till, for a special issue of Earth Surface Processes and Landforms: Reconstructing Ice-Sheet Dynamics from Subglacial Sediments and Landforms, edited by C.R. Stokes and C. O’Cofaigh, 33, 627-645.


Hooyer, T.S., N.R. Iverson, F. Lagroix, and J. F. Thomason, 2008. Magnetic fabric of sheared till: A strain indicator for evaluating the bed deformation model of glacier flow. Journal of Geophysical Research-Earth Surface, 113, F02002, doi:10.1029/2007JF000757.


Thomason, J.F. and N.R. Iverson, 2008. A laboratory study of particle ploughing and pore-pressure feedback: A velocity-weakening mechanism for soft glacier beds. Journal of Glaciology, 54, 169-181.


Iverson, N.R., T. S. Hooyer, U. H. Fischer, D. Cohen, P. L. Moore, M. Jackson, G. Lappegard, and J. Kohler, 2007. Soft-bed experiments beneath Engabreen, Norway: Regelation infiltration, basal slip, and bed deformation, Journal of Glaciology, 53, 323-341.


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.

Amundson, J.M., and N.R. Iverson, 2006. Testing a glacial erosion rule using hang heights of hanging valleys, Jasper National Park, Alberta, Canada. Journal of Geophysical Research-Earth Surface, 111, doi: 10.1029/2005JF000359 (8 pages).

Thomason, J.F. and N.R. Iverson, 2006. Microfabric and microshear evolution in deformed till. Quaternary Science Reviews, 25, 1027-1038.

Cohen, D., N.R. Iverson, T.S. Hooyer, U.H Fischer, M. Jackson, and P.L. Moore, 2005. Debris-bed friction of hard-bedded glaciers. Journal of Geophysical Research-Earth Surface. doi: 10.1029/2004JF000228 (15 pages).

Scherer, R.P., C.M Sjunneskog, N.R. Iverson, and T.S. Hooyer, 2005. Frustules to fragments, diatoms to dust: how degradation of microfossil shape and microstructures can teach us how ice sheets work. Journal of Nanoscience and Nanotechnology, 5, 96-99.

Iverson, N.R., and T.S. Hooyer, 2004. Estimating the sliding velocity of a Pleistocene ice sheet from plowing structures in the geologic record. Journal of Geophysical Research-Earth Surface, 109, doi:1029/2004JF000132 (11 pages)

Scherer, R.P., C.M Sjunneskog, N.R. Iverson, and T.S. Hooyer, 2004. Assessing subglacial processes from diatom fragmentation patterns. Geology, 32, 557-560.

Thomas, J.T., N.R. Iverson, M.R. Burkart, and L.A. Kramer, in press. Long-term growth of a valley-bottom gully. Earth Surface Processes and Landforms.

Iverson, N.R., D. Cohen, T.S. Hooyer, U.H. Fischer, M. Jackson, P.L. Moore, G. Lappegard, and J. Kohler, 2003. Effects of basal debris on glacier flow. Science 301, 81-83.

Hooyer, T.S., and N.R. Iverson, 2002. Flow mechanism of the Des Moines lobe of the Laurentide ice sheet, J. Glaciol., 48, 575-586.

Moore, P.L., and N.R. Iverson, 2002. Slow episodic shear of granular materials regulated by dilatant strengthening. Geology, 30, 843-846.

Iverson, N.R., 2002. Processes of glacial erosion, in Menzies, J., ed., Modern and Past Glacial Environments: Revised Student Edition, Butterworth/Heinemann, Oxford, 131-146 (Invited).

Iverson, N.R. and T.S. Hooyer, 2002. Clast-fabric development in a shearing granular material: implications for subglacial till and fault gouge: Reply to discussion of D. I. Benn. Geological Society of America Bulletin, 114, 383-384.

Iverson, N.R., and R.M. Iverson, 2001. Distributed shear of subglacial till due to Coulomb slip. Journal of Glaciology, 47, 481-488.

Hooyer, T.S. and N.R. Iverson, 2000. Diffusive mixing between shearing granular materials: constraints on bed deformation from till contacts. Journal of Glaciology, 46, 641-651.

Cohen, D., R. LeB. Hooke, N.R. Iverson, and J. Kohler, 2000. Sliding of ice past an obstacle at Engabreen, Norway. Journal of Glaciology, 46, 599-610.

Iverson, R.M., M.E. Reid, N.R. Iverson, R.G. LaHusen, M. Logan, J.E. Mann, and D.L. Brien, 2000. Acute sensitivity of landslide rates to initial soil porosity. Science, 290, 513-516.

Iverson, N.R., 2000. Sediment entrainment by a soft-bedded glacier: a model based on regelation into the bed. Earth Surface Processes and Landforms, 25, 881-893.

Hooyer, T.S., and N.R. Iverson, 2000. Clast-fabric development in a shearing granular material: implications for subglacial till and fault gouge. Geological Society of America Bulletin, 112, 683-692.

Iverson, N.R., R.W. Baker, R. LeB. Hooke, B. Hanson, and P. Jansson, 1999. Coupling between a glacier and a soft bed: I. A relation between water pressure and local shear stress determined from till elasticity. Journal of Glaciology, 44, 41-53.

Iverson, N.R., 1999. Coupling between a glacier and a soft bed: II. Model results. Journal of Glaciology, 44, 31-40.

Iverson, N.R., R.W. Baker, and T.S. Hooyer, 1998. Ring-shear studies of till deformation: Coulomb-plastic behavior and distributed strain in glacier beds. Journal of Glaciology, 44, 634-642.

Fischer, U.H., N.R. Iverson, B. Hanson, P. Jansson, and R. LeB. Hooke, 1998. Estimation of hydraulic properties of a subglacial till layer from ploughmeter measurements. Journal of Glaciology, 44, 517-522.

Iverson, N.R. , R.W. Baker, and T. Hooyer, 1997. A ring-shear device for the study of sediment deformation: Tests on tills with contrasting clay contents. Quaternary Science Reviews, 16, 1057-1066.

Hooke, R. Leb., B. Hanson, N. R. Iverson, P. Jansson, and U. Fischer, 1997. Rheology of subglacial till, Storglacia..ren, Sweden. Journal of Glaciology, 43, 172-179.

Iverson, N.R., and R. Souchez, 1996. Isotopic signature of debris-rich ice formed by regelation into a subglacial sediment bed. Geophysical Research Letters, 23, 1151-1153

Iverson, N.R., T. Hooyer, and R. LeB. Hooke, 1996. A laboratory study of sediment deformation: Stress heterogeneity and grain-size evolution. Annals of Glaciology, 22, 167-175.

Iverson, N.R., B. Hanson, R. LeB. Hooke, and P. Jansson, 1995. Flow mechanism of glaciers on soft beds. Science, 267, 80-81.

Iverson, N.R., 1995. Processes of erosion. In Glacial environments - processes, sediments, and landforms, v. 1, ed. J. Menzies, Butterworth Heinemann, Oxford, 241-259. (Invited)

Iverson, N.R. and Semmens, D., 1995. Intrusion of ice into porous media by regelation: A mechanism of sediment entrainment by glaciers. Journal of Geophysical Research, 100, 10219-10230.

Hooke, R. LeB. and N.R. Iverson, 1995. Grain-size distribution in deforming subglacial tills: Role of grain fracture. Geology, 23, 57-60.

Iverson, N.R., P. Jansson, and R. LeB. Hooke, 1994. In situ measurement of the strength of deforming subglacial sediment. Journal of Glaciology, 40, 497-503.

Iverson, N.R., 1993. Regelation of ice through debris at glacier beds: implications for sediment transport. Geology, 21, 559-562.

Iverson, N.R., 1991. Potential effects of of subglacial water-pressure fluctuations on quarrying. Journal of Glaciology, 37, 27-36.

Iverson, N.R., 1991. Morphology of glacial striae: implications for abrasion of glacier beds and fault surfaces. Geological Society of America Bulletin, 103, 1308-1316.

Iverson, N.R., 1990. Laboratory simulations of glacial abrasion: comparison with theory. Journal of Glaciology, 36, 304-314.

Hooke, R., LeB., P. Holmlund, and N.R. Iverson, 1987. Extrusion flow demonstrated by borehole deformation measurements over a riegel, Storglaciären, Sweden. Journal of Glaciology, 33, 72-78.

Hooke, R., LeB., and N.R. Iverson, 1985. Experimental study of ice flow around a bump: comparison with theory. Geografiska Annaler, 67A, 187-198.