Paleointensity, Cretaceous paleomagnetism, plate motion and tectonics, hotspot motion, rock magnetism and environmental magnetism, experimental design for magnetic measurements.
Courses Offered (subject to change)
Introduction to Physical Geology
Evolution of the Earth
Solid Earth Geophysics
Paleomagnetism and Global Plate Tectonics
Seminar in Paleomagnetism
J.A. Tarduno, R.D. Cottrell and S.L. Wilkison, Magnetostratigraphy of
the Late Cretaceous to Eocene Sverdrup Basin: Implications for
heterochroneity, deformation and rotations in the Canadian Arctic
Archipelago, Journal of Geophysical Research,102, 723-746, 1997.
J. A. Tarduno and R. D. Cottrell, Paleomagnetic evidence for motion
of the Hawaiian hotspot during formation of the Emperor seamounts, Earth and Planetary Science Letters,153, 171-180, 1997.
J. A. Tarduno, D. B. Brinkman, P. R. Renne, R. D. Cottrell, H. Scher,
P. Castillo, Evidence for Extreme Climatic Warmth from Late Cretaceous
Arctic Vertebrates, Science,282, 2241-2244, 1998.
R. D. Cottrell and J. A. Tarduno, Geomagnetic paleointensity derived from single plagioclase crystals, Earth and Planetary Science Letters,169, 1-5, 1999.
R. D. Cottrell and J. A. Tarduno, Late Cretaceous True Polar Wander: Not So Fast, Science,288, 2283, 2000.
R. D. Cottrell and J. A. Tarduno, In search of high fidelity
geomagnetic paleointensities: A comparison of single plagioclase crystal
and whole rock Thellier-Thellier analyses, Journal of Geophysical Research,105, 23,579-23,594, 2000.
J. A. Tarduno, R. D. Cottrell, and Alexei V. Smirnov, High
Geomagnetic Field Intensity During the mid-Cretaceous from Thellier
Analyses of Single Plagioclase Crystals, Science, 291, 1779-1783, 2001.
J. A. Tarduno, R. D. Cottrell, and A. V. Smirnov, The Cretaceous superchron geodynamo: Observations near the tangent cylinder, Proceedings of the National Academy of Sciences of the United States of America, 99, 14020-14025, 2002.
R. D. Cottrell and J. A. Tarduno, A Late Cretaceous pole for the
Pacific plate: implications for apparent and true polar wander and the
drift of hotspots, Tectonophysics,362, 321-333, 2003.
J. A. Tarduno, R. A. Duncan, D. W. Scholl, R. D. Cottrell, B.
Steinberger, T. Thordarson, B. C. Kerr, C. R. Neal, F. A. Frey, M.
Torii, and C. Carvallo, The Emperor Seamounts: Southward Motion of the
Hawaiian Hotspot Plume in Earth's Mantle, Science,301, 1064-1069, 2003.
J. A. Tarduno and R. D. Cottrell, Dipole strength and variation of
the time-averaged reversing and nonreversing geodynamo based on Thellier
analyses of single plagioclase crystals, Journal of Geophysical Research,110, B11101, doi:10.1029/2005JB003970, 2005.
J. A. Tarduno, R. D. Cottrell, and Alexei V. Smirnov, The
paleomagnetism of single silicate crystals: Recording geomagnetic field
strength during mixed polarity intervals, superchrons, and inner core
growth, Reviews in Geophysics,44(1), RG1002, 10.1029/2005RG000189, 2006.
J. A. Tarduno, R. D. Cottrell, M. K. Watkeys, and D. Bauch,
Geomagnetic field strength 3.2 billion years ago recorded by single
silicate crystals, Nature,446, 657-660, doi:10.1038/nature05667, 2007.
R. D. Cottrell, J. A. Tarduno, and J. Roberts, The Kiaman Reversed
Polarity Superchron at Kiama: Toward a field strength estimate based on
single silicate crystals, Physics of the Earth and Planetary Interiors, 169, 49-58, doi:10.1016/j.pepi.2008.07.041, 2008.
Y. Usui, J.A. Tarduno, M. Watkeys, A. Hofmann and R.D. Cottrell, Evidence for a 3.45 billion-year-old magnetic
remanence from conglomerates of South Africa, Geochem. Geophys. Geosystems (G-cubed), 10, Q09Z07, 2009.
J.A. Tarduno, R.D. Cottrell, M.K. Watkeys, A. Hofmann, P.V.
Doubrovine, E.E. Mamajek, D. Liu, D.G. Sibeck, L.P. Neukirch and Y.
Usui, Geodynamo, Solar wind, and magnetopause 3.4 to 3.45 billion years
ago, Science, 327, 1238-1240, 2010.