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Jackson School of Geosciences
Geology Department
Department of Geological SciencesBureau of Economic GeologyInstitute for Geophysics

Timothy M Shanahan

Publications
Assistant Professor
Jackson School of Geosciences


Reprints and files posted here are in Adobe Acrobat (PDF) format and are intended for private, scientific use only and may not be redistributed.



1. Shanahan, T.M., Overpeck, J.T., Anchukaitis, K.J., Beck, J.W., Cole, J.E., Dettman, D.L., Peck, J.A., Scholz, C.A., and King, J.W., 2009, Atlantic Forcing of Persistent Drought in West Africa: Science, v. 324, p. 377-380.(download pdf)

2. Schouten, S., Hopmans, E.C., van der Meer, J., Mets, A., Bard, E., Bianchi, T.S., Diefendorf, A., Escala, M., Freeman, K.H., Furukawa, Y., Huguet, C., Ingalls, A., Menot-Combes, G., Nederbragt, A.J., Oba, M., Pearson, A., Pearson, E.J., Rosell-Mele, A., Schaeffer, P., Shah, S.R., Shanahan, T.M., Smith, R.W., Smittenberg, R., Talbot, H.M., Uchida, M., Van Mooy, B.A.S., Yamamoto, M., Zhang, Z.H., and Damste, J.S.S., 2009, An interlaboratory study of TEX86 and BIT analysis using high-performance liquid chromatography-mass spectrometry: Geochemistry Geophysics Geosystems, v. 10. (download pdf)

3. Pigati, J.S., Bright, J.E., Shanahan, T.M., and Mahan, S.A., 2009, Late Pleistocene paleohydrology near the boundary of the Sonoran and Chihuahuan Deserts, southeastern Arizona, USA: Quaternary Science Reviews, v. 28, p. 286-300. (download pdf)

4. Shanahan, T.M., Overpeck, J.T., Sholz, C.A., Beck, J.W., Peck, J., and King, J.W., 2008, Abrupt changes in the water balance of tropical West Africa during the late Quaternary Journal of Geophysical Research-Atmospheres, v. 113, p. D12107. (download pdf)

5. Shanahan, T.M., Overpeck, J.T., Hubeny, J.B., King, J., Hu, F.S., Hughen, K., Miller, G., and Black, J., 2008, Scanning micro-X-ray fluorescence elemental mapping: A new tool for the study of laminated sediment records: Geochemistry Geophysics Geosystems, v. 9. (download pdf)

6. Conroy, J.L., Overpeck, J.T., Cole, J.E., Shanahan, T.M., and Steinitz-Kannan, M., 2008, Holocene changes in eastern tropical Pacific climate inferred from a Galapagos lake sediment record: Quaternary Science Reviews, v. 27, p. 1166-1180. (download pdf)

7. Shanahan, T. M., Overpeck, J. T., J.W.Beck, Wheeler, C. W., Peck, J. A., King, J. W., and Scholz, C. A., 2008. The formation of biogeochemical laminations in Lake Bosumtwi, Ghana, and their usefulness as indicators of past environmental changes. Journal of Paleolimnology  (download pdf)

8. Shanahan T. M., Overpeck J. T., Sholz C., Sharpe E., and Arko J., 2007 Simulating the response of a closed basin lake to recent climate and land-use changes in tropical West Africa (Lake Bosumtwi, Ghana). Hydrological Processes 21 (13) 1678-1691. (download pdf)

9. Scholz, C.A., T.C. Johnson, A.S. Cohen, J.W. King, J.P., J.T. Overpeck, M.R. Talbot, E.T. Brown, L .Kalindekafe, P.Y.O. Amoako, R.P. Lyons, T.M. Shanahan, I.S. Castaneda, C.W. Heil, S.L. Forman, L.R. McHargue, K.R. Beuning, J.Gomez, and J. Pierson, East African megadroughts between 135-75 kyr ago and implications for early human history. Proceedings of the National Academy of Sciences, 10.1073/pnas.0703874104. (download pdf)

10. Shanahan T. M., Overpeck J. T., Beck J. W., Pigati J., Wheeler C. W., Talbot M. R., Scholz C. A., Peck J., and King J. W., (2006), Paleoclimatic variations in West Africa from a record of late Pleistocene and Holocene lake level stands of Lake Bosumtwi, Ghana. Palaeoceanography, Palaeoclimatology, Palaeoecology 242 (3-4), 287-302. (download pdf)

11. Shanahan, T. M., Pigati, J. S., Dettman, D. L., and Quade, J. (2005), Isotopic variability in the aragonite shells of freshwater gastropods living in springs with nearly constant temperature and isotopic composition. Geochimica Et Cosmochimica Acta 69(16), 3949-3966. (download pdf)

12. Pigati, J.S., Quade, J., Shanahan, T.M., and Haynes, C.V., 2004, Radiocarbon dating of minute gastropods and new constraints on the timing of late Quaternary spring-discharge deposits in southern Arizona, USA: Palaeogeography Palaeoclimatology Palaeoecology, v. 204, p. 33-45. (download pdf)

13. Peck J. A., Green R. R., Shanahan T., King J. W., Overpeck J. T., and Scholz C. A. 004 A magnetic mineral record of Late Quaternary tropical climate variability from Lake Bosumtwi, Ghana. Palaeogeography Palaeoclimatology Palaeoecology 215(1-2), 37-57. (download pdf)

14. Shanahan, T. M., and M. Zreda, 2000 Chronology of Quaternary glaciations in East Africa: Earth and Planetary Science Letters, v. 177, p. 23-42. (download pdf)

15. Giletti, B.J., and Shanahan, T.M. 1997 Alkali diffusion in plagioclase feldspar: Chemical Geology, v. 139; 1-4, p. 3-20. (download pdf)