Crustal Geophysics and Geochemistry Science Center

Critical Zone Processes Across Landscapes

Critical Zone Studies in Pennsylvania

Task Objectives

Task objectives are to evaluate the role of shale weathering on soil and stream sediment geochemistry in Pennsylvania both regionally and within the National Science Foundation Critical Zone observatory site.

Statement of Work

The task strategy is to collect and analyze samples and coordinate with researchers at Penn State University.



  • Tuttle, M.L.W., Breit, G.N., Fahy, J., Goldhaber, M.B., and Grauch, R.I., 2008, Trace-metal accumulation in regolith derived from black shale in humid and semi-arid weathering regimes: USA: 2008 Joint Annual Meeting of the Geological Society of America, American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, and Gulf Coast Association of Geological Societies, 5-9 October, Houston, Texas, CD-ROM. View Tuttle 2008 GSA abstract.

Reports and Articles

  • Tuttle, M.L.W., and Breit, G.N., 2009, Weathering of the New Albany Shale, Kentucky, USA: I. Weathering zones defined by mineralogy and major-element composition: Applied Geochemistry, 24 (8), pp. 1549-1564. doi:10.1016/j.apgeochem.2009.04.021
  • Tuttle, M.L.W., Breit, G.N., and Cozzarelli, I.M., 2009, Processes affecting δ34S and δ18O values of dissolved sulfate in alluvium along the Canadian River, central Oklahoma, USA: Chemical Geology, 265 (3-4), pp. 455-467. doi:10.1016/j.chemgeo.2009.05.009
  • Tuttle, M.L.W., Breit, G.N. and Goldhaber, M.B., 2009, Weathering of the New Albany Shale, Kentucky: II. Redistribution of minor and trace elements: Applied Geochemistry, 24 (8), pp. 1565-1578. doi:10.1016/j.apgeochem.2009.04.034

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