Recent Publications

Halverson, G.P., Hoffman, P.F., Schrag, D.P. and Kaufman, J.A. (2002) A major perturbation of the carbon cycle before the Ghaub glaciation (Neoproterozoic) in Namibia: Prelude to snowball Earth? Geophys, Geochem. Geosyst. 3, on-line 10.1029/2001GC000244.
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Schrag, D.P., Berner, R.A., Hoffman, P.F., and Halverson, G.P. (2002) On the initiation of a snowball Earth. Geophys. Geochem. Geosyst. 3, on-line 10.1029/2001GC000219.
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Hoffman, P.F. and Schrag, D.P. (2002) The snowball Earth hypothesis: testing the limits of global change. Terra Nova 14, 129-155.
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Hoffman, P.F. (2002) Carbonates bounding glacial deposits: evidence for snowball Earth episodes and greenhouse aftermaths in the Neoproterozoic Otavi Group of northern Namibia. International Assoc. Sedimentologists Field Excursion Guidebook, 1-49, Auckland Park, South Africa.
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Maloof, A.C., Kellogg, J.B., and Anders, A.M. (in press) Neoproterozoic sand wedges: crack formation in frozen soils under diurnal forcing during a snowball Earth. Earth Planet. Sci. Lett.
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Higgins, J.A. and Schrag, D.P. (submitted) The aftermath of a snowball Earth. Geophys. Geochem. Geosyst.