Data from scanning electron microscopy together with analyses of organic carbon, nitrogen, and sulfur in stained and unstained samples of Indiana limestone provide new insights into the composition of pad marks and the processes that contribute to their development.

Ennis, M. V., Comer, J. B., Pratt, L. M., Elbaz, C. C., Fong, J., Branam, T. D., Smith, R. T., and Hill, J. R., 2009, Processes contributing to the development of pad marks on Indiana limestone: Indiana Geological Survey Report of Progress 37, 19 p., 9 figs.,

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Keywords: limestone, pad marks, Salem, microbial, SEM, sulfur, carbbon, nitrogen

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