Lee, J.K.W., T.C. Onstott, K.V. Cashman, R.J. Cumbest, and D. Johnson. 1991. “Incremental Heating of Hornblende in Vacuo: Implications for 40 Ar 39 Ar Geochronology and the Interpretation of Thermal Histories”. Geology 19: 872-76. doi:10.1130/0091-7613(1991)019<0872:IHOHIV>2.3.CO;2.

Onstott, T.C., R.B. Hargraves, Derek York, and Chris Hall. 1984. “CONSTRAINTS ON THE MOTIONS OF SOUTH AMERICAN AND AFRICAN SHIELDS DURING THE PROTEROZOIC: I. 40Ar 39Ar AND PALEOMAGNETIC CORRELATIONS BETWEEN VENEZUELA AND LIBERIA.”. Bulletin of the Geological Society of America 95: 1045-54. doi:10.1130/0016-7606(1984)95<1045:COTMOS>2.0.CO;2.

Colwell, F.S., T.C. Onstott, M.E. Delwiche, D. Chandler, J.K. Fredrickson, Q.-J. Yao, J.P. McKinley, et al. 1997. “Microorganisms from Deep, High Temperature Sandstones: Constraints on Microbial Colonization”. FEMS Microbiology Reviews 20: 425-35. doi:10.1016/S0168-6445(97)00024-7.

Tobin, K.J., T.C. Onstott, M.F. DeFlaun, F.S. Colwell, and J. Fredrickson. 1999. “In Situ Imaging of Microorganisms in Geologic Material”. Journal of Microbiological Methods 37: 201-13. doi:10.1016/S0167-7012(99)00044-5.

Dong, H., T.C. Onstott, M.F. DeFlaun, M.E. Fuller, K.M. Gillespie, and J.K. Fredrickson. 1999. “Development of Radiographic and Microscopic Techniques for the Characterization of Bacterial Transport in Intact Sediment Cores from Oyster, Virginia”. Journal of Microbiological Methods 37: 139-54. doi:10.1016/S0167-7012(99)00056-1.

White, D.C., T.J. Phelps, and T.C. Onstott. 1998. “What S up down There?”. Current Opinion in Microbiology 1: 286-90. doi:10.1016/S1369-5274(98)80031-3.

White, D.C., T.J. Phelps, and T.C. Onstott. 1998. “What S up down There?”. Current Opinion in Microbiology 1: 286-90. doi:10.1016/S1369-5274(98)80031-3.

Lollar, B.S., K. Voglesonger, L.-H. Lin, G. Lacrampe-Couloume, J. Telling, T.A. Abrajano, T.C. Onstott, and L.M. Pratt. 2007. “Hydrogeologic Controls on Episodic H2 Rlease from Precambrian Fractured Rocks - Energy for Deep Subsurface Life on Earth and Mars”. Astrobiology 7: 971-86. doi:10.1089/ast.2006.0096.

Lollar, B.S., K. Voglesonger, L.-H. Lin, G. Lacrampe-Couloume, J. Telling, T.A. Abrajano, T.C. Onstott, and L.M. Pratt. 2007. “Hydrogeologic Controls on Episodic H2 Rlease from Precambrian Fractured Rocks - Energy for Deep Subsurface Life on Earth and Mars”. Astrobiology 7: 971-86. doi:10.1089/ast.2006.0096.

Stotler, R.L., S.K. Frape, B.M. Freifeld, B. Holden, T.C. Onstott, T. Ruskeeniemi, and E. Chan. 2011. “Hydrogeology, Chemical and Microbial Activity Measurement Through Deep Permafrost”. Ground Water 49: 348-64. doi:10.1111/j.1745-6584.2010.00724.x.

Stotler, R.L., S.K. Frape, B.M. Freifeld, B. Holden, T.C. Onstott, T. Ruskeeniemi, and E. Chan. 2011. “Hydrogeology, Chemical and Microbial Activity Measurement Through Deep Permafrost”. Ground Water 49: 348-64. doi:10.1111/j.1745-6584.2010.00724.x.

Warr, O., C.J. Ballentine, T.C. Onstott, D.M. Nisson, T.L. Kieft, D.J. Hillegonds, and Sherwood Lollar. 2022. “86Kr Excess and Other Noble Gases Identify a Billion-Year-Old Radiogenically-Enriched Groundwater System”. Nature Communications 13. doi:10.1038/s41467-022-31412-2.