Renne, P.R., T.C. Onstott, M.S. D Agrella-Filho, I.G. Pacca, and W. Teixeira. 1990. “40Ar/39Ar/Dating/of/1.0-1.1/Ga/Magnetizations/from/the/São/Francisco/and/Kalahari/Cratons:/Tectonic/Implications/for/Pan-African/and/Brasiliano/Mobile/Belts”. Earth and Planetary Science Letters 101: 349-66. doi:10.1016/0012-821X(90)90165-T.

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.

Slater, G.F., J. Lippmann-Pipke, D.P. Moser, C.M. Reddy, T.C. Onstott, G. Lacrampe-Couloume, and B.S. Lollar. 2006. “14C in Methane and DIC in the Deep Terrestrial Subsurface: Implications for Microbial Methanogenesis”. Handbook of Environmental Chemistry, Volume 5: Water Pollution 23: 453-62. doi:10.1080/01490450600875787.

Lin, L.-H., J. Hall, T.C. Onstott, T. Gihring, B.S. Lollar, E. Boice, L. Pratt, J. Lippmann-Pipke, and R.E.S. Bellamy. 2006. “Planktonic Microbial Communities Associated With Fracture-Derived Groundwater in a Deep Gold Mine of South Africa”. Handbook of Environmental Chemistry, Volume 5: Water Pollution 23: 475-97. doi:10.1080/01490450600875829.

Onstott, T.C., L.-H. Lin, M. Davidson, B. Mislowack, M. Borcsik, J. Hall, G. Slater, et al. 2006. “The Origin and Age of Biogeochemical Trends in Deep Fracture Water of the Witwatersrand Basin, South Africa”. Handbook of Environmental Chemistry, Volume 5: Water Pollution 23: 369-414. doi:10.1080/01490450600875688.

Wanger, G., G. Southam, and T.C. Onstott. 2006. “Structural and Chemical Characterization of a Natural Fracture Surface from 2.8 Kilometers below Land Surface: Biofilms in the Deep Subsurface”. Handbook of Environmental Chemistry, Volume 5: Water Pollution 23: 443-52. doi:10.1080/01490450600875746.

Pfiffner, S.M., J.M. Cantu, A. Smithgall, A.D. Peacock, D.C. White, D.P. Moser, T.C. Onstott, and E. van Heerden. 2006. “Deep Subsurface Microbial Biomass and Community Structure in Witwatersrand Basin Mines”. Geomicrobiology Journal 23: 431-42. doi:10.1080/01490450600875712.

Ward, J.A., G.F. Slater, D.P. Moser, L.-H. Lin, G. Lacrampe-Couloume, A.S. Bonin, M. Davidson, et al. 2004. “Microbial Hydrocarbon Gases in the Witwatersrand Basin, South Africa: Implications for the Deep Biosphere”. Geochimica Et Cosmochimica Acta 68: 3239-50. doi:10.1016/j.gca.2004.02.020.

Lollar, B.S., G. Lacrampe-Couloume, K. Voglesonger, T.C. Onstott, L.M. Pratt, and G.F. Slater. 2008. “Isotopic Signatures of CH4 and Higher Hydrocarbon Gases from Precambrian Shield Sites: A Model for Abiogenic Polymerization of Hydrocarbons”. Geochimica Et Cosmochimica Acta 72: 4778-95. doi:10.1016/j.gca.2008.07.004.

Wanger, G., T.C. Onstott, and G. Southam. 2008. “Stars of the Terrestrial Deep Subsurface: A Novel Star-Shaped Bacterial Morphotype from a South African Platinum Mine”. Geobiology 6: 325-30. doi:10.1111/j.1472-4669.2008.00163.x.

MacLean, L.C.W., T.J. Pray, T.C. Onstott, E.L. Brodie, T.C. Hazen, and G. Southam. 2007. “Mineralogical, Chemical and Biological Characterization of an Anaerobic Biofilm Collected from a Borehole in a Deep Gold Mine in South Africa”. Geomicrobiology Journal 24: 491-504. doi:10.1080/01490450701572416.