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Fiske, P.S., R.B. Hargraves, T.C. Onstott, C. Koeberl, and S.B. Hougen. 1992. “Pseudotachylites of the Beaverhead Impact Structure: Geochemicaly Geochronological, Petrographic, and Field Investigations”. Special Paper of the Geological Society of America 293: 163-76. doi:10.1130/SPE293-p163.

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.

Reid, D.L., I.G.D. Ransome, T.C. Onstott, and C.J. Adams. 1991. “Time of Emplacement and Metamorphism of Late Precambrian Mafic Dykes Associated With the Pan-African Gariep Orogeny, Southern Africa: Implications for the Age of the Nama Group”. Journal of African Earth Sciences 13: 531-41. doi:10.1016/0899-5362(91)90116-G.

Lin, L.-H., T.C. Onstott, and H. Dong. 2000. “Backscattered 39Ar Loss in Fine-Grained Minerals: Implications for 40Ar 39Ar Geochronology of Clay”. Geochimica Et Cosmochimica Acta 64: 3965-74. doi:10.1016/S0016-7037(00)00439-7.

Cumbest, R.J., E.L. Johnson, and T.C. Onstott. 1994. “Argon Composition of Metamorphic Fluids: Implications for 40 Ar 39 Ar Geochronology”. Geological Society of America Bulletin 106: 942-51. doi:10.1130/0016-7606(1994)106<0942:ACOMFI>2.3.CO;2.

Agrella-Filho, M.S. D, I.I.G. Pacca, R.I.F. Trindade, W. Teixeira, M.I.B. Raposo, and T.C. Onstott. 2004. “Paleomagnetism and 40Ar 39Ar Ages of Mafic Dikes from Salvador (Brazil): New Constraints on the São Francisco Craton APW Path Between 1080 and 1010 Ma”. Precambrian Research 132: 55-77. doi:10.1016/j.precamres.2004.02.003.