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Ted Present, Ph. D. Senior Scientific Researcher
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Publications

C.V. | Google Scholar | ResearchGate
ORCiD: 0000-0002-4747-2174

* = undergraduate mentee; ** = graduate mentee; † = co-first author; ‡ = senior author

  1. Swindle, C. **, Vasconcelos, P., Cardarelli, E., Dalleska, N., Bhattacharjee, S., Dimarco, Z., Farley, K., Present, T. M. ‡, [in review], Trace Element Compositions and Redox Shifts Preserved in Magnesites, Sediments and Soils from the Kunwarara Magnesite Mine. Applied Geochemistry.
  2. Lotem, N., Rasmussen, B., Zi, J.-W., Zeichner, S. S., Present, T. M., Fischer, W. W., [in press], Reconciling Archean organic-rich mudrocks with low primary productivity before the Great Oxygenation Event. Proceedings of the National Academy of Sciences.
  3. Zimmt, J. B., Bergmann, K. D., Finnegan, S., Present, T. M., Jost, A., Desrochers, A., [in revision], Isotopic constraints on the timing and intensity on the peak of the Early Paleozoic Icehouse. Geological Society of America Bulletin.
  4. Hatton, K., Henkes, G., Sousa, F., Cox, S., Hemming, S., Saslaw, M., Steponaitis, E., Ma, C., Present, T. M., Jaret, S. J., Ehm, L., Northrup, P., Tappero, R. V., Wooton, K. M., Rossie, J., Cote, S., Nengo, I., Feibel, C., Rasbury, E. T., [in revision], A middle Miocene disconformity in the Lothidok Hills of the Turkana Basin, Kenya documented by U-Pb geochronology of dolomitized fossil wood.
  5. Present, T. M., Bergmann, K. D., Ryb, U., Eiler, J. M., Grotzinger, J. P., [in revision], Primary seawater chemistry in fabric-retentive early dolomite.
  6. Quinn, D. P., Grotzinger, J. P, Present, T. M., [in revision], Tectonostratigraphy of the Zebra Series and the tectonic evolution of the Naukluft Mountains, Namibia. Geological Society of America Bulletin.
  7. Johnson, J. E., Present, T. M. †, Valentine, J. S., 2024, Iron: life's primeval transition metal. Proceedings of the National Academy of Sciences, v. 121, no. 38, p. 1-10, doi: 10.1073/pnas.2318692121 (PDF, Press [a], [b], [c])
  8. Cantine, M., Orzechowski, E., Stein, N., Lincoln, T., Hibner, B., Present, T. M., Thorpe, M., Strauss, J., Rumbelsperger, A. M. B., Alleon, J., Knoll, A., Grotzinger, J., Gomes, M., Trower, E., 2024, Rapid growth of a carbonate island over the last millennium. Sedimentology, v. 71, no. 7, p. 2067-2512, doi: 10.1111/sed.13202 (PDF)
  9. Moore, K. R., Crémière, A., Present, T. M., Barnett, A., Bergmann, K. D., Amthor, J., Grotzinger, J., 2024, Primary microfossiliferous chert in the Aptian Barra Velha Formation. Sedimentology, v. 71, no. 6, p. 1815-1842, doi: 10.1111/sed.13193 (PDF)
  10. Present, T. M., Niespolo, E. M. Clarke, C. E., Behrensmeyer, A. K., Leakey, L. N., Leakey, M. G., Mongle, C., Du Pleiss, A., Northrup, P., Tappero, R. V., Yang, D., Rasbury, E. T., Grine, F. E., 2024, Nondestructive geochemical characterization of hominin fossil taphonomy and burial history. Quaternary Science Reviews, v. 328, 108525, doi: 10.1016/j.quascirev.2024.108525 (PDF)
  11. Sanders, C., B., Present, T. M., Marroquin, S., Grotzinger, J., 2024, Sulfur geochemistry of the Salitre Formation phosphorites: Implications for the role of microbial ecology, sulfur cycling in phosphogenesis on an Ediacaran carbonate platform. Geochimica Cosmochimica Acta, v. 367, p. 41-57, doi: 10.1016/j.gca.2023.12.033 (PDF)
  12. Present, T. M., Bergmann, K. D., Ryb, U., Bryant, R. N., Grotzinger, J. P, 2023, Early Diagenesis in the Permian Reef. In Advances in the Understanding and Interpretation of Carbonates, SEPM Short Course Notes No. 57, Playton, T. E. and Harris, P. M. (eds.), Claremore, Oklahoma: SEPM (Society for Sedimentary Geology), p. 157-160, doi: 10.2110/sepmscn.057.40
  13. Stein, N. T., Grotzinger, J. P., Quinn, D. P., Lingappa, U. F., Present, T. M., Trower, E. J., Gomes, M. L., Orzechowski, E., Cantine, M., Metcalfe, K. S., Fischer, W. W., Ehlmann, B. L., Strauss J. V., Knoll, A. H., 2023, Geomorphic and environmental controls on microbial mat fabric on Little Ambergris Cay, Turks and Caicos Islands. Sedimentology, v. 70, no. 6, p. 1915-1944, doi: 10.1111/sed.13100 (PDF)
  14. Lincoln, T. A, Webb, S. M., Present, T. M, Magyar, J. S., Trower, E. J., 2022, Microbial activity and neomorphism influence the composition and microfabric of ooids from Great Salt Lake, UT. The Sedimentary Record, v. 20, no. 1, doi: 10.2110/001c.56183 (PDF)
  15. Moore, K. R., Present, T. M., Pavia, F., Grotzinger, J. P., Hollis, J. R., Sharma, S., Flannery, D., Bosak, T., Tuite, M., Knoll, A. H., Williford, K., 2022, Biosignature preservation aided by organic-cation interactions in Proterozoic tidal environments. PALAOIS, v. 37, p. 486-498, doi: 10.2110/palo.2022.017 (PDF)
  16. Lingappa, U. F., Stein, N. T., Metcalfe, K. S., Present, T. M., Orphan, V. J., Knoll, A. H., Grotzinger, E. J., Gomes, M. L., Fischer, W. W., 2022, Early impacts of climate change on a coastal marine microbial mat ecosystem. Science Advances, v. 8, no. 21, eabm7826, doi: 10.1126/sciadv.abm7826 (PDF)
  17. Bryant, R. N., Present, T. M., Ahm, A.-S. C., McClelland, H.-L. O., Razionale, D., Blättler, C. L., 2022, Early diagenetic constraints on Permian seawater chemistry from the Capitan Reef. Geochimica et Cosmochimica Acta, v. 328, p. 1-18, doi: 10.1016/j.gca.2022.04.027 (PDF)
  18. Ingalls, M., Grotzinger, J. P., Present, T. M., Rasmussen, B., Fischer, W. W., 2021, Carbonate-associated phosphate (CAP) indicates elevated phosphate availability in Neoarchean shallow marine environments. Geophysical Research Letters, v. 49, no. 6, e2022GL098100, doi: 10.1029/2022GL098100 (PDF)
  19. Johnson, D. L., Present, T. M., Li, M., Shen, Y., Adkins, J. F., 2021, Carbonate associated sulfate δ34S heterogeneity across the End-Permian Mass Extinction. Earth & Planetary Science Letters, v. 574, no. 117172, p. 1-10, doi: 10.1016/j.epsl.2021.117172 (PDF)
  20. Present, T. M., Gomes, M. L., Trower, E. J., Stein, N. T., Lingappa, U. F., Naviaux, J., Thorpe, M. T., Cantine, M. D., Fischer, W. W., Knoll, A. H., Grotzinger, J. P., 2021, Non-lithifying microbial ecosystem dissolves peritidal lime sand. Nature Communications, v. 12, no. 3037, p. 1-8, doi: 10.1038/s41467-021-23006-1 (PDF)
  21. Rasbury, E. T., Present, T. M., Northrup, P., Tappero, R., Lanzirotti, A. Cole, J. M., Wooton, K., Hatton, K., 2021, Tools for uranium characterization in carbonate samples: Case studies of natural U-Pb geochronology reference materials. Geochronology [Special Issue: In situ carbonate U–Pb geochronology], v. 3, no. 1, p. 103-122, doi: 10.5194/gchron-3-103-2021 (PDF)
  22. Goldberg, S. L., Present, T. M., Finnegan, S., Bergmann, K., 2021, A high-resolution record of early Paleozoic climate. Proceedings of the National Academy of Sciences, v. 118, no. 6, e2013083118, doi: 10.1073/pnas.2013083118 (PDF)
  23. Smith, B. P., Ingalls, M., Trower, E. J., Lingappa, U. F., Present, T. M., Magyar, J. S., Fischer, W. W., 2020, Physical Controls on Carbonate Intraclasts: Modern Flat Pebbles from Great Salt Lake, Utah. Journal of Geophysical Research – Earth Surface, v. 125, no. 11, e2020JF005733, doi: 10.1029/2020JF005733 (PDF)
  24. Present, T. M., Adkins, J. F., Fischer, W. W., 2020, Variability in sulfur isotope records of Phanerozoic seawater sulfate. Geophysical Research Letters, v. 47, no. 18, e2020GL088766, doi: 10.1029/2020GL088766 (PDF)
  25. Fernandes, A. M., Abeyta, A., Mahon, R. C., Martindale, R., Bergmann, K. D., Jackson, C., Present, T. M., Reano, D., Swanson, T., Butler, K., Brisson, S., Johnson, C., Mohrig, D., Blum, M. D., 2020, "Enriching Lives within Sedimentary Geology": Actionable Recommendations for Making SEPM a Diverse, Equitable and Inclusive Society for All Sedimentary Geologists. The Sedimentary Record, v. 18, no. 3, p. 4-12, doi: 10.2110/sedred.2020.3 (PDF)
  26. Paris, G., Fischer, W. W., Johnson, J. E., Webb., S. M., Present, T. M., Sessions, A. L., Adkins, J. F., 2020, Deposition of sulfate aerosols with positive Δ33S in the Neoarchean. Geochimica et Cosmochimica Acta, v. 285, p. 1-20, doi: 10.1016/j.gca.2020.06.028 (PDF)
  27. Present, T. M., Gutierrez, M.*, Paris, G., Kerans, C., Grotzinger, J. P., Adkins, J. F., 2019, Diagenetic controls on the isotopic composition of carbonate-associated sulfate in the Permian Capitan Reef complex, West Texas. Sedimentology, v. 66, no. 7, p. 2605-2626, doi: 10.1111/sed.12615 (PDF) [2019 Sedimentology Editors' Pick]
  28. Present, T. M., Bergmann, K. D., Myers, C. E., Slotznick, S. P., Creveling, J. R., Zieg, J., Fischer W. W., Knoll, A. H., Grotzinger J. P., 2017, Pyrite-walled tube structures in a Mesoproterozoic sediment-hosted metal sulfide deposit. Geological Society of America Bulletin, v. 130, no. 3-4, p. 598-616, doi: 10.1130/B31504.1 (PDF)
  29. Trower, E. J., Cantine, M. D., Gomes, M. L., Grotzinger, J. P., Knoll, A. H., Lamb, M. P., Lingappa, U., O'Reilly, S. S., Present, T. M., Stein, N., Strauss, J. V., Fischer, W. W., 2018, Active ooid growth driven by sediment transport in a high energy shoal, Little Ambergris Cay, Turks and Caicos, British Overseas Territories. Journal of Sedimentary Research, v. 88, no. 9, p. 1132-1151, doi: 10.2110/jsr.2018.59 (PDF)
  30. Burke, A., Present, T. M., Paris, G., Rae, E. C., Sandilands, B. H., Gaillardet, J., Peucker-Ehrenbrink, B., Fischer, W. W., Voss, B. M., McClelland, J. W., Spencer, R. G., Adkins, J. F., 2018, Sulfur isotopes in rivers: Insights into global weathering budgets, pyrite oxidation, and the modern sulfur cycle. Earth & Planetary Science Letters, v. 496, p. 168-177, doi: 10.1016/j.epsl.2018.05.022 (PDF)
  31. Present, T. M., Paris, G., Burke, A., Fischer, W. W., Adkins, J. F., 2015, Large Carbonate Associated Sulfate isotopic variability between brachiopods, micrite, and other sedimentary components in Late Ordovician strata. Earth & Planetary Science Letters, v. 432, p. 187-198, doi: 10.1016/j.epsl.2015.10.005 (PDF)