Publications
* Undergraduate student author (CofC)
** Graduate student author
In Review/Revision
3. Newby, S.M., Young, S.A., Them, T.R. II, Gill, B.C., Owens, J.D., (in review), OAE redox budgets. For: Proceedings of the National Academy of Sciences.
2. Hasty, B.J., Them, T.R. II, Zheng, W., *Luksch, C.L., *Knight, M.D., Owens, J.D., Sullivan, D., Rico, K.I., Anbar, A.D., (in revision), Neoarchean ocean oxygenation stimulated by volcanically enhanced pyrite burial: insights from mercury geochemistry. For: Geology.
1. Them, T.R. II, *Meier, C.L., Tino, C.J., *Knight, M.D., Hancock, L.G., Behl, R.J., Lyons, T.W. (in revision), Organic-rich shales reveal local controls that enhanced mercury accumulation during the Miocene: Implications for the mercury paleoproxy. For: American Journal of Science.
Preparing for Submission
1. Them, T.R. II, Marroquín, S.M., Gill, B.C., *Knight, M.D., Golding, M.L., Owens, J.D., Trabucho Alexandre, J.P., Veenma, Y.P., Caruthers, A.H., Gröcke, D.R. (in prep), Triassic-Jurassic mercury geochemistry. For: Global and Planetary Change.
2024
25. Paine, A.R, Fendley, I.M., Frieling, J., Mather, T.A., Lacey, J.H., Wagner, B., Robinson, S.A., Pyle, D.M., Francke, A., Them, T.R. II, Panagiotopoulos, K., 2024, Mercury records covering the past 90000 years from lakes Prespa and Ohrid, SE Europe, Biogeosciences, 21, 531-556.
2023
24. Yuan, W., Liu, M., Chen, D., Xing, Y.-W., Spicer, R.A., Chen, J., Them, T.R. II, Wang, X., Li, S., Guo, C., Zhang, G., Zhang, L., Zhang, H., Feng, X., 2023, Mercury isotopes show vascular plants colonized land extensively by the early Silurian, Science Advances, 9, eade9510.
See accompanied press release in EurekAlert!
2022
23. Them, T.R. II, Owens, J.D., Marroquín, S.M., Caruthers, A.H., Trabucho Alexandre, J.P., Gill, B.C., 2022, Reduced marine molybdenum inventory related to enhanced organic carbon burial and an expansion of reducing environments in the Toarcian (Early Jurassic) oceans, AGU Advances, 3, e2022AV000671. Data archived here at Open Science Framework.
See accompanied press releases from the College of Charleston and Florida State University.
See Editor’s Highlight in Eos.
22. **Kozik, N.P., Young, S.A., Newby, S.M., Liu, M., Chen, D., Hammarlund, E., Bond, D.P.G., Them, T.R. II, Owens, J.D., 2022, Rapid marine oxygen variability: Driver of the Late Ordovician Mass Extinction, Science Advances, 8, eabn8345.
See accompanied press release from Florida State University.
21. **Veenma, Y.P., McCabe, K., Caruthers, A.H., Aberhan, M., Golding, M., Marroquín, S.M., Owens, J.D., Them T.R. II, Gill, B.C., Trabucho Alexandre, J.P., 2022, The glass ramp of Wrangellia: Late Triassic to Early Jurassic outer ramp environments of the McCarthy Formation, Alaska, Journal of Sedimentary Research, 22, 896 – 919.
20. Liu, W., Liu, M., Yang, T., Liu X., Them T.R. II, Wang, K., Bian, C., Meng, Q., Li, Y., Zeng, X., Zhao W., 2022, Organic matter accumulations in the Santonian-Campanian (Upper Cretaceous) lacustrine Nenjiang shale (K2n) in the Songliao Basin, NE China: terrestrial responses to OAE3?, International Journal of Coal Geology, 260, 104069.
19. Caruthers, A.H., Marroquín, S.M., Gröcke, D.R., Golding, M., Aberhan, M., Them T.R. II, Veenma, Y.P., Owens, J.D., McRoberts, C.A., Friedman, R.M., Trop, J.M., Szúcs, D., Pálfy, J., Rioux, M., Trabucho Alexandre, J.P.,Gill, B.C., 2022, New evidence for a long Rhaetian from a Panthalassan section (Wrangell Mountains, Alaska) and regional differences in carbon cycle perturbations at the Triassic-Jurassic transition, Earth and Planetary Science Letters, 577, 117262.
2021
18. Bowman, C.N., Them T.R. II, *Knight, M.D., Kaljo, D., Eriksson, M.E., Hints, O., Martma, T., Owens, J.D., Young, S.A., 2021, A multi-proxy approach to constrain reducing conditions in the Baltic Basin during the late Silurian Lau carbon isotope excursion, Palaeogeography Palaeoclimatology Palaeoecology, 581, 110624.
17. Liu, M., Ji, C., Hu, H., Xia, G., Yi, H.,Them T.R. II, Sun, P, Chen, D., 2021, Variations in microbial ecology during the Toarcian Oceanic Anoxic Event (Early Jurassic) in the Qingtang Basin, Tibet: evidence from biomarker and carbon isotopes, Palaeogeography Palaeoclimatology Palaeoecology, 580, 110626.
2020
16. Shen, J., Feng, Q., Algeo, T., Liu, J., Zhou, C., Wei, W., Liu, J., Them T.R. II, Gill, B.C., Chen, J., 2020, Sedimentary host phases of mercury (Hg) and implications for use of Hg as a volcanic proxy, Earth and Planetary Science Letters, 543, 116333.
15. Liu, M., Sun, P, Them, T.R. II, Li, Y., Sun, S., Gao, X., Tang, Y., 2020, Organic geochemistry of a lacustrine shale across the Toarcian Oceanic Anoxic Event (Early Jurassic) from NE China, Global and Planetary Change, 191, 103214.
14. Sardar Abadi, M., Owens, J.D., Liu, X., Them T.R. II, Cui, X., Heavens, N., Soreghan, G.S., 2020, Atmospheric dust stimulated marine primary productivity during Earth’s penultimate icehouse, Geology, 48 (3), 247 – 251.
2019
13. Moore, C.R., Brooks, M.J., Goodyear, A.C., Ferguson, T.A., Perrotti, A.G., Mitra, S., Listecki, A.M., King, B.C., Mallinson, D.J., Lane, C.S., Knapp, J.D., West, A., Carlson, D.L., Wolbach, W.S., Them T.R. II, Harris, S.M., Pyne-O’Donnell, S., 2019, Sediment cores from White Pond, South Carolina, contain a platinum anomaly, biomass burning peak, and coprophilous spore decline at 12.8 ka, Scientific Reports, 9:15121. One of top 100 downloaded papers for Scientific Reports in 2019.
12. **Liu, M., Chen, D., Zhou, X., Tang, D., Them T.R. II, Jiang, M., 2019, Upper Ordovician marine red limestones, Tarim basin, NW China: A product of an oxygenated deep ocean and changing climate?, Global and Planetary Change, 183, 103032.
11. **Bowman, C.N., Young S.A., Kaljo D., Eriksson M.E, Them T.R. II, Hints O., Martma T., Owens J.D., 2019, Linking the progressive expansion of reducing conditions to a stepwise mass extinction event in the late Silurian oceans, Geology, 47 (10), 968 – 972.
10. Grasby, S.E., Them, T.R. II, Chen, Z., Yin, R., Ardakani, O.H., 2019, Mercury as a proxy for volcanic emissions in the geologic record, Earth-Science Reviews, 196, 102880.
9. **Kozik, N.P., Young, S.A., **Bowman, C.N., Saltzman, M.R., Them II, T.R., 2019, Middle-Upper Ordovician (Darriwilian-Sandbian) paired carbon and sulfur isotope stratigraphy from the Appalachian Basin, USA: Implications for dynamic redox conditions spanning the peak of the Great Ordovician Biodiversification Event, Palaeogeography Palaeoclimatology Palaeoecology, 520, 188 – 202.
8. Them, T.R. II, Jagoe, C., Gill, B.C., Caruthers, A.H., Grasby, S.E., Gröcke, D.R., Yin, R., Owens, J.D., 2019, Terrestrial sources as the primary delivery mechanism of mercury to the oceans across the Toarcian Oceanic Anoxic Event (Early Jurassic), Earth and Planetary Science Letters, 507, 62 – 72.
2018
7. Them, T.R. II, Gill, B.C., Caruthers, A.H., Gerhardt, A.M., Gröcke, D.R., Lyons, T.W., **Marroquín, S.M., Nielsen, S.G., Trabucho Alexandre, J.P., Owens, J.D., 2018, Thallium isotopes reveal protracted anoxia during the Toarcian (Early Jurassic) associated with volcanism, carbon burial, and mass extinction, Proceedings of the National Academy of Sciences, 115 (26), 6596 – 6601.
Also see accompanying article: Owens, J.D., Them, T.R. II, Volcanic eruptions once caused mass extinctions in the oceans – could climate change do the same? Published in The Conversation, November 13, 2018.
6. Caruthers, A.H., Smith, P.L., Gröcke, D.R., Gill, B.C.,Them II, T.R., Trabucho Alexandre, J., 2018, Pliensbachian-Toarcian (Early Jurassic) Ammonoids from the Luning Embayment, West-Central Nevada, U.S.A., Bulletins of American Paleontology, No. 393, 84 pp.
2017
5. Them, T.R. II, Gill, B.C., Selby, D., Gröcke, D.R., Friedman, R.M., Owens, J.D., 2017, Evidence for rapid weathering response to climatic warming during the Toarcian Oceanic Anoxic Event, Scientific Reports, 7:5003.
4. Martindale, R.C., Them, T.R. II, Gill, B.C., **Marroquín, S.M., Knoll, A.H., 2017, A new Early Jurassic fossil Lagerstätte from Ya Ha Tinda, Canada (~183 Ma), Geology, 45, 255 – 258.
3. Them, T.R. II, Gill, B.C., Caruthers, A.H., Gröcke, D.R., *Tulsky, E.T., Martindale, R.C., Poulton, T.P., Smith, P.L., 2017, High-resolution carbon isotope records of the Toarcian Oceanic Anoxic Event (Early Jurassic) from North America and implications for the global drivers of the Toarcian carbon cycle, Earth and Planetary Science Letters, 459, 118 – 126.
2015
2. Them, T.R. II, Schmidt, M.W., and Lynch-Stieglitz, J., 2015, Millennial-scale tropical atmospheric and Atlantic Ocean circulation change from the Last Glacial Maximum and Marine Isotope Stage 3, Earth and Planetary Science Letters, 427, 47 – 56.
2012
1. Schmidt, M.W., Chang, P., Hertzberg, J.E., Them II, T.R., Ji, L., and Otto-Bliesner, B.L., 2012, Impact of abrupt deglacial climate change on tropical Atlantic subsurface temperatures, Proceedings of the National Academy of Sciences, 109 (36), 14348 – 14352.