Thomas E. Yancey

Thomas E. Yancey

Professor Emeritus

Paleontology, Stratigraphy, Molluscan fossils, Late Paleozoic, Cenozoic

  (979) 845-0643

  Halbouty 167


Study of paleoenvironments of Carboniferous and Permian marine biotas.

Systematics of late Paleozoic molluscan faunas, especially bivalves of Devonian to Triassic age.

Study of Carboniferous biota of the Buckhorn exceptional biota of south Oklahoma.

Study of stratigraphy and depositional environments of Paleogene deposits of northern Gulf of Mexico coastal plains.

Radiometric dating of Paleogene volcanic ash deposits of northern Gulf of Mexico coastal plains.

Study of the Chicxulub impact event marine shelf deposits of the northern Gulf of Mexico.

Selected Publications

Junium, C.K., Zerkle, A.L., Witts, J.D., Ivany, L.C., Liu, C., Yancey, T.E., and Claire, M.W., Massive perturbations to atmospheric sulfur in the aftermath of the Chicxulub impact, 2022, PNAS

Jordan, B.R., Yancey, T.E., Heinrich, P.V., Miller, B.V., and McGuire, K., 2019, The Age and Geochemistry of Volcanic Ash in the Catahoula Formation of Louisiana, Mississippi, and Texas, USA, The Journal of Geology v. 127, no. 2 (March 2019), p. 207-222.

Yancey, T.E., Heizler, M.T., Miller, B.V., and Guillemette, R.N., 2018, Eocene–Oligocene chronostratigraphy of ignimbrite flareup volcanic ash beds on the Gulf of Mexico coastal plains; Geosphere, v.14,n. 2, 21 p., 34 p

Flis, J.E., Yancey, T.E., and Flis, C.J.,2017,  Middle Eocene storm deposition in the northwest Gulf of Mexico, Burleson County, Texas, U.S.A., GCAGS Journal, v. 6, 21 p.

Wahl, P.J., Yancey, T.E., Pope, M.C., Miller, B.V., and Ayers, W.B., 2016, U-Pb detrital zircon geochronology of the Upper Paleocene to Lower Eocene Wilcox Group, east-central Texas; Geosphere, v. 12, no. 5, 15 p. doi: 10.1130/GES01313.1

Yancey, T.E. & Heintz, M.L., 2015, Rates of Sediment Deposition During the Late Eocene of Central Texas Based on 40Ar/39Ar Dating of Volcanic Ash; GCAGS Transaction, v. 65, p. 421-425

Heintz, M.L., Yancey, T.E., Miller, B.V., and Heizler, M.T., 2015, Tephrochronology and geochemistry of Eocene and Oligocene volcanic ashes of east and central Texas; Geological Society of America Bulletin, v. 127, p.770-780   doi:10.1130/B31146.1

Yancey, T.E., Mustoe, G.E., Leopold, E.G., and Heizler, M.T., 2013, Mudflow disturbance in latest Miocene forests in Lewis County, Washington; Palaios, v. 28,p. 343-358.  doi: 10.2110/palo.2012.p12-063r

Yancey, T.E., and Liu, C., 2013, Impact-Induced Sediment Deposition On An Offshore, Mud-Substrate Continental Shelf, Cretaceous–Paleogene Boundary, Brazos River, Texas, U.S.A; Journal of Sedimentary Research, v. 83, n.4, p. 354-367

Hart, M.B., Yancey, T.E., Leighton, A.D., Miller, B., Liu, C., Smart, C.W. and Twitchett, R.J., 2012, The Cretaceous-Paleogene boundary on the Brazos River, Texas: New stratigraphic sections and revised interpretations; Gulf Coast Association of Geological Societies, GCAGS Journal, v. 1, p. 69-80.

Yancey, T.E., Dunham, A. and Durney, K., 2012, Paleocene-Eocene marine transgression in the Upper Calvert Bluff Formation, Wilcox Group, Bastrop County, Texas; Gulf Coast Association of Geological Societies, Transactions, v. 62, p. 491-502.

Hendricks, J.K., Yancey, T.E., Flis, J.E., Flis, C.J. and Grossman, E.L., 2012, Formation of barrel concretions around methane seepage pathways in Upper Middle Eocene shelf sediments, Stone City Bluff, Texas; Gulf Coast Association of Geological Societies, Transactions, v. 62, p. 179-188.

McBride, E.F., Folk, R.L. and Yancey, T.E., 2012, Silica-cemented sandstones (groundwater silcretes) in outcrops of the Jackson Group, Texas coastal plain; Gulf Coast Association of Geological Societies, Transactions, v. 62, p. 273-285.

Wilson, M.A., Vinn, O. and Yancey, T.E., 2011, A new reef-forming microconchid tubeworm from the Lower Permian (Artinskian) of central Texas, USA; Acta Palaeontologia Polonica, vol. 56, p. 785-791

Yancey, T.E. and Garvie, C.L., 2011, Redescription of Anomalosaepia (Cephalopoda: Coleoida): a sepioid with a bimineralic calcite and aragonite skeleton; Journal of Paleontology, v. 85, p. 904-915

Yancey, T.E., Hull, T.F. and Dickey, R.L., 2010, Depositional environments of sediments near the Paleocene-Eocene boundary, Bastrop, Texas; Gulf Coast Association of Geological Societies, Transactions, vol. 60, p. 679-691

Dickey, R.L. and Yancey, T.E., 2010, Palynological age control sediments bracketing the Paleocene-Eocene boundary, Bastrop, Texas; Gulf Coast Association of Geological Societies, Transactions, vol. 60, p. 717-724

Yancey, T.E., Garvie, C.L. and Wicksten, M., 2010, The Middle Eocene Belosaepia ungula (Cephalopoda: Coleoida) from Texas: structure, ontogeny and function; Journal of Paleontology, v. 84, p. 267-287

Yancey, T.E., Wilson, M.A. & Mione, A.C.S., 2009, The ramonalinids: A new family of mound-building bivalves of the Early Middle Triassic; Palaeontology, v. 52, p. 1349-136

Seuss, B., Nutzel, A., Mapes, R.H., Yancey, T.E., 2009, Facies and fauna of the Pennsylvanian Buckhorn Asphalt Quarry deposit: a review and new data on an important Palaeozoic fossil Lagerstatte with aragonite preservation; Facies, v. 55, p. 609-645, doi. 10.1007/s10347-009-0181-9

Yancey, T.E. and Guillemette, R.N., 2008, Carbonate accretionary lapilli in distal deposits of the Chicxulub impact event; Geological Society of America Bulletin, v. 120, p. 1105-1118.

Grossman, E.L., Yancey, T.E., Jones, T.E., Bruckschen, P., Chuvashov, B., Mazzullo, S.J., Mii, H-S., 2008, Glaciation, aridification, and carbon sequestration in the Permo-Carboniferous: The isotopic record from low latitudes; Palaeogeography, Palaeoclimatology, Palaeoecology, v.  268, pages 222-233.

Yancey, T. E., Stanley, G. D., Jr., Piller, W. E., and Woods, M. A., 2005, Biogeography of the Late Triassic wallowaconchid megalodontoid bivalves; Lethaia, v. 38, p. 351-365.

O’Keefe, J. M. K., Sancay, R. H., Raymond, A. L., and Yancey, T. E., 2005, A Comparison of Late Paleocene and Late Eocene Lignite Depositional Systems Using Palynology, Upper Wilcox and Upper Jackson Groups, East-Central Texas, in Warwick, P.D., ed., Coal systems analysis; Geological Society of America Special Paper 387, p. 59-71.

Yancey, T. E., Elsik, W. C., and Sancay, R. H., 2003, The palynological record of Late Eocene climate change, northwest Gulf of Mexico, in Prothero, D. R., Ivany, L. C., and Nesbitt, E. A., eds; From Greenhouse to Icehouse - the marine Eocene-Oligocene transition, Columbia University Press, New York, New York, p. 252-268

Bandel, K., Nutzel, A., & Yancey, T. E., 2002, Larval shells and shell microstructures of exceptionally well-preserved Late Carboniferous gastropods from the Buckhorn Asphalt deposit (Oklahoma, USA); Senckenbergiana Lethaea, v. 82, p. 639-689.

Grossman, E.L., Bruckschen, P., Mii, H-S., Chuvashov, B.I., Yancey, T.E., and Veizer, J., 2002. Carboniferous paleoclimate and global change: Isotopic evidence from the Russian Platform. In Carboniferous stratigraphy and Paleogeography in Eurasia. Institute of Geology and Geochemistry, Russian Academy of Sciences, Urals Branch, Ekaterinburg, p. 61-71.

Hoare, R. D., Mapes, R. H. & Yancey, T. E., 2002, Structure, taxonomy, and epifauna of Pennsylvanian rostroconchs (Mollusca); The Paleontological Society, Memoir 58, 30 p.

Kobashi, T., Grossman, E. L., Yancey, T. E., & Dockery, D. T., III, 2001, Reevaluation of conflicting Eocene tropical temperature estimates: molluskan oxygen isotope evidence for warm low latitudes; Geology, v. 29, p. 983-986.

Mii, H.-S., Grossman, E. L., Yancey, T. E., Chuvashov, B., & Egorov, A., 2001, Isotopic records of brachiopod shells from the Russian Platform -- evidence for the onset of mid-Carboniferous glaciation; Chemical Geology, v.175, p. 133-147.

Elsik, W. C., & Yancey, T. E., 2000(2001), Palynomorph biozones in the context of changing paleoclimate, middle Eocene to lower Oligocene of the northwest Gulf of Mexico; Palynology, v. 24, p. 177-186.

Yancey, T.E., & Heaney, M.J., III, 2000, Carboniferous praecardioid bivalves from the exceptional Buckhorn Asphalt biota of south-central Oklahoma, USA, in Harper, E.M., Taylor, J.D. & Crame, J.A. (eds), The Evolutionary Biology of the Bivalvia; Geological Society London, Special Publications, n. 177, p. 291-301.

Yang, Z. and Yancey, T. E., 2000, Fusulinid biostratigraphy and paleontology of the middle Permian (Guadalupian) strata of the Glass Mountains and Del Norte Mountains, west Texas; Smithsonian Contributions to the Earth Sciences, no. 32, p. 185-259.

Mii, H.-S., Grossman, E. L., and Yancey, T. E., 1999, Carboniferous isotope stratigraphies of North America: Implications for Carboniferous paleoceanography and Mississippian glaciation; Bulletin of the Geological Society of America, v. 111, p. 960-973.

Yancey, T. E., and Stanley, G. D., Jr., 1999, Giant alatoform bivalves in the upper Triassic of western North America; Palaeontology, v. 42, p. 1-23.

Yancey, T. E., and Guillemette, R., 1998, Major volcanic ash units in the Late Eocene of east Texas; Gulf Coast Association of Geological Societies Transactions, v. 48, p. 511-516.

Heymann, D., Yancey, T.E., Wolbach, W.S., Thiemens, M.H., Johnson, E.A., Roach, D., & Moecker, S., 1998, Geochemical markers of the Cretaceous-Tertiary boundary event at Brazos River, Texas, USA; Geochimica et Cosmochimica Acta, v. 62, p. 173-181.

Yancey, T.E., 1997, Depositional environments of Late Eocene lignite-bearing strata, east-central Texas; International Journal of Coal Geology, v. 34, p. 261-175.

Mii, H.-S., Grossman, E.L. & Yancey, T.E., 1997, Stable carbon and oxygen isotope shifts in Permian seas of West Spitsbergen - Global change or diagenetic artifact?; Geology, v. 25, p. 227-230.

Heymann, D., Yancey, T.E., Wolbach, W.S., Johnson, E.A., Roach, D., & Moecker, S., 1997, Carbon in sediments at the KT boundary site of the Brazos River, Texas; Lunar and Planetary Science 28, v. 2, p. 567-568.

Yancey, T.E., 1996, Stratigraphy and depositional environments of the Cretaceous-Tertiary boundary complex and basal Paleocene section, Brazos River, Texas; Gulf Coast Association of Geological Societies, Transactions, vol. 46, p. 433-442.

Guillemette, R. & Yancey, T.E., 1996, Composition and provenance of volcanic glass in Late Eocene Manning Formation, east-central Texas; Gulf Coast Association of Geological Societies, Transactions, vol. 46, p. 159-166.

Grossman, E.L., Mii, H.S., Zhang, C., & Yancey, T.E., 1996, Chemical variation in Pennsylvanian brachiopod shells - diagenetic, taxonomic, microstructurall, and seasonal effects; Journal of Sedimentary Research, vol. 66, p. 1011-1022.

Yancey, T.E., 1995, Depositional trends in siliciclastic deposits of the Stone City transgressive systems tract, middle Eocene, Texas; Gulf Coast Association of Geological Societies, Transactions, vol. 45, p. 581-586.

Grossman, E. L., Mii, H.S., and Yancey, T. E., 1993, Stable isotopes in late Pennsylvanian brachiopods from the United States: implications for Carbonifereous paleoceangraphy; Bulletin of the Geological Society of America, v. 105, p. 1284-1296.

Davidoff, A.J., and Yancey, T.E., 1993, Eustatic cyclicity in the Paleocene and Eocene: data from the Brazos River Valley, Texas; Tectonophysics, v. 222, p. 371-396.

Grossman, E. L., Zhang, C., and Yancey, T. E., 1991, Stable-isotope stratigraphy of brachiopods from Pennsylvanian shales in Texas; Bulletin of the Geological Society of America, v. 103, p. 953-965.

Stevens, C. H., Yancey, T. E., and Hanger, R. A., 1990, Significance of the provincial signature of Early Permian faunas of the eastern Klamath terrane, in  Harwood, D. S., and Miller, M. M., eds., Paleozoic and early Mesozoic paleogeographic relations; Sierra Nevada, Klamath Mountains, and related terranes; Geological Society of America, Special Paper 255, p. 201-218.

Yancey, T. E., 1985, Bivalvia of the H. S. Lee Formation (Permian) of Malaysia; Journal of Paleontology, vol. 59, p. 1286-1297, Sept. 1985.

Yancey, T. E., & Boyd, D. W.,1983, Revision of the Alatoconchidae:  a remarkable family of Permian bivalves; Palaeontology, vol. 26, p. 497-520, July, 1983.

Yancey, T. E., & Stevens, C. H., 1981, Early Permian fossil communities in northeastern Nevada and northwestern Utah, in  Gray, J. and Boucot, A. J., eds., Communities through time, Chapter 9; Dowden, Hutchinson & Ross, p. 243-269.

Yancey, T. E., 1978, Stratigraphy of the Plio-Pleistocene strata in the Twelve mile Creek area, San Francisco Peninsula, California; California Academy of Sciences, Proceedings, 4th Series, vol. 41, no. 15, p. 357-370.

Yancey, T. E., 1978, Brachiopods and molluscs of the Lower Permian Arcturus Group, Nevada and Utah.  Part 1:  Brachiopods, Scaphopods, Rostroconchs and Bivalves; Bulletins of American Paleontology, vol. 74, no. 303, p. 257-367.


University of California, Berkeley, Calif, Ph.D. 1971


Distinguished Teaching Award of Association of Former Students, Texas A&M University, 1984.

Dorothy K. Palmer Memorial Prize in Paleontology, University of California, Berkeley, 1971.

Chauncey Holmes Plaque in elementary geology, Syracuse University, 1962

Additional Information

Multi-decade collaboration with stable isotope geochemists on stratigraphy and paleontology of fossil sample specimens.

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