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Post-doctoral, 1990-91, Research Associate, Department of Geology, Texas A&M University , College Station , TX (Advisor “ Ethan Grossman)

Ph.D. (Geology), 1990, Texas Tech University , Lubbock , Texas (Advisor “ James Barrick)

M.Sc. (Geology), 1985, University of Alberta , Edmonton , Alberta (Advisor “ Brian Chatterton)

B.S. (Geology, Biology Minor), 1982, Allegheny College , Meadville , Pennsylvania

2000- Professor, Department of Geological Sciences, SUNY College at µÚÒ»³Ô¹ÏÍø, µÚÒ»³Ô¹ÏÍø , NY

1996-2000 Associate Professor, Department of Geological Sciences, SUNY College at µÚÒ»³Ô¹ÏÍø, µÚÒ»³Ô¹ÏÍø , NY

1991-1996 Assistant Professor, Department of Geological Sciences, SUNY College at µÚÒ»³Ô¹ÏÍø, µÚÒ»³Ô¹ÏÍø , NY

1990-1991 Visiting Assistant Professor/Research Associate, Department of Geology, Texas A&M University , College Station , TX

1989-1990 Instructor, Department of Geosciences, Texas Tech University , Lubbock , TX

Tankersley, J., 2026, Pipe Creek Formation geochemistry

McCarthy, J., 2026, Long Rapids conodonts

Britt, R., 2026, Cleveland Shale cycles

Adorante, S., 2026, Hanover Formation MS

Moskaluk, A., 2024, Astrochronology in the Dyer Formation

Higgins, F., 2023, Millennial scale cycles in the Hanover Formation (honors thesis)

Otto, C., 2021, Sub-precession cycles in the Hanover Formation

Crampton, C., 2021, Oswayo Formation

Minkovsky, A., 2020, History of Life lab videos

Booth, S., 2020, Catskill carbonates (honors thesis)

Zaffino, N, 2020, Clinton tentaculitids

O™Connor, A., 2020, Kettle Point MS

National Science Foundation – Collaborative Research: Integrated Late Devonian Earth evolution: Diverse perspectives on ocean-climate-biosphere interaction from Laurentia and Gondwana. $104, 601, 11/01/2024-10/31/2027, w/L. Nana Yobo, Texas A&M, G. Gilleaudeau and M. Rodriguez George Mason Univ., and A. Kaufman Univ of Maryland, $860,400.

Fulbright U.S. Scholar Program, Czech Republic 12155-EZ. Collaborative studies and teaching in Geological Sciences: astrochronology and the Hangenberg global crisis, $19,200, 09/22-12/22.

National Science Foundation- Collaborative Research at Undergraduate Institutions: Testing hypotheses for Late Devonian biotic and climatic events via high-precision CA-TIMS U-Pb zircon dating and quantitative correlation tools. $98,223, w/M. Schmitz and V. Davydov, Boise State University, $188,968, 9/11-6/15.

Keck Geology Consortium NSF-REU: Paleobiogeographic Reconstruction of the Gobi-Altai Terrane, Mongolia, project faculty member, 2/09-4/10.

Petroleum Research Fund-American Chemical Society: Eifelian-Givetian boundary (Middle Devonian) in eastern North America, $50,000, PI, 9/05-8/10.

Chancellor™s Award for Excellence in Scholarship and Creative Activities, State University of New York, 10/03.

Lockhart Professor of Geological Sciences, SUNY-µÚÒ»³Ô¹ÏÍø, 2000-2003.

National Science Foundation-Research at Undergraduate Institutions: Upper Devonian black shales, $3,000 supplement to EAR-9614314, 8/99.

Chancellor™s Award for Excellence in Teaching, State University of New York, 8/98.

National Science Foundation-Research at Undergraduate Institutions: Upper Devonian black shales in eastern North America , conodont biostratigraphy, Frasnian-Famennian mass extinction horizon, and absolute dates from associated ash layers, $75,000, PI, 2/97-12/01.

Refereed Journals/Volumes 2026-2015 (Student Authors):

Over, D.J., Waid, C.B.T., Brett, C.E., Ruggiero, J.A., Farruggia, V.C., Ver Straeten, C.A., and Danielsen, E.M., Recognition of the Middle Devonian Eifelian-Givetian Boundary utilizing conodonts and magnetic susceptibility in the Marcellus subgroup, New York, and Delaware Formation, Ohio, USA; in press Palaeobiodiversity and Palaeoenvironments.

Huygh, J.C., Algeo, T.J., Sageman, B.B., Arts, M., Ver Straeten, C.A., Over, D.J., Sablon, L., Crucifix, M., and Da Silva, A.-C. 2026. Astronomical control on marine anoxia during the Kellwasser Crisis and Rhinestreet Event (Appalachian Basin, New York, USA). Global and Planetary Change, 257, doi.org/10.1016/j.gloplacha.2025.105216

Algeo, T. J., Remírez, M. N., Zhao, H.; Schwark, L., Gordon, G., Anbar, A., Bates, S., Lyons, T., Over, D. J., and Sageman, B. 2025. Transient glacio-eustatic fall and its climato-829 environmental effects during the Frasnian-Famennian transition. Global and Planetary Change, doi: 10.1016/j.gloplacha.2025.105135.

Over, D.J. (editor), 2025, Proceedings with Program and Abstracts. Subcommission on Devonian Stratigraphy and IGCP Reading Geological Time in Paleozoic Sedimentary Rocks. Bulletins of American Paleontology, No. 411, 136 p.

Over, D.J., and Mason, C.E., 2024, Palmatolepis expansa Zone and Bispathodus aculeatus aculeatus Zone conodonts from the Three Lick Bed at the type locality, Ohio Shale, Upper Devonian, eastern Kentucky. Journal of the Geological Society, doi.org/10.1144/jgs2024-125

Remirez, M.N., Gilleaudeau, G.J., Elrick, M., Henderson, M.A., Over, D.J., Willette, D.C., and Algeo, T.A. 2023. Linking anoxia, biotic events, and basin evolution in the Late Devonian Illinois Basin, North America: A geochemical approach. Marine and Petroleum Geology, 158, doi.org/10.1016/j.marpetgeo.2023.106556.

Over, D.J., Baird, G.C., and Kirchgasser, W.T., 2023, The Frasnian Strata – lower Upper Devonian – of New York State. In Ver Straeten, C.A., Over, D.J., and Woodrow, D.L., eds., Devonian of New York, Vol. 3, Bulletins of American Paleontology, 407-408, 1-28.

Baird, G.C., Harper, J.A., Over, D.J., Hannibal, J.T., McKenzie, S.C., and Tesmer, I.H., 2023, Late Famennian Conneaut Group to basal Mississippian stratigraphic succession and geochronology, New York/Pennsylvania borderland and Lake Erie region. In Ver Straeten, C.A., Over, D.J., and Woodrow, D.L., eds., Devonian of New York, Vol. 3, Bulletins of American Paleontology, 407-408, 113-209.

Ver Straeten, C.A., Brett, C.E., Baird, G.C., Bartholomew, A.J., and Over, D.J., 2023, Lower Middle Devonian (Eifelian-lower Givetian) strata of New York State: The Onondaga Formation and Marcellus subgroup. In Ver Straeten, C.A., Over, D.J., and Woodrow, D.L., eds., Devonian of New York, Vol. 1, Bulletins of American Paleontology, 403-404, 205-280.

Liu, Z., Tian, H., Selby, D., Hu, J., and Over, D.J., 2022, Organic geochemistry evidence for wildfire and elevated pO2 at the Frasnian-Famennian boundary. Global and Planetary Change, v. 217:

Hagadorn, J.W., Lahey, B.L., Soar, L.K., Longman, M.W., Over, D.J., and Mills, R.D., 2022, Insights into the Devonian-Carboniferous transition and Hangenberg Event from δ13C carb and 87Sr/86Sr chemostratigraphyof shallow platform carbonate strata of northwestern Colorado. Rocky Mountain Geologist, v. 57(1), p. 23-33.

Hagadorn, J.W., Lahey, B.L., Soar, L.K., Longman, M.W., Over, D.J., and Mills, R.D., 2022, Insights into the Devonian-Carboniferous transition and Hangenberg Event from δ13C carb and 87Sr/86Sr chemostratigraphyof shallow platform carbonate strata of northwestern Colorado. Rocky Mountain Geologist, v. 57(1), p. 23-33.

Harrigan, C.O., Schmitz, M.D., Over, D.J., Trayler, R.B., and Davydov, V.L., 2022, Recalibrating the Devonian timescale: A new method for integrating radioisotopic and astrochronology ages in a Bayesian framework. Geological Society of America Bulletin, 134 (7-8), p. 1931-1948.

Over, D.J., Wistort, Z., Soar, L.K., Bullecks, C.J., and Hagadorn, J.W., 2021, Conodonts and the Devonian-Carboniferous transition in the Dyer formation, Colorado, USA. Rocky Mountain Geologist, v. 56(2), p. 51-67.

Over, D. J. 2021. The Devonian-Carboniferous boundary in the United States.Palaeobiodiversity and Palaeoenvironments, v. 101, p. 529-540.

Zhang, X., Over, D.J., and Gong, Y. 2021. Famennian conodonts from the Hongguleleng Formation at the Bulongguoer stratotype section, western Junggar, northwest China. Paleoworld (2021), doi:

Pas, D., da Silva, A.C., Over, D.J., Brett, C.E., Brandt, L., Over, J.S., Hilgen, F.J., and Dekkers, M.J., 2020, Cyclostratigraphic calibration of the Eifelian Stage (Middle Devonian, Appalachian Basin, western New York, USA). Geological Society of America Bulletin,

Song, Y., Gilleaudeau, G., Algeo, T.J. Over, D.J., Lyons, T.W., Anbar, A.D., and Xie, S. 2020. . Bulletin of the Geological Society of America,

Ver Straeten, C.A., Over, D.J., and Baird, G.C. 2020. Arc-to-craton: Devonian air-fall tephras in the eastern United States, in Avary, K.L., Hasson, K.O., and Diecchio, R.J., eds., The Appalachian Geology of John M. Dennison: Rocks, People, and a Few Good Restaurants along the Way. Geological Society of America Special Paper 545, p. 35“53, .

Liu, Z., Selby, D., Hackley, P., and Over, D.J. 2020. Evidence of wildfires and elevated atmospheric oxygen at the Frasnian-Famennian boundary in New York (USA): implications for the Late Devonian mass extinction. Geological Society of America Bulletin, ;

Kendall, B., Wang, J., Zheng, W., Romaniello, S.J., Over, D.J., Bennett, Y., Xing, L., Kunert, A., Boyes, C., and Liu, J. 2020. Inverse correlation between the molybdenum and uranium isotope compositions of Upper Devonian black shales caused by changes in local depositional conditions rather than global ocean redox variations. Geochemica et Cosmochamica Acta,

Ver Straeten, C., Brett, C., Baird, G., Boyer, D., Lindemann, R., Ivany, L., Over, D.J., Witzke, B. 2019. Shallow-water onlap model for the deposition of Devonian black shales in New York, USA “ Forum Comment. Geology, v. 47(12), p. 495

Zhang, X., Joachimski, M.M., Over, D.J., Ma, K., Huang, C., and Gong, Y. 2019. Late Devonian carbon isotope chemostratigraphy: a new record from the offshore facies of south China. Global and Planetary Change, doi: 10.1016/j.gloplacha.2019.103024

Zhang, X., Over, D.J., Ma, K., and Gong, Y. 2019, Upper Devonian conodont zonation, sea-level changes and bio-events in offshore carbonate facies Lali section, South China. Palaeogeography, Palaeoclimatology, Palaeoecology, v. 531,

Over, D.J., Hauf, E., Wallace, J., Chiarello, J., Over, J.-S., Gilleaudeau, G, Yi, S., Algeo, T. 2019. Conodont biostratigraphy and magnetic susceptibility of Upper Devonian Chattanooga Shale, eastern United States: evidence for episodic deposition and disconformities. Palaeogeography, Palaeoclimatology, Palaeoecology, v. 524, p. 137-149.

Over, D.J. and Henderson, C.M. (editors), 2018. Conodont Studies Dedicated to the Careers and Contributions of Anita Harris, Glen Merrill, Carl Rexroad, Walter Sweet, and Bruce Wardlaw. Bulletins of American Paleontology, Ithaca, NY, Numbers 395-396, 198 p.

Bush, A.M., Beard, A., Baird, G., Over, D.J., Tuskes, K., Brisson, S.K., and Pier, J.Q., 2017. A2 and B2: Upper Devonian Kellwasser extinction events in New York and Pennsylvania: offshore to onshore transect across the Frasnian-Famennian Boundary of the eastern margin of the Appalachian Basin, p. 82-124. In Muller, O.H. (ed.), Field Trip Guidebook, New York Geological Association 89th Annual Meeting, Alfred University,

Spalletta, C., Perri, M.C., Over, D.J., and Corradini, C., 2017, Famennian (Upper Devonian) conodont zonation: revised global standard. Bulletin of Geosciences, v. 92, p. 31-57.

Danielsen, E.M., Over, D.J., Baird, G.C., and Ver Straeten, C.A., 2017, The Marcellus subgroup in the type area, central New York State. Stratigraphy, v. 13, p. 155-162. [imprint 2016]

Corradini C., Spalletta C., Mossoni, A., Matyja, H., and Over, D.J., 2016. Conodonts across the Devonian/Carboniferous boundary: a review and implication for the redefinition of the boundary and proposal of an updated conodont zonation. Geological Magazine, 154(4): 888-902. DOI: 10.1017/S001675681600039X

Lanik, A., Over, D.J., Schmitz, M.D., and Kirchgasser, W.T., 2016, Testing the limits of chronostratigraphic resolution in the Appalachian Basin, Upper Devonian (Middle Frasnian), eastern North America: new U-Pb zircon dates for the Belpre Tephra Suite. Geological Society of America Bulletin, 10.1130/B31408.1

Whalen, M.T., de Vleeschouwer, D., Sliwinski, M., Day, J.E., Over, D.J., and Claeys, P., 2016, Pattern and timing of the Late Devonian biotic crisis in western Canada: insight from carbon isotopes and astronomical calibration of magnetic susceptibility data. SEPM Special Publication No. 107, 10.2110/sepmsp.107.02

Danielsen, E.M., and Over, D.J., 2016, Early Silurian conodonts from the Shine Jinst region of southwestern Mongolia. Journal of Paleontology, v. 90. p. 78-91.

Wade, C., and Over, D.J., 2016, Aeronian (Llandovery, Silurian) conodonts from the Densmore Creek Phosphate Bed and the Budd Road Phosphate Bed, Clinton Group, western New York State. Canadian Journal of Earth Sciences, v. 53, p. 645-650, 10.1139/cjes-2015-0140

Sullivan, N., Over, D.J., Chuluun, M., and Myrow, P., 2016. Subsidence and the drowning of a carbonate platform in south-central Mongolia (Gobi Altai Region) during the Late Eifelian to Early Givetian: A synthesis of biostratigraphy, magnetic susceptibility, and paleoecology. Journal of Asian Earth Sciences, v. 115, p. 204-213

Bush, A.M., Csonka, J.D., DiRenzo, G.V., Over, D.J., and Beard, A., 2015, Revised correlation of the Frasnian-Famennian boundary and Kellwasser events (Late Devonian) in shallow marine paleoenvironments of New York State. Palaeogeography, Palaeoclimatology, Palaeoecology 433, p. 233“246.