Lawrence H Tanner, Ph.D.
- Professor Biological and Environmental Sciences
- Director, Center for the Study of Environmental Change Carroll College of Arts & Sciences
Much of my professional work focuses on the paleogeography and paleoclimate of the Late Paleozoic and Mesozoic world. This research examines the environmental conditions (climatic, atmospheric, etc.) as dinosaurs rose to ascendancy in the Late Triassic, the record and causes of extinctions for the early Mesozoic, and the global environmental processes responsible for mass extinctions in general. Primarily, this research is conducted through field studies (sedimentology and stratigraphy) of early Mesozoic formations in the Four Corners area.
Education
Ph.D. (1990) University of Massachusetts at Amherst
M.S. (1980) University of Tulsa
B.A. (1978) Williams College
Areas of Specialization
Most importantly, I have a passionate concern for the rapidly changing environment of our Earth. Anthropogenic forcing of climate change, habitat loss and pollution threaten the Earth with a mass extinction event of a magnitude not seen since the end of the Mesozoic Era. I encourage solidarity between scientists, environmental action groups and faith traditions in addressing these concerns.
The realization that modern climate change and habitat loss are already having a significant impact on ecology drives my research with Le Moyne students investigating changes in soil and plant communities and carbon cycle dynamics in both laboratory experiments and field research in such diverse locations as Iceland and Costa Rica. Currently, I am using my endowed professorship to investigate ecological trends (mainly primary succession) on the forelands of the retreating glaciers of Iceland (see recent publications below).
My lab includes analytical equipment for studying rock and soil compositions (Bruker D2 Phaser X-ray diffractometer and a JEOL JSM-6510LV scanning electron microscope). For studies of soil carbon flux we have a Li-Cor 8100 soil CO2 chamber system.
Awards and Honors
Rev. Richard M. McKeon, S.J., Scholar of the Year 2012
Louis D. De Gennaro, Ph.D., Undergraduate Mentor Award 2013
Joseph C. Georg Endowed Professorship 2018-2021
Publications
Please see my CV for a complete listing of 100+ publications, some of which are available on ResearchGate.
Latest Book: The Late Triassic World: Earth in a Time of Transition, Springer International Topics in Geobiology Series 46 (2018).
Latest Articles: * denotes Le Moyne student (or former student) co-author
El-Kahtanya, K., Faroukb, S., Ahmad, F., Tanner, L., Mohammed, I., 2024. Facies associations and stratigraphic sequence of the Dhruma Formation (Middle Jurassic) at its type locality, Khashm adh Dhibi, Saudi Arabia. Carbonates and Evaporites, 39:9, https://doi.org/10.1007/s13146-023-00917-2.
Tanner, L.H., Kikukawa, G.*, Weits, K.*, 2023. Albedo on a glacial foreland at ground level and landscape scale driven by vegetation-substrate patterns. European Journal of Environmental Sciences, 13(2), 71-79.
Tanner, L.H., Lucas, S.G., 2023. Record of palaeoclimate across the Cretaceous–Palaeogene boundary from palaeosols in the west-central San Juan Basin, New Mexico, USA. The Depositional Record, DOI: 10.1002/dep2.251.
Lawa, F.A., Mohammed, I., Farouk, S., Ahmad, F., Faris, M., Tanner, L., Al-Kahtany, K., 2023. Stratigraphic architecture of the Tethyan Cenomanian-Turonian succession and OAE2 in the Dokan Area, Kurdistan Region, northeast Iraq. Journal of African Earth Sciences 207: https://doi.org/10.1016/j.jafrearsci.2023.105064.
Wanas, H.A., Tanner, L.H., Khalifa, M.M., Mousa, F.A., Plio-Pleistocene continental carbonates and silcretes in Wadi El-Natrun, NW Egypt: Their morphology and paleoenvironmental significance. Journal of African Earth Sciences, 198: https://doi.org/10.1016/j.jafrearsci.2022.104813.
Tanner, L.H., Lucas, S.G., 2023. Record of palaeoclimate across the Cretaceous–Palaeogene boundary from palaeosols in the west-central San Juan Basin, New Mexico, USA. The Depositional Record, DOI: 10.1002/dep2.251.
Lawa, F.A., Mohammed, I., Farouk, S., Ahmad, F., Faris, M., Tanner, L., Al-Kahtany, K., 2023. Stratigraphic architecture of the Tethyan Cenomanian-Turonian succession and OAE2 in the Dokan Area, Kurdistan Region, northeast Iraq. Journal of African Earth Sciences 207: https://doi.org/10.1016/j.jafrearsci.2023.105064.
Wanas, H.A., Tanner, L.H., Khalifa, M.M., Mousa, F.A., Plio-Pleistocene continental carbonates and silcretes in Wadi El-Natrun, NW Egypt: Their morphology and paleoenvironmental significance. Journal of African Earth Sciences, 198: https://doi.org/10.1016/j.jafrearsci.2022.104813.
Synan, H.E.*, Melfi, M.A.*, Tanner, L.H., 2021. Spatial and temporal dynamics of growth of woody plant species (birch and willows) on the foreland of a retreating glacier in southern Iceland. Ecological Processes. https://https://ecologicalprocesses.springeropen.com/articles/10.1186/s13717-021-00282-9
Tanner, L.H., Kyte, F.T., Puffer, John, H., 2020. Widespread elevated iridium in Upper Triassic–Lower Jurassic strata of the Newark Supergroup: implications for use as an extinction marker. Scientific Reports, https://doi.org/10.1038/s41598-020-76238-4
Tanner, L.H., Lucas, 2020. The isotopic composition of pedogenic carbonate as a record of pCO2: Insights from the Late Paleozoic of tropical western Pangea, Ch. 10. In: Monenari, M. (ed.) Carbon Isotope Stratigraphy, Elsevier Time and Stratigraphy, Vol. 5, p. 529-565.
Rigo, M., Onoue, T., Tanner, L.H., Lucas, S.G., Godfrey, L., Katz, M.E., Zaffania, M., Grice,
K., Cesar, J., Yamashita, D., Marona, M., Tackett, L.S., Campbell, H., Tateo, F., Concheri, F.,
Agnini, C., Chiari, M., Bertinelli, A., 2020. The Late Triassic Extinction at the Norian/Rhaetian boundary: Biotic evidence and geochemical signature. Earth-Science Reviews 240, 103180.
Tanner, L.H., Vandewarker, M.M.*, 2019. Significance of vegetation cover differences on albedo and soil carbon on a basaltic sandplain in southern Iceland. AIMS Environmental Science 6(6): 435–444. DOI: 10.3934/environsci.2019.6.435
Palmer, C.A.*, Markstein, K.P.*, Tanner, L.H., 2019. Experimental test of temperature and moisture controls on the rate of microbial decomposition of soil organic matter: preliminary results. AIMS Geoscience 5(4): 886–898. DOI: 10.3934/geosci.2019.4.886
Glausen, T.G.*, Tanner, L.H., 2019. Successional trends and processes on a glacial foreland in Southern Iceland studied by repeated species counts. Ecological Processes 8:11. doi.org/10.1186/s13717-019-0165-9.
Tanner, L.H., Lucas, S.G., 2018. Pedogenic record of climate change across the Pennsylvanian-
Permian boundary in red-bed strata of the Cutler Group, northern New Mexico, USA. Sedimentary Geology 373: 98-110.
Tanner, L.H., 2018. Climates of the Late Triassic: perspectives, proxies and problems. In: Tanner, L.H. (ed.), The Late Triassic World: Earth in a Time of Transition. Springer, Topics in Geobiology 46: 59-90.
Lucas, S.G., Tanner, L.H., 2018. The missing mass extinction at the Triassic-Jurassic boundary. In: Tanner, L.H. (ed.), The Late Triassic World: Earth in a Time of Transition. Springer, Topics in Geobiology 46: 721-785.
Clutson, M.J., Brown, D.E., Tanner, L.H., 2018. Distal processes and effects of multiple Late Triassic terrestrial bolide impacts: Insights from the Norian Manicouagan event, northeastern Quebec, Canada Tanner, L.H. (ed.), The Late Triassic World: Earth in a Time of Transition. Springer, Topics in Geobiology 46: 127-187.
Lucas, S.G., Tanner, L.H., 2018. Record of the Carnian wet episode in strata of the Chinle Group, western USA. Journal of the Geological Society doi.org/10.1144/jgs2017-134.
Galli, G.K., Buchwaldt, R., Lucas, S.G., Tanner, L.H., 2018. New chemical abrasion thermal ionization mass spectrometry dates from the Brushy Basin Member, Morrison Formation, Western Colorado: Implications for dinosaur evolution. Journal of Geology 126, DOI: 10.1086/699208.
