Bownocker Distinguished Lecture Series


John Adams Bownocker was the Chair of the Ohio State Department of Geology and State Geologist of Ohio (1906-1928), preceded by Edward Orton Sr. and Edward Orton Jr. In his last will and testament Professor Bownocker established the Bownocker Endowment, providing funds to bring luminaries in theories of evolution, plate tectonics, and climate science to Ohio State. Thanks to Professor Bownocker's generosity, the School of Earth Sciences has hosted 77 visionary earth scientists since the series' inception in 1937.

headshot of Professor John Adams Bownocker
Professor John Adams Bownocker
John Adams Bownocker's geological map of Ohio
Bownocker’s Geologic Map of Ohio (1920)
stood as Ohio's primary geologic reference map for 86 years.



Interested in supporting the Bownocker Endowment (fund #600679)? Click here for more information.


Bownocker Lectures through the years

1937  Alfred C. Lane

1938  Walter H. Bucher

1939  Reginald A. Daly

1940  Charles K. Leith

1941  Arthur L. Day

1942  George F. Kay

1943  O. D. von Englen

1945  Max W. Ball

1946  George G. Simpson

1947  Chester R. Longwell

1948  Hugh D. Miser

1950  Harold C. Urey

1951  James Gilluly

1952  Sidney Paige

1953  M. M. Leighton

1954  F. A. Vening-Meinesz

1956  J Harlen Bretz

1957  J. L. Gillson

1958  F. J. Pettijohn

1959  Norman D. Newell

1960  Philip B. King

1961  Alfred S. Romer

1962  Charles H. Behre, Jr.

1963  John W. Wells

1964  J. Tuzo Wilson

1965  K. O. Emery

1966  F. H. T. Rhodes

1967  Richard Foster Flint

1968  Cesare Emiliani

1969  Allan V. Cox

1970  Valter Schytt

1971  Preston E. Cloud

1972  S. Keith Runcorn

1974  Peter J. Wyllie                                                                                        

1975  John Rodgers

1976  John F. Dewey

1977  Harold Masursky

1978  Robert F. Legget

1979  Harold Williams

1980  Ursula B. Marvin

1981  W. Gary Ernst

1982  J. William Schopf

1983  Robert L. Folk

1984  Kenneth J. Hsü

1985  Luna B. Leopold

1986  Anthony J. Naldrett

1987  Hans P. Eugster

1988  Digby J. McLaren

1989  Paul F. Hoffman

1990  Albert W. Bally

1991  Adolf Seilacher

1992  William R. Dickinson

1995  James D. Hays

1996  Harrison H. Schmidt

1997  Ian W.D. Dalziel

1998  Steven M. Stanley

1999  George M. Hornberger

2000  Wallace S. Broecker

2001  Robert A. Berner

2002  Lonnie G. Thompson

2003  Mary Lou Zoback

2004  Albert A. Gore Jr.

2005  Andrew H. Knoll

2006  Guust Nolet

2007  Noel P. James

2008  James E. Hansen

2009 Derek E.G. Briggs

2011  Roberta Rudnick

2012  James Head

2013  Louise Kellogg

2014 Susan Solomon

2015 Diane McKnight

2016 Lucy Jones

2017 Kathy Sullivan

2018 Kevin Trenberth

2019 John Grotzinger

2020 Naomi Oreskes (recorded lectures available here)

2022 Lindy Elkins-Tanton


The School of Earth Sciences hosted Naomi Oreskes, Harvard Professor of History of Science and Earth Science, as the 77th annual Bownocker Distinguished Lecturer (and first ever virtual one!). Naomi is an author of “Merchants of Doubt”, which is a well-known book (also turned into a film) about scientific consensus and dissent in relation to climate change. Her 2004 essay "The Scientific Consensus on Climate Change" in the journal Science is widely cited, and she has done a TED talk on these topics. Naomi is a Precambrian geologist by training and has written a book on the theory of continental drift.

Public Lecture: Why trust science?


Technical Lecture: How military funding delayed the development of plate tectonics.

Lindy Elkins-Tanton headshot

The School of Earth Sciences will be hosting Lindy Elkins-Tanton, Foundation and Regents Professor in the School of Earth and Space Exploration at Arizona State University, as the 78th annual Bownocker Distinguished Lecturer. She is also the vice president of the ASU Interplanetary Initiative, and the Principal Investigator (PI) of the Psyche mission, selected in 2017 as the 14th in NASA’s Discovery program.

Her research includes theory, observation, and experiments concerning terrestrial planetary formation, magma oceans, and subsequent planetary evolution including magmatism and interactions between rocky planets and their atmospheres. She also promotes and participates in education initiatives, in particular, inquiry and exploration teaching methodologies, and leadership and team-building for scientists and engineers.

She has led four field expeditions in Siberia, as well as participated in fieldwork in the Sierra Nevada, the Cascades, Iceland, and the Faroe Islands.

Professor Elkins-Tanton received her bachelor's and master's degrees from MIT in 1987, and then spent eight years working in business, with five years spent writing business plans for young high-tech ventures. She then returned to MIT for a doctorate. She spent five years as a researcher at Brown University, followed by five years on MIT faculty, before accepting the directorship of the Department of Terrestrial Magnetism at the Carnegie Institution for Science. In 2014, she moved to the directorship at Arizona State University. 

She serves on the Standing Review Board for the Europa mission, and served on the Mars panel of the Planetary Decadal Survey and on the Mars 2020 Rover Science Definition Team.

Professor Elkins-Tanton is a two-time National Academy of Sciences Kavli Frontiers of Science Fellow and served on the National Academy of Sciences Decadal Survey Mars panel. In 2008 she was awarded a five-year National Science Foundation CAREER award, and in 2009 was named Outstanding MIT Faculty Undergraduate Research Mentor. In 2010 she was awarded the Explorers Club Lowell Thomas prize. The second edition of her six-book series "The Solar System," a reference series for libraries, was published in 2010; the book "Earth," co-authored with Jeffrey Cohen, was published in 2017; and Harper Collins published her memoir, "A Portrait of the Scientist as a Young Woman" in 2022. Asteroid (8252) Elkins-Tanton was named for her.

In 2013 she was named the Astor Fellow at Oxford University, in 2016 she was named a fellow of the American Geophysical Union, and in 2018 a member of the American Academy of Arts and Sciences. In 2020 the National Academy of Sciences awarded her the Arthur L. Day Prize and Lectureship, and in 2021 she was elected to the National Academy of Sciences.


Public Lecture | The NASA Psyche Mission: An Electric Journey to a Metal World

Date: November 3, 2022

Time: 8:00PM - 10:00PM

Location: Sullivant Hall RM220 (1813 N High St, Columbus, OH 43210)

“Psyche” is both the name of an asteroid in the main belt, orbiting out past Mars, and the name of our NASA mission to visit that asteroid. Our upcoming exploration of this asteroid marks an important first for humankind: We have sent people or robots to explore rocks bodies, like the Moon and Mars, and icy ones, like Europa and Enceladus, and gas-rich bodies like Jupiter, but never a body made mostly of metal. Psyche’s density, radar, and reflected light properties indicate that it is largely made of metal. If Psyche turns out to be what we think, we’ll be visiting a new kind of world.

In this talk, I’ll explain how a NASA mission comes to be, who is working on our team, and how far we’ve come in building this spacecraft and preparing to launch in 2023.

Psyche will surprise us. The universe always outsteps even our best imaginations. And our whole Psyche team looks forward to sharing all we discover with everyone here on Earth.


Technical Lecture | Volcanoes and the Great Dying: The end-Permian extinction

Date: November 4, 2022

Time: 1:45PM - 3:00PM

Location: Jennings Hall Room 355 (1735 Neil Ave Columbus, OH 43210)

Around 252 million years ago the Siberian flood basalts intruded into and erupted onto the Siberian craton, producing about three million cubic kilometers of lava. The flood basalt event is among several possible causes of the end-Permian extinction, the largest extinction in Earth's history. About a decade ago we assembled an interdisciplinary team of scientists from eight countries to make progress on whether the similar ages of the volcanism and the extinction were coincidence or causality.

Some researchers had suggested there is no connection between the basalts at the extinction. Others hypothesized that only carbon dioxide release was important. Our team also hypothesized that the magmas caused the injection of sufficient volatiles into the atmosphere to produce global climate change, but we found evidence for a far broader spectrum of chemicals. In Siberia, the magmas intruded a 12-km-deep evaporate basin containing hydrocarbon reservoirs. The complex interactions of heat and rock with silicate, hydrous, and hydrocarbon fluids produced rich ore bodies, a variety of magmatic rocks including carbonatites, and significant volumes of carbon, sulfur, chlorine, and fluorine-bearing volatiles.

Through five field seasons in Siberia, laboratory analysis of samples, and using of climate models based on field and laboratory data, we have tested our hypotheses. With surprising parallels with the current day, extinction at the end-Permian was likely caused by chemical changes in the atmosphere that radically altered climate and atmospheric and ocean chemistry.