(Photo © Gigi Cohen)

Dr. Stephen R. Meyers
Associate Professor
Department of Geoscience

Ph.D., Northwestern University, 2003

Research Areas:
Paleoclimatology & Paleoceanography, Quantitative Stratigraphy, Sedimentary Geochemistry, Computational Statistics & Data Analysis

Download Curriculum Vitae

VIEW Google Scholar Citations

The 12th International Conference on Paleoceanography, Utrecht, September 2, 2016

Astrochron: A Computational Tool for Astrochronology

The latest public beta of Astrochron (version 0.6.5) is available for download from CRAN.

If you use Astrochron, please cite it as:
Meyers, S.R. (2014). Astrochron: An R Package for Astrochronology. http://cran.r-project.org/package=astrochron

For more information about Astrochron, please go HERE.

My research program primarily addresses three topics: the mechanisms of climate change, the controls on the global carbon cycle, and the measurement of geologic time. These subjects are fundamentally interrelated, as there are linkages between climate and the carbon cycle, while the establishment of reliable chronologies is essential for evaluating climate forcing mechanisms and determining rates of climatic and biogeochemical change in Earth's past. My interdisciplinary approach to investigating these topics integrates data (primarily geochemical, sedimentologic and stratigraphic) with novel modeling and statistical techniques, to unravel the history of the climate system, oceans and geosphere.

While I am involved in a wide range of geoscience research, at present I am especially active in the development of quantitative approaches for the construction and evaluation of astronomical time scales, the intercalibration of astrochronologic and radioisotopic data, and the evaluation of Earth System responses to orbital-insolation changes.

The Global Boundary Stratotype Section and Point (GSSP) dedication ceremony on October 25, 2013 at Lake Pueblo State Park (Colorado) was a component of award NSF-EAR 0959108, which created a new intercalibrated radioisotopic and astrochronologic time scale for the Cenomanian-Turonian boundary interval. Clockwise from left: (1) installation of the "Golden Spike" marking the Late Cretaceous Cenomanian-Turonian boundary (dated at ~94 million years ago); (2) view from the "Golden Spike" (photo courtesy M. Leckie); (3) with colleagues Brad Singer (UW-Madison, left) and Brad Sageman (Northwestern Univ., center), collaborators on the project (photo courtesy B. Sageman); (4) one of several panels created for the GSSP display.


  • CAREER: Deciphering the Beat of a Timeless Rhythm - The Future of Astrochronology, Stephen Meyers (PI), NSF Sedimentary Geology and Paleobiology Program. (view abstract)
  • Collaborative Research: Evolution of the Climate Continuum- Late Paleogene to Present, Stephen Meyers (Lead-PI) and Linda Hinnov (Co-PI), NSF Paleo Perspectives on Climate Change (Lead program Marine Geology and Geophysics). (view abstract)
  • Collaborative Research: Integrating Radioisotopic and Astronomical Time Scales for the Cretaceous, Bradley Singer (Lead-PI), Stephen Meyers (Co-PI), and Bradley Sageman (Co-PI), NSF Sedimentary Geology and Paleobiology Program. (view abstract)


    Kristin Larkins (M.S., 2009):"Cyclic Sedimentation in the Mississippian Pride Shale: Quantitative Paleoenvironmental Analysis of Tidal Rhythmites Using X-Ray Fluorescence Scanning and Advanced Spectral Methods" (with L. Bartek)

    Bo He (M.S., 2010):"Evaluation of the Diagenetic Role of Iron as a Sulfide Buffer at Cape Lookout Bight, North Carolina (USA)" (with M. Alperin)

    Dylan Malynn (M.S., 2011):"Evaluation of Linkages Between Climate Change and Sedimentary Biogeochemistry in the Glacial/interglacial North Atlantic"

    Chao Ma (M.S., 2012):"Testing the Astronomical Time Scale for Oceanic Anoxic Event 2, and its Extension into Cenomanian Strata of the Western Interior Basin (U.S.A.)"

    Wesley Ingram (Ph.D., 2013):"Late Quaternary Depositional History, Sedimentary Geochemistry, and Organic Carbon Burial at Mississippi Canyon 118: A Deep-sea Site on the Northern Gulf of Mexico Slope Containing a Gas-Hydrate and Cold-Seep Field"

    Miao Du (M.S., 2013):"Comparing Nonlinear Climate Responses to Orbital-Insolation during the Early Miocene and Pleistocene: A Bicoherence Study"

    Andrew Walters (M.S., 2013):"Cyclostratigraphic Evaluation of Repetitive Sedimentary Microfacies from the Green River Formation, Utah" (with A. Carroll)

    Wasinee Aswasereelert (Ph.D., 2014):"Astronomical and Stochastic Influences on Lacustrine and Marine Environments during the Cenozoic: Case Studies from the Green River Formation (Eocene) and the World’s Ocean (Late Paleogene-Present)" (with A. Carroll)

    M'bark Baddouh (Ph.D., 2016):"Application of Strontium Isotopes in Paleoclimatology, Paleohydrology and Chemostratigraphy: The Eocene Green River Formation, Wyoming" (with A. Carroll)

    Lindsey Shanks (M.S., 2016):"On the Recurrence of Enigmatic Nannoplankton Blooms in the Subtropical South Atlantic during the Early Oligocene" (with C. Kelly)

    Chao Ma (Ph.D., 2016):"Centennial to Million-year Scale Climate Cycles in the Late Cretaceous Western Interior Seaway: Their Implications for Geochronology, Paleoceanography, and Celestial Mechanics"

    Andrew Walters (Ph.D. Candidate):Underway...

    Page last updated October 11, 2016

    Unless otherwise noted, all content © S. Meyers