General Information:
About Us:
CU Boulder Webpages:

    Contact Information:

    Stephen J. Mojzsis

    Professor of Geology & Geochemistry
    Department of Geological Sciences
    University of Colorado at Boulder
    Benson Earth Sciences
    2200 Colorado Avenue
    Boulder, Co. 80309
    office: 303-492-5014
    lab: 303-735-5021
    fax: (303) 492-2606


    A UROP prize was just awarded to Cole Pazar in our lab! Congrats Cole!

    Let's congratulate Wilder Lavington for obtaining a UROP Assistantship! Way to go Wilder!

    We are very proud to announce that our recent alum Dr. Michelle Hopkins starts as a new faculty member at Santa Monica College in January 2015

    Congratulations go out to our own Dr. Elizabeth Frank who begins her MESSENGER postdoc at the Carnegie Institution of Washington's Department of Terrestrial Magnetism (DTM) November, 2014

    This September (2014), we completed stage #3 of field work (mapping and sampling) of outcrops of the Hadean-Eoarchean Inukjuak domain (Quebec, Canada). Stay tuned for results


  • A radiogenic heating evolution model for cosmochemically Earth-like exoplanets With Brad Meyer at Clemson University, we have constructed a galactic chemical evolution model for the production of U, Th, K and rock-forming elements in planets over galactic time.
  • Impact environment of the Hadean Earth With Oleg Abramov (USGS) and David Kring (LPI), we review models for the thermal fields in Earth's crust that would have been generated in the bombardment epoch.
  • Component geochronology of the polyphase ca. 3920 Ma Acasta Gneiss With our collaborators we report a comprehensive analysis of the geology, age and origin of the petrogenetically diverse Acasta Gneiss Complex (NWT, Canada).

  • Lu-Hf isotope systematics of the Hadean-Eoarchean Acasta Gneiss Complex In this work, we present new Lu-Hf isotope whole-rock measurements of different Acasta Gneiss components, and show that the oldest of these rocks carry information about the mantle-crust system in the Hadean.
  • The longevity and residence time of the early terrestrial crust from combined Sm-Nd systematics Here, we report the first resolvable anomalies in 142N/144Nd for the Acasta Gneisses and use this information to explore the extent of crust recycling in the first few hundred million years.
  • Cobalt and marine redox evolution This project investigated how changes in the surface redox state of the Earth - associated with the GOE - affected the availability of Cobalt to the microbial biosphere.
  • COURSES OFFERED (click on a link to access the course website):

    GEOL 1020: Introduction to Geology 1 (some years)
    GEOL 1020: Historical Geology & Earth System History (alternate years)
    ASTR/GEOL 2040: Search for Life in the Universe (next offered Spring 2015)
    GEOL 4500: Critical Thinking in Earth Sciences: Origin of Life (some years)
    GEOL 4700/5700: Archean and Proterozoic Geology (some years)
  • GEOL 4330/5330: Cosmochemistry (Fall 2014)
    ASTR/ATOC/GEOL 5835: Planetary Seminar (some years)
    GEOL 5700: Special Topics: Geobiology (some years; co-taught with Prof. Templeton)
    ASTR/GEOL 5700: Planetary Field Geology (offered Fall semester every year)
    ASTR/GEOL 5800 Planetary Surfaces & Interiors (last offered Fall 2013)
    ASTR/ATOC/GEOL 5830: Geology, Age and Origin of the Moon (last offered Spring 2011)

[Ukalik site, September 2014]

University of Colorado at Boulder
University of Colorado at Boulder

Graduate Program in Planetary Sciences
Graduate Program in Planetary Sciences

Department of Geological Sciences, University of Colorado
Department of Geological Sciences

The Center for Astrobiology at the University of Colorado
The Center for Astrobiology

Laboratory for Atmospheric and Space Physics at the University of Colorado
Laboratory for Atmospheric and Space Physics

CU Geophysics Program
Geophysics Program