Professor of Geology


  • B.A., Carleton College, 1984
  • M.Sc., University of Arizona 1987
  • Ph.D., University of California-Santa Barbara, 1995

Curriculum vitae

Research metrics:   Scopus  //   Research Gate     //   Google Scholar  //  Academia

Media items:   Nature Careers  //   Science news   //  Ars Technica   //  Wikipedia

Current Projects and Federal Grants

Ice sheet erosional Interaction with Hot geotherm (ICI-Hot) in West Antarctica

Testing the linchpin for WAIS collapse using diatoms and IRD in Pleistocene and Late Pliocene strata of the Resolution Drift, Amundsen Sea, Antarctica

Integrated System Understanding of Ross Ice Shelf Evolution Over the Past Two Millennia [RISS2K; pending]

IODP 379, 2019-2021 Amundsen Sea – West Antarctic Ice Sheet History

Collaborative Research: A systems approach to understanding the Ross Ocean and ice Shelf Environment, and Tectonic setting Through Aerogeophysical surveys and modeling (ROSETTA-ICE)

Emplacement mechanism, paleoenvironment of formation, and lithification/fluid migration history of Neoproterozoic siliciclastics and injectites , Colorado Front Range

Geodesign at Colorado College – International Geodesign Collaborative

Recent Publications

Siddoway, C., 2020 in press, Geology of West Antarctica (invited chapter), in Kleinschmidt, G., ed., Geology of the Antarctic Continent. Stuttgart: Gebrüder Borntraeger Verlagsbuchhandlung.

Flowers, R. M., Macdonald, FA., Siddoway, C.S., and Havranek, R., 2020, Diachronous development of the Great Unconformity prior to Snowball Earth, Proceedings of the National Academy of Sciences,

Jordan, T.A., Riley, T.R. and Siddoway, C., 2020, Geology of West Antarctica, Nature Reviews Earth and Environment, doi:10.1038/s43017-019-0013-6.

Siddoway, C., Palladino, G., Prosser, G., Freedman, D., and Duckworth, W. C., 2019, Basement-hosted sand injectites: Use of field examples to advance understanding of hydrocarbon reservoirs in fractured crystalline basement rocks, in Bowman, M. (ed.), Subsurface Sand Remobilization and Injection, Geological Society of London Special Publication 493, doi: 10.1144/SP493-2018-140.

Colleoni, F., De Santis, L., Siddoway, C.S., Bergamasco, A., Golledge, N., Lohmann, G., Passchier, S. and Siegert, M., 2018, Spatio-temporal variability of processes across Antarctic ice-bed-ocean interfaces, Nature Communications, v. 9, 2289.

Courses taught currently

GY100   In Extinction'sEmbrace: Geological Perspectives on Climate Nonfiction
GY140   Physical Geology
GY212   Investigating Earth as a Physical System 
GY250   Topics in Geology: Introduction to Geodesign
GY315   Structural Geology
GY316   Field analysis of Geological Structures
GY445   Regional Studies in Geology [location varies]
GY405   Research Topics in Geology (student research/investigation of primary geological problems)

More on Teaching and Research Mentoring

Research Interests:   Structural and metamorphic geology; tectonic development of West Antarctica and New Zealand within Gondwana; Rocky Mountains tectonics; the role of melt in deformation of migmatites; sandstone injectites.

Geological evolution of Antarctica

Cryogenian Sedimentary Rocks of Colorado

Siddoway family:     Colorado College has another professor by the name of Siddoway, and you guessed it, the two of us are married. Mike teaches Mathematics. If you are seeking the Prof. Siddoway whose research is in divisibility theory of arithmetical rings, or who presently is teaching History of Mathematics at Montana State University, you can reach Mike’s professional web page here.  To reach Mike, email him at


Christine with field assistant, Pearl