Christine Siddoway

Christine Siddoway
Born (1961-12-26)December 26, 1961
Nationality USA
Other names Christine Helen Smith, Christine H. Smith, Christine Smith Siddoway
Alma mater BSc Carleton College
MSc University of Arizona
PhD University of California-Santa Barbara
Awards Fellow of the Geological Society of America
Antarctic Service Medal
Scientific career
Fields Structural geology
Tectonics
Institutions Colorado College
Website sites.coloradocollege.edu/csiddoway/

Christine Siddoway is an American Antarctic researcher, best known for her work on the geology and tectonics of the Ford Ranges in western Marie Byrd Land.[1][2]

Early life and education

Siddoway completed her undergraduate education at Carleton College. Siddoway received a master's degree from the University of Arizona, then attended the University of California, Santa Barbara where she earned her Ph.D.[3] Her dissertation focused on the only known gneiss dome in Antarctica, in the Fosdick Mountains, Marie Byrd Land. As graduate student, she began the first of a series of studies in the Fosdick Metamorphic Complex in Marie Byrd Land with her PhD advisor and project principle investigator Bruce Luyendyk.[4][5]

Career and impact

Siddoway’s career includes multiple research seasons in the Antarctic since 1989.[6] The central issue was when and how mid crustal rocks found here became exhumed. Her work demonstrated a role for doming and diapir intrusion, within a regional context of right lateral strike slip—leading to a model of rapid exhumation via transtension rather than orthogonal extension as in a core complex – that had been the working model that proved to be incorrect.[7] She continued to refine the fundamentals of the process of gneiss dome emplacement authoring a special publication on that topic with the Fosdick range as a type model.[8] An outgrowth of the early work explored the Fosdick Mountains gneiss dome as a repository of information about crustal differentiation leading to stabilization of the landmass of Marie Byrd Land within the Antarctic continent.[9]

Siddoway co-founded the ANTscape project[10] which aims to reconstruct the bedrock topography of Antarctica in the geologic past – an important parameter for understanding ice sheet evolution on the continent.

Siddoway’s Antarctic work has been funded almost exclusively by the U.S. National Science Foundation, with three NSF grants received over five years.[6] The most recent is a collaboration with other researchers from Columbia, UC San Diego, and Oregon State, mostly women, to study the framework of the Ross Ice Shelf and Embayment ([ROSETTA]-ice).[11] This is project includes airborne geophysics and on-ground investigations and is funded by the National Science Foundation and the Moore Foundation.[12]

Along with her work in Antarctica, Siddoway has pursued a research program centered on the tectonics of the Front Range in the Colorado Rocky Mountains.[13][14][15] This work led to a surprising result for the age of Cryogenian sandstone dikes within granite host rock, a matter that had been unresolved for more than 125 years.[13][16]

Siddoway has served on committees of the Geological Society of America, including as Associate Editor for the GSA Bulletin.[17] She has also served twice on the Organizing Committee for the International Symposium on Antarctic Earth Sciences (1995, 2007) and on the Transantarctic Mountain Science Planning Committee (2015).[18]

Awards and honours

Siddoway was elected a Fellow of the Geological Society of America in 2009[19] and received the Antarctica Service Medal in 2003.[20]

Selected works

  • Stone, J.O., Balco, G.A., Sugden, D.E., Caffee, M.W., Sass, L.C., Cowdery, S.G. and Siddoway, C., 2003. Holocene deglaciation of Marie Byrd land, west Antarctica. Science, 299 (5603), pp. 99–102. DOI:10.1126/science.1077998
  • Luyendyk, B.P., Wilson, D.S. and Siddoway, C.S., 2003. Eastern margin of the Ross Sea Rift in western Marie Byrd Land, Antarctica: Crustal structure and tectonic development. Geochemistry, Geophysics, Geosystems, 4(10). DOI:10.1029/2002GC000462
  • Siddoway, C.S., Baldwin, S.L., Fitzgerald, P.G., Fanning, C.M. and Luyendyk, B.P., 2004. Ross Sea mylonites and the timing of intracontinental extension within the West Antarctic rift system. Geology, 32 (1), pp. 57–60. DOI:10.1130/G20005.1
  • Siddoway, C. S., 2008 "Tectonics of the West Antarctic Rift System: new light on the history and dynamics of distributed intracontinental extension." Antarctica: A Keystone in a Changing World: 91-114. DOI: 10.3133/of2007-1047.kp09
  • Siddoway, C.S., 2010 "Microplate motion" Nature Geoscience: 3(4),pp. 225–226. DOI:10.1038/ngeo835.
  • Jensen, J.L,. Siddoway, C. S., Reiners, P.W., Ault, A.K., Thomson, S.N.  and Steele-MacInnis, M., 2018, Single-crystal hematite (U-Th)/He dates and fluid inclusions document widespread Cryogenian sand injection in crystalline basement, Earth and Planetary Science Letters, v. 500, 145–155, DOI:10.1016/j.epsl.2018.08.021
  • 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, DOI:10.1038/s41467-018-04583-0, https://rdcu.be/ZLBl  .

References

  1. ↑ Siddoway, Christine. "Tectonics: Microplate motion". Nature Geoscience. 3 (4): 225–226. Bibcode:2010NatGe...3..225S. doi:10.1038/ngeo835.
  2. ↑ Bell, Robin (2016-02-24). "Changes on the ice". Nature. 530 (7591): 507–507. doi:10.1038/nj7591-507a.
  3. ↑ "Christine Siddoway | Ph.D, Professor of Geology". sites.coloradocollege.edu. Retrieved 2016-07-29.
  4. ↑ "NSF Awards". nsf.gov. National Science Foundation. Archived from the original on 16 July 2017. Retrieved 2016-07-29.
  5. ↑ Luyendyk, Bruce P.; et al. (December 2001). "Structural and tectonic evolution of the Ross Sea rift in the Cape Colbeck region, Eastern Ross Sea, Antarctica". Tectonics. Hoboken, New Jersey: Wiley. 20 (6): 933–958. Bibcode:2001Tecto..20..933L. doi:10.1029/2000TC001260. ISSN 1944-9194. Retrieved 16 July 2017. Dissertation: Smith, C. H., Cordierite gneiss and high temperature metamorphism in the Fosdick Mountains, West Antarctica, with implications for breakup processes in the Pacific sector of the Mesozoic Gondwana margin, 1995 (see pg. 957)
  6. 1 2 "Antarctica Research". sites.coloradocollege.edu. Colorado College. Retrieved 2016-07-29.
  7. ↑ "Antarctic Mountain Named for UCSB Professor". www.independent.com. Santa Barbara Independent. Retrieved 2016-07-29.
  8. ↑ "Structural, petrological and geochronological data from Fosdick Mountains, Marie Byrd Land". gcmd.gsfc.nasa.gov. Global Change Master Directory. Retrieved 2016-07-29.
  9. ↑ "Collaborative research: Polyphase Orogenesis and Crustal Differentiation in West Antarctica". nsf.gov/. National Science Foundation. Retrieved 2016-08-12.
  10. ↑ "ANTscape". ANTscape. Retrieved 2016-07-29.
  11. ↑ "An Airborne Look Through the Ice". antarcticsun.usap.gov. The Antarctic Sun. 2015. Retrieved 2016-07-29.
  12. ↑ "NSF Award Search: Award#1443497 - Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)". www.nsf.gov. Retrieved 2016-07-29.
  13. 1 2 "A maverick sandstone that calls a granite home". arstechnica.com. Ars Technica. 2014. Retrieved 2016-08-01.
  14. ↑ Reilly, Michael (2014). "Strange rock formation was "fracked" by ancient quake". newscientist.com. New Scientist. Retrieved 2016-08-02.
  15. ↑ "Mysterious Colorado Rock Formation May Be Result of 'Natural Fracking'". livescience.com. Live Science. 2014. Retrieved 2016-08-02.
  16. ↑ "Strange formation on Colorado Rockies sheds light on Earth's past". sciencemag.org. AAAS Science. 2014-09-25. Retrieved 2016-07-29.
  17. ↑ "Lithosphere Editors". www.geosociety.org. Geological Society of America. Retrieved 2016-07-29.
  18. ↑ "Committee members". tamcamp.org. TAM Science. Retrieved 2016-07-29.
  19. ↑ "Two Colorado College Geology Professors Named Fellows of GSA". www.coloradocollege.edu. Colorado College. Retrieved 2016-07-29.
  20. ↑ "Antarctica Service Medal". www.usap.gov. United States Antarctic Program. Retrieved 2016-07-29.
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