Rebecca M. (Eby) Williams Institute (p) 608-729-7786 (e) [email protected]

Education: PhD., 2000, Planetary Sciences, Washington University, St. Louis, MO B.A., 1995, Cum Laude, and , Franklin & Marshall College, Lancaster, PA

Relevant Work History: Planetary Science Institute, Tucson, AZ 2011-Present Senior Scientist 2005-2010 Research Scientist Smithsonian Institution, Center for Earth and Planetary Science, Washington, DC 2004-2006 Research Associate, Lindbergh Fellow Malin Space Science Systems, Inc., San Diego, CA 2002-2004 Staff Scientist 2001-2002 Post-Doctoral Research Associate

Awards & Service: 2006 NASA Carl Fellowship for Early Career Researchers 2011 MRO CTX Science Team NASA Group Achievement Award 2013 MSL Science Office Development and Operations Team, NASA Group Achievement Award 2013-Present ESA ExoMars Landing Site Selection Working Group (LSSWG) Member 2015 NASA Next Orbiter to Science Advisory Group (NEX-SAG) Member 2015 MSL Prime Mission Science and Operations Team, NASA Group Achievement Award 2017 Friend of Education, Waunakee Teachers Association

Field Experience:  Deltas in Patagonia, Chile, PI, November 2018.  Inverted paleochannels & alluvial fans, Pampa del Tamarugal region, Atacama Desert, Chile, PI, Nov 2010, June 2012, May 2016, Nov. 2017.  Inverted paleochannels, Ebro Basin, Spain, Co-I, Feb. 2017 (PI Michael Lamb).  Rover operations testing, Co-I, near , UT, Oct. 2017; River, UT, April 2016 (GeoHeuristic Operational Strategies Testing, GHOST, PI Aileen Yingst).  Inverted paleochannels near Baker, CA, PI, Sep 2014, April 2016.  Inverted paleochannels near Cadney, Australia, PI, May 2011.  Meandering channels of the Quinn River, Nevada, Co-I, July 2010, Oct. 2011.  Inverted paleochannels, Cape York Peninsula, Queensland, Australia, PI, July 2009.  Lava-capped channel, Stanislaus Table Mountain, near Jamestown, CA, PI, Dec 2008.  Exhumed paleochannels, Emery, UT, PI, Oct. 2005; Sep. 2006; Oct. 2008.  Lava-capped channels, St. George, UT, PI, Sep. 2006; Oct. 2008.  Debris flows in the Central Front Range, CO, PI, Sep. 2005.  Gullies and alluvial fans in the Kau’u Desert, Volcano National Park, HI, Co-I, Aug 2005.  Alluvial fans in southwestern CA, PI, Jan. 2005.

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Peer-reviewed Publications

2019 Minitti, M. E., M.C. Malin, J.K. Van Beek, M. Caplinger, J.N. Maki, M. Ravine, F.J. Calef, III, L. A. Edgar, D. Harker, K. Herkenhoff, L.C. Kah, M.R. Kennedy, G. M. Krezoski, R.E. Kronyak, L. Lipkaman, B. Nixon, S.K. Rowland, J. Schieber, J. F. Schroeder, K.M. Stack, Williams, R. M. E., and R. A. Yingst, 2019 in press, Distribution of primary and secondary features in the Pahrump Hills outcrop ( crater, Mars) as seen in a Mars Descent Imager (MARDI) “sidewalk” mosaic, Icarus, doi:10.1016/j.icarus.2019.03.005. Stack, K. M., J. P. Grotzinger, J. P., Lamb, M. P., Gupta, S., Rubin, D., Kah, L. C., Edgar, L. A., Fey, D., Hurowitz, J. A., Sumner, D. Y., Van Beek, J. K., Williams, R. M. E., and Yingst, R. A., 2019 in press, Evidence for plunging river plume deposits in the Pahrump Hills member of the lower Murray formation, Gale crater, Mars, Sedimentology, doi:10.1111/sed.12558.

2018 Williams, R. M. E., Malin, M. C., Stack, K. M., and Rubin, D. M., 2018a, Assessment of Stratigraphic Relationships Based on Bench-forming Strata in the Kylie and the Kimberley Regions of Gale Crater, Mars: Icarus, v. 309, p. 84-104. doi:10.1016/j.icarus.2018.02.028. Williams, R. M. E., Moersch, J. E., and Fergason, R. L., 2018b, Thermophysical Properties of Fluvial Sinuous Ridges: Inferences on ‘Inverted Channel’ Induration Agent, Earth and Space Science, 5, doi:10.1029/2018EA000402. Chuang, F. C. and Williams, R. M. E., 2018, Morphology in the Greater Region, Mars, Journal of Maps. 14, 664-672. doi:10.1080/17445647.2018.1530154. https://www.tandfonline.com/doi/abs/10.1080/17445647.2018.1530154 Davis, J. M., Grindrod, P. M., Fawdon, P., Williams, R. M. E., Gupta, S., and Balme, M., 2018, Episodic and Declining Fluvial Processes in Southwest Melas , , Mars, Journal of Geophysical Research. 123, 2527–2549. doi:10.1029/2018JE005710. Yingst, R. A., Bartley, J., Cohen, B. A., Hynek, B. M., Kah, L. C., Gilleaudeau, G., Minitti, M. E., Williams, R. M. E., Chidsey, T. C., Black, S., Gemperline, J., Helsius, R., and Schaufler, R., 2018, Testing the efficiency of rover science protocols for robotic sample selection: A GeoHeuristic Operational Strategies Test, Acta Astronautica, 146, 300-315. doi.org/10.1016/j.actaastro.2018.02.029.

2017 Williams, R. M. E., F. C. Chuang, and D. C. Berman, 2017, Multiple Surface Wetting Events in the Greater Meridiani Planum Region, Mars: Evidence from Valley Networks within the Ancient Cratered Highlands, Geophysical Research Letters, 44 (4) p. 1669-1678. doi:10.1002/2016GL072259. Dietrich, W. E., Palucis, M. C., Williams, R. M. E., Lewis, K. W., Rivera-Hernandez, F., and Sumner, D. Y., 2017, Fluvial gravels on Mars: Analysis and implications, Gravel Bed Rivers: Processes and Disasters, edited by D. Tsutsumi and J. Laronne, Wiley. pg. 755- 776. doi:10.1002/9781118971437.

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Edgar, L. A., and others including R. M. E. Williams, 2017, Shaler: A Fluvial Sedimentary Deposit on Mars, Sedimentology. doi:10.1111/sed.12370. Vago, J. L., Westall, F., Pasteaur PI Team, ESA/ROS/IKI Contributors, Landing Site Working Group (including R. M. E. Williams), and Other Contributors, 2017, Searching for Traces of Life with the ExoMars Rover, . doi:10.1089/ast.2016.1533.

2016 Davis, J. M., Balme, M. R., Grindrod, P. M., Williams, R. M. E., and Gupta, S., 2016, Extensive fluvial systems in : implications for early martian climate: Geology, 44, 879-880. doi:10.1130/G38247.1. Laporte, M. G. A., Williams, R. M. E., and Lamb, M. P., 2016, Canyon formation constraints on the discharge of outburst floods on Earth and Mars. Journal of Geophysical Research. 121, 1232-1263, doi:10.1002/2016JE005061. Mangold, N and 32 others including R. Williams, Composition of conglomerates analyzed by the rover: Implications for Gale crater crust and sediment sources, 2016, Journal of Geophysical Research. v. 121, p. 353-387. doi: 10.1002/2015JE004977. Palucis, M., Dietrich, W. E., Williams, R. M. E., Hayes, A. G., Parker, T., Sumner, D. Y., Mangold, N., Lewis, K., and Newsom, H., 2016, Sequence and Relative Timing of Large in Gale Crater (Mars) after the Formation of Mt. Sharp, Journal of Geophysical Research, 121 25pp. doi:10.1002/2015JE004905. Stack, K. M., and others including Williams, R. M. E., 2016, Comparing orbiter and rover image-based mapping of an ancient sedimentary environment, Aeolis Palus, Gale crater, Mars, Icarus, 280, 3-21. doi:10.1016/j.icarus.2016.02.024. Yingst, R. A., K. S. Edgett, M. R. K., G. M. Krezoski, M. J. McBride, M. E. Minitti, M. A. Ravine, and R. M. E. Williams, 2016, MAHLI on Mars: Lessons learned operating a geoscience camera on a landed payload robotic arm Geoscientific Instrumentation, Methods, and Data Systems. 5, 205-217. doi:10.5194/gi-5-205-2016. Yingst, R. A., Cropper, K., Blank, J., Goetz, W., Hamilton, V. E., Hipkin, V., Kah, L. C., Madsen, M. B., McBride, M. J., Newsom, H., Williams, R. M. E., Bridges, N. T., Bridges, J. C., and Martinez Frias, J., 2016, Characteristics of pebble and cobble-sized clasts along the Curiosity rover traverse from 100 to 750. Icarus. 280, 72-92. doi:10.1016/j.icarus.2016.03.001.

2015 Grotzinger, J. P. and others including R. M. E. Williams, 2015, Deposition, Exhumation, and Paleoclimatology of an Ancient Deposit, Gale Crater, Mars. Science. v. 350, no. 6527. Doi:10.1126/science.aac7575. Mangold, N. and others including R. M. E. Williams, 2015, Chemical variations of Yellowknife Bay Formation sediments analyzed by the Curiosity rover on Mars, Journal of Geophysical Research, 230 (4), 452-482. doi:10.1002/2014je004681. Matsubara, Y., Howard, A. D., Burr, D. M., Williams, R. M. E., Dietrich, W. E., and Moore, J. M., 2015, River meandering on Earth and Mars: A comparative study of Aeolis Dorsa meanders, Mars and possible terrestrial analogs of the Usutuk River, AK and the Quinn River, NV, Geomorphology, v. 240, p. 102-120.

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2014 Williams, R. M. E. and C. M. Weitz, 2014, Reconstructing the Aqueous History within the southwestern Melas Basin: Clues from Stratigraphic and Morphometric Analyses of Fans. Icarus, 242, p. 19-37. doi:10.1016/j.icarus.2014.06.030. Grotzinger, J. P., and 69 others including R.M.E. Williams, 2014, A Habitable Fluvio- Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars. Science, 343, 1242777-1 to 1242777-14. doi:10.1126/science.1242777. Morgan, A. M., Howard, A. D., Hobley, D. E., Moore, J. M., Dietrich, W. E., Williams, R. M. E., Burr, D. M., Grant, J. A., Wilson, S. A., and Matsubara, Y., 2014, Sedimentology and Climatic Environment of Alluvial Fans in the Martian Crater and a Comparison with Terrestrial Fans. Icarus, 229, 131-156. doi:10.1016/j.icarus.2010.08.004. Vasavada, A. R. and 12 others including Williams, R.M.E., 2014, Overview of the Mission: to Yellowknife Bay and Beyond, Journal of Geophysical Research. 119, 1134-1161. doi: 10.1002/2014JE004622.

2011-2013 Williams, R. M. E., et al., 2013, Martian Fluvial Conglomerates at Gale Crater, Science, 340, 1068-1072. doi:10.1126/science.1237317. Williams, R. M. E., Irwin, R. P. III, Burr, D. M., Harrison, T. McClelland, P., 2013, Variability in Martian Sinuous Ridge Form: Case study in the Aeolis/Zephyria Planum Region and Lessons from the Mirackina Paleoriver, South Australia, Icarus, 225, 308-324. Yingst, R. A., and others including Williams, R.M.E., 2013, Characteristics of pebble and cobble-sized clasts along the Curiosity rover traverse from Bradbury Landing to . Journal of Geophysical Research, 118, 2361-2380. Craddock, R. A., Howard, A. D., Irwin, R. P. III, Tooth, S., Williams, R. M. E., Chu, P-S., 2012, Gully development in the Keanakāko'i Tephra, Kīlauea Volcano, Hawai'i: Implications for fluvial erosion and valley network formation on early Mars, Journal of Geophysical Research, 117(E8). Williams, R.M.E., Rogers, A. D., Chojnacki, M., Boyce, J., Seelos, K. D., Hardgrove, C., and Chuang, F. C., 2011, Evidence for episodic formation in far western Terra Tyrrhena, Mars. Icarus, 211 (1), 222-237. Williams, R. M. E., R. P. I. Irwin, J. R. Zimbelman, T. C. Chidsey, and D. E. Eby, 2011, Field guide to exhumed paleochannels near Green River, Utah: Terrestrial analogs for sinuous ridges on Mars. In: B. Garry and J. Bleacher (eds.) Analogs for Planetary Exploration, GSA Special Paper 483.

2000-2010 Burr, D. M., R. M. E. Williams, M. Chojnacki, K. D. Wendell, and J. P. Emery, 2010. Inverted fluvial features in the Aeolis/Zephyria Plana region, Mars: formation mechanism and initial paleodischarge estimates. Journal of Geophysical Research,115, E07011. Weitz, C. M., Milliken, R. E., Grant, J. A., McEwen, A. S., Williams, R. M. E., Bishop, J. L., and Thomson, B. J., 2010. Mars Reconnaissance Orbiter observations of light-toned layered deposits and associated fluvial landforms on the plains adjacent to Valles Mariners, Icarus. 205, 73-102. Williams, R.M.E., Irwin, R.P., III and Zimbelman, J.R., 2009, Evaluation of paleohydrologic models for terrestrial inverted channels: Implications for application to martian sinuous

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ridges. Geomorphology, 107: 300-315. Burr, D. M., Enga, M. T., Williams, R. M. E., Zimbelman, J. R., Howard, A. D., and Brennand, T. A., 2009. Pervasive Aqueous Paleoflow Features In the Aeolis/Zephyria Plana Region, Mars, Icarus. 200, 52-76. Williams, R.M.E. and Malin, M.C., 2008, Sub-kilometer fans in Crater, Mars. Icarus 198: 365-383. Williams, R.M.E., T.C. Chidsey, Jr., and D.E. Eby, 2007. Exhumed paleochanncels in central Utah - Analogs for raised curvilinear features on Mars. In: Willis, G.C.M.D. Hylland, D.L. , and T.C. Chidsey, Jr., (Eds.) Central Utah – diverse geology of a dynamic landscape, Utah Geological Association Publication 36. pp. 220-235. Williams, R.M.E., J.R. Zimbelman, A.K. Johnston, 2006, Aspects of alluvial fan shape indicative of formation process: A case study in southwestern California with application to Mojave Crater Fans on Mars, GRL, 33, L10201, doi:10.1029/2005GL025618. Williams, R.M.E., and M.C. Malin, 2004, Possible late stage mudflows in , Journal of Geophysical Research, 104, E06001, doi:10.1029/2003JE002178. Phillips, R.J., M.T. Zuber, S.C. Solomon, M.P. Golombek, B.M. Jakosky, R.M.E. Williams, B.M. Hynek, O. Aharonson, and S.A. Hauck, II, 2001, Ancient Geodynamics and Global- Scale Hydrology on Mars, Science, 291, 2587-2591. Williams, R.M., and R.J. Phillips, 2000, Morphometric measurements of martian valley networks from Mars Orbiter Laser Altimeter (MOLA) data, Journal of Geophysical Research, 106, E10, 23,737-23,751. Williams, R.M., R.J. Phillips and M.C. Malin, 1999, Flow Rates and Duration within Kasei Valles, Mars: Implications for the Formation of a Martian Ocean, GRL, 27, 1073-1076.

Other Publications

Williams, R. M. E., L. C. Kah, E. S. Boyd, D. E. Eby, M. Vanden Berg, T. C. Chidsey, D. R. Lageson, B. H. N. Horgan, J. F. Bell III, R. A. Yingst, D. L. Newell, D. W. Bowen, R. E. Kronyak, M. R. El-Maarry, 2018b, Lacustrine Microbialites: The Importance of Formative Conditions and Characteristics in Martian Sample Selection, White Paper for The National Academies of Sciences, Engineering and Medicine's Astrobiology Science Strategy for the Search for Life in the Universe. http://surveygizmoresponseuploads.s3.amazonaws.com/fileuploads/15647/3949545/48- 5f0a71069a7de6ab8b6028cf91a70d7d_Williams_LacustrineMicrobialite_AstrobiologyWhite_Paper.pdf LSSWG (Landing Site Selection Working Group), Vago, J. L., and D. Rodionov. 2018. ExoMars 5th Landing Site Selection Workshop: Final Report. ESA Document EXM- RM-REP-ESA-000XX. LSSWG, Vargo, J. L. and D. Rodionov, ExoMars 3rd Landing Site Selection Workshop Final Report, 21 January 2016, ESA Document number EXM-RM-REP-ESA-00005. http://exploration.esa.int/mars/57225-exomars-3rd-landing-site-selection-workshop-final- report/# Williams, R. M. E., 2013. Upside Down Rivers—Fluvial Pathways on Earth and Mars. F&M Scientist. 1, 145-166. Merritts, D. J., Eby, R., Harris, R., Edwards, R. L., and Chang, H., 1999, Variable rates of Late Quaternary surface uplift along the Banda-Arc-Australian plate collision zone, eastern Indonesia. In: I. S. Stewart, C. Vita-Finzi, (Eds.), Coastal Tectonics. London Geological Society, London, 1998, pp. 213-224. doi:10.1144/GSL.SP.1999.146.01.12.

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Principal Investigator for 12 NASA-Sponsored Research Grants

 Reconstructing the Aqueous History of Gale Crater from Mars Science Laboratory Observations, NASA Mars Science Laboratory Participating Scientist Program, 5/1/2016-9/30/2019  Evaluation of Formation Mechanisms for Stepped Fans, NASA Workings (SSW); 08/01/2015-07/31/2019  Constraining the Aqueous History of Meridiani Planum Investigation of Small-Scale Valley Networks and Deposits--A Window into Ancient Environment Transition on Mars; NASA Mars Data Analysis Program; 07/02/2014-07/01/2019  Investigations of Mars-analog Inverted Fluvial Landforms, NASA Mars Fundamental Research Program; 07/01/2013-06/30/2016  Investigation of the Aqueous History at the Mars Science Laboratory Landing Site, NASA Mars Science Laboratory Participating Scientist Program; 01/19/2012-01/31/2015 (Primary Mission); 02/01/2015 – 09/30/2015 (Extended Mission)  Fluvial Geomorphology Laboratory in Planetary Science, NASA Early Career Fellowship, 09/01/2011-08/31/2015  Interdisciplinary Investigation of Melas Basin for future Mars Landers, NASA JPL Site; 06/03/2010-12-31/2011  Morphological Investigations of Martian Fluvial Landforms with THEMIS, Mars Odyssey Participating Scientist & THEMIS Extended Mission; 4/1/2006-3/29/2009 4/1/2009-9/25/2016 (Extended Mission)  Fluvial Investigations Using Imagers Aboard the Mars Reconnaissance Orbiter, NASA Mars Reconnaissance Orbiter Participating Scientist; 03/21/2007-09/30/2009  Characterizing the Paleo-fluvial Environments of Fine-scale Martian Network Systems, NASA Mars Data Analysis Program; 04/02/2008-03/31/2011  Assessing the Preservation of Fluvial Pathways in the Terrestrial Geologic Record: Analogs for the Investigation of Martian Raised Channels, NASA Mars Fundamental Research Program, 07/1/2006-6/30/2009  Characterization and Evolution of Mid-Latitude Martian Landforms, NASA Mars Data Analysis Program, 07/2002-06/2005

Co-Investigator on seven NASA- Sponsored Research Grants

 Mapping Sinuous Ridges and Estimating Runoff Rates in Northwest Hellas, Mars, NASA Mars Data Analysis Program, PI Ryan Anderson (USGS-Flagstaff, AZ); 06/14/2016-06/13/2019  Defining Rover Science Protocols for Robotic Sample Return, NASA Planetary Science and Technology Through Analog Research (PSTAR), PI Aileen Yingst (Planetary Science Institute); 05/27/2015-05/26/2019  Quantifying the Discharge of Outburst Floods on Earth and Mars from Waterfall Mechanics NASA Planetary Geology and Geophysics Program, PI Michael Lamb (Caltech) 07/11/2013-07/10/2016

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 Geologic Mapping of a Proposed Mars Science Laboratory Landing Site in Southwestern , NASA Mars Data Analysis Program, PI Catherine Weitz (Planetary Science Institute); 04/01/2008-03/31/2011  Environmental Implications of Highly Sinuous Channels on Mars, NASA Mars Fundamental Research Program, PI Alan Howard (University of Virginia); 06/29/2009- 06/30/2012  Using Mantle Uplift Beneath Large Impact Craters on Mars to Constrain Thermal Evolution NASA Mars Data Analysis Program, 01/01/2008-12/31/2008  Raised Curvilinear Features (RCFs) in the western (MFF): mapping, characterization, and modeling, NASA Mars Data Analysis Program, PI Devon Burr (University of Tennessee--Knoxville); 11/01/2007 – 10/31/2012