publications

publications by categories in reversed chronological order. generated by jekyll-scholar.

2025

  1. Science
    Carbonated ultramafic igneous rocks in Jezero crater, Mars
    Kenneth H. Williford, Kenneth A. Farley, Briony H.N. Horgan, and 72 more authors
    Science, 2025
    DOI
  2. JGR Planets
    Stratigraphy of Carbonate-Bearing Rocks at the Margin of Jezero Crater, Mars: Evidence for Shoreline Processes?
    Alexander J. Jones, Sanjeev Gupta, Robert Barnes, and 27 more authors
    Journal of Geophysical Research – Planets, 2025
    in press
  3. Dep. Record
    Domed-rim microbial polygons and their preservation potential
    F.R. Blattman, T.I. Eglinton, N. Haghipour, and 9 more authors
    The Depositional Record, 2025
    in press
  4. Nature
    Redox-driven mineral and organic associations in Jezero Crater, Mars
    Joel A. Hurowitz, M.M. Tice, A.C. Allwood, and 86 more authors
    Nature, 2025
    DOI
  5. JGR Planets
    Collection and in situ analyses of regolith samples by the Mars 2020 rover: Implications for their formation and alteration history
    E.M. Hausrath, R. Sullivan, Y. Goreva, and 64 more authors
    Journal of Geophysical Research – Planets, 2025
    DOI

2024

  1. Astrobio
    A machine learning approach to biosignature exploration on Early Earth and Mars using sulfur isotope and trace element data in pyrite
    M.C. Figueroa, D.D. Gregory, K.H. Williford, and 2 more authors
    Astrobiology, 2024
    DOI
  2. Sci. Adv.
    Inorganic interpretation of luminescent materials encountered by the Perseverance rover on Mars
    Eva L. Scheller, Tanja Bosak, Francis M. McCubbin, and 31 more authors
    Science Advances, 2024
    DOI
  3. AGU Adv.
    Astrobiological potential of rocks acquired by the Perseverance rover at a sedimentary fan front in Jezero crater, Mars
    T. Bosak, D.L. Shuster, E.L. Scheller, and 64 more authors
    AGU Advances, 2024
    DOI
  4. ESS
    Oriented bedrock samples drilled by the Perseverance rover on Mars
    Benjamin P. Weiss, Elias N. Mansbach, Joseph L. Carsten, and 21 more authors
    Earth and Space Science, 2024
    DOI
  5. JGR Planets
    Evidence of sulfate-rich fluid alteration in Jezero crater floor, Mars
    Sandra Siljeström, Andrew D. Czaja, Andrea Corpolongo, and 54 more authors
    Journal of Geophysical Research: Planets, 2024
    DOI

2023

  1. JGR Planets
    Samples collected from the floor of Jezero Crater with the Mars 2020 Perseverance Rover
    J.I. Simon, K. Hickman-Lewis, B.A. Cohen, and 65 more authors
    Journal of Geophysical Research: Planets, 2023
    DOI

2022

  1. Science
    Aqueous alteration processes in Jezero crater, Mars – implications for organic geochemistry
    Eva L. Scheller, Joseph Razzell Hollis, Emily L. Cardarelli, and 63 more authors
    Science, 2022
    DOI
  2. Geobiology
    A review of microbial-environmental interactions recorded in Proterozoic carbonate-hosted chert
    K.R. Moore, M. Daye, J. Gong, and 2 more authors
    Geobiology, 2022
    DOI
  3. Astrobio
    Deep-UV Raman spectroscopy of carbonaceous Precambrian microfossils: Insights into the search for past life on Mars
    J.T. Osterhout, J.W. Schopf, A.B. Kudryavstev, and 2 more authors
    Astrobiology, 2022
    DOI
  4. Science
    Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars
    K.A. Farley, K.M. Stack, D.L. Shuster, and 111 more authors
    Science, 2022
    DOI
  5. Science
    An olivine cumulate outcrop on the floor of Jezero crater, Mars
    Y. Liu, M.M. Tice, M.E. Schmidt, and 68 more authors
    Science, 2022
    DOI
  6. Sci. Adv.
    Compositionally and density stratified igneous terrain in Jezero crater, Mars
    Roger C. Wiens, Arya Udry, Olivier Beyssac, and 91 more authors
    Science Advances, 2022
    DOI
  7. Palaios
    Biosignature preservation aided by organic-cation interactions in Proterozoic tidal environments
    K.R. Moore, T.M. Present, F. Pavia, and 8 more authors
    Palaios, 2022
    DOI
  8. Nature
    In situ recording of Mars soundscape
    S. Maurice, B. Chide, N. Murdoch, and 40 more authors
    Nature, 2022
    DOI
  9. IJA
    Mars: new insights and unresolved questions
    H.G. Changela and others
    International Journal of Astrobiology, 2022
    DOI

2021

  1. Science
    Perseverance rover reveals an ancient delta-lake system and flood deposits at Jezero crater, Mars
    N. Mangold, S. Gupta, O. Gasnault, and 36 more authors
    Science, 2021
    DOI
  2. GSF
    A new semi-quantitative surface-enhanced raman spectroscopy method for detection of maleimide (2, 5-pyrroledione) with potential application to astrobiology
    J. Aramendia, L. Gomez-Nubla, M.L. Tuite, and 2 more authors
    Geoscience Frontiers, 2021
    DOI
  3. Geomicro. J.
    Carbon isotopes of Proterozoic filamentous microfossils: SIMS analyses of ancient cyanobacteria from two disparate shallow-marine cherts
    J.T. Osterhout, J.W. Schopf, K.H. Williford, and 3 more authors
    Geomicrobiology Journal, 2021
    DOI
  4. Geobiology
    A new model for silicification of cyanobacteria in Proterozoic tidal flats
    K.R. Moore, J. Gong, M. Pajusalu, and 9 more authors
    Geobiology, 2021
    DOI
  5. SSR
    Perseverance’s Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals (SHERLOC) investigation
    Rohit Bhartia, Luther W. Beegle, Lauren DeFlores, and 93 more authors
    Space Science Reviews, 2021
    DOI

2020

  1. SSR
    Mars 2020 Mission Overview
    Kenneth A. Farley, Kenneth H. Williford, Kathryn M. Stack, and 27 more authors
    Space Science Reviews, 2020
    DOI
  2. SSR
    Photogeologic map of the Perseverance rover field site in Jezero crater constructed by the Mars 2020 Science Team
    Kathryn M. Stack, Nathan R. Williams, Fred Calef III, and 64 more authors
    Space Science Reviews, 2020
    DOI
  3. DSR
    Discovery of novel structures at 10.7 km depth in the Mariana Trench may reveal chemolithoautotrophic microbial communities
    Kevin P. Hand, D. Bartlett, P. Fryer, and 4 more authors
    Deep Sea Research Part I, 2020
    DOI

2019

  1. Sci. Rep.
    Organo-mineral associations in chert of the 3.5 Ga Mount Ada Basalt raise questions about the origin of organic matter in Paleoarchean hydrothermally influenced sediments
    J. Alleon, D.T. Flannery, N. Ferralis, and 4 more authors
    Scientific Reports, 2019
    DOI
  2. PSS
    Field and laboratory validation of remote rover operations Science Team findings: The CanMars Sample Return analogue mission
    C.M. Caudill, G.R. Osinski, E. Pilles, and 11 more authors
    Planetary and Space Science, 2019
    DOI
  3. PPP
    From greenhouse to icehouse: Nitrogen biogeochemistry of an epeiric sea in the context of the oxygenation of the Late Devonian atmosphere/ocean system
    M.L. Tuite, K.H. Williford, and S.A. Macko
    Palaeogeography, Palaeoclimatology, Palaeoecology, 2019
    DOI
  4. Geobiology
    Microbially-influenced formation of Neoarchean ooids
    D. Flannery, A. Allwood, R. Hodyss, and 4 more authors
    Geobiology, 2019
    DOI
  5. Extremo.
    Microbial community composition and dolomite formation in the hypersaline microbial mats of the Khor Al-Adaid sabkhas, Qatar
    Z.A. DiLoreto, T.R.R. Bontognali, Z.A. Al Disi, and 9 more authors
    Extremophiles, 2019
    DOI
  6. PSS
    The CanMars Mars Sample Return Analogue Mission
    G.R. Osinski and others
    Planetary and Space Science, 2019
    DOI
  7. Icarus
    A look back: The drilling campaign of the Curiosity rover during the Mars Science Laboratory’s Prime Mission
    W. Abbey, R. Anderson, L. Beegle, and 18 more authors
    Icarus, 2019
    DOI
  8. PSS
    Exploring new models for improving planetary rover operations efficiency through the 2016 CanMars Mars Sample Return (MSR) analogue deployment
    E.A. Pilles, M. Cross, C.M. Caudill, and 11 more authors
    Planetary and Space Science, 2019
    DOI
  9. Geosci.
    The taphonomy of Proterozoic microbial mats and implications for early diagenetic silicification
    A.R. Manning-Berg, R.S. Wood, K.H. Williford, and 2 more authors
    Geosciences, 2019
    DOI
  10. GCA
    Extreme 13C-depletions and organic sulfur content argue for S-fueled anaerobic methane oxidation in 2.72 Ga old stromatolites
    K. Lepot, K.H. Williford, P. Philippot, and 5 more authors
    Geochimica et Cosmochimica Acta, 2019
    DOI

2018

  1. Book Ch.
    The NASA Mars 2020 rover mission and the search for extraterrestrial life
    K.H. Williford, K.A. Farley, K.M. Stack, and 13 more authors
    In From Habitability to Life on Mars, 2018
    DOI
  2. PSS
    The science process for selecting the landing site for the 2020 Mars rover
    J. Grant, M. Golombek, S. Wilson, and 3 more authors
    Planetary and Space Science, 2018
    DOI
  3. Quat. Res.
    A late Quaternary paleoenvironmental record in sand dunes of the northern Atacama Desert, Chile
    K.M. Finstad, M. Pfeiffer, G. McNicol, and 3 more authors
    Quaternary Research, 2018
    DOI
  4. Geostand.
    Simultaneous in situ analysis of carbon and nitrogen isotope ratios in organic matter by secondary ion mass spectrometry
    A. Ishida, K. Kitajima, K.H. Williford, and 3 more authors
    Geostandards and Geoanalytical Research, 2018
    DOI
  5. JGR Planets
    A field guide to finding fossils on Mars
    S. McMahon, T. Bosak, J. Grotzinger, and 7 more authors
    Journal of Geophysical Research: Planets, 2018
    DOI
  6. GCA
    Spatially-resolved isotopic study of carbon trapped in  3.43 Ga Strelley Pool Formation stromatolites
    D. Flannery, A.C. Allwood, R.E. Summons, and 4 more authors
    Geochimica et Cosmochimica Acta, 2018
    DOI

2017

  1. Precamb. Res.
    An aerobic  3400 Ma shallow-water microbial consortium: Presumptive evidence of Earth’s Paleoarchean anoxic atmosphere
    J.W. Schopf, A.B. Kudryavstev, J.T. Osterhout, and 4 more authors
    Precambrian Research, 2017
    DOI
  2. Icarus
    Deep UV Raman spectroscopy for planetary exploration: The search for in situ organics
    W.J. Abbey, R. Bhartia, L.W. Beegle, and 7 more authors
    Icarus, 2017
    DOI
  3. PNAS
    Biologic regulation of atmospheric chemistry en route to planetary oxygenation
    G. Izon, A.L. Zerkle, K.H. Williford, and 3 more authors
    Proceedings of the National Academy of Sciences, 2017
    DOI

2016

  1. Icarus
    Comparing orbiter and rover image-based mapping of an ancient sedimentary environment, Aeolis Palus, Gale Crater, Mars
    K.M. Stack, C.M. Edwards, J.P. Grotzinger, and 13 more authors
    Icarus, 2016
    DOI
  2. EPSL
    Testing the limits in a greenhouse ocean: Did low nitrogen availability limit marine productivity during the end-Triassic mass extinction?
    S.D. Schoepfer, T.J. Algeo, P.D. Ward, and 2 more authors
    Earth and Planetary Science Letters, 2016
    DOI
  3. Org. Geochem.
    Lipid biomarker stratigraphic records through the Late Devonian Frasnian/Famennian boundary: Comparison of high- and low-latitude epicontinental marine settings
    E.E. Haddad, M.L. Tuite, A.M. Martinez, and 4 more authors
    Organic Geochemistry, 2016
    DOI
  4. Mem. Mus. Vic.
    Organic geochemistry of a high-latitude Lower Cretaceous lacustrine sediment sample from the Koonwarra Fossil Beds, South Gippsland, Victoria, Australia
    M.L. Tuite, D.T. Flannery, and K.H. Williford
    Memoirs of Museum Victoria, 2016
  5. Precamb. Res.
    Microstructure-specific carbon isotopic signatures of organic matter from  3.5 Ga cherts of the Pilbara Craton support a biologic origin
    N. Morag, K.H. Williford, K. Kitajima, and 5 more authors
    Precambrian Research, 2016
    DOI
  6. Geobiology
    Carbon and sulfur isotopic signatures of ancient life and environment at the microbial scale: Neoarchean shales and carbonates
    K.H. Williford, T. Ushikubo, K. Lepot, and 7 more authors
    Geobiology, 2016
    DOI

2015

  1. PNAS
    Reply to Dvorak et al.: Apparent evolutionary stasis of ancient subseafloor sulfur cycling biocoenoses
    J.W. Schopf, A.B. Kudryavstev, M.R. Walter, and 7 more authors
    Proceedings of the National Academy of Sciences, 2015
    DOI
  2. Geology
    Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction
    A.H. Kasprak, J. Sepúlveda, R. Price-Waldman, and 6 more authors
    Geology, 2015
    DOI
  3. PNAS
    A fossil sulfur-cycling microbiota from the 1.8 Ga Duck Creek Formation provides promising evidence of evolution’s null hypothesis
    J.W. Schopf, A.B. Kudryavstev, M.R. Walter, and 7 more authors
    Proceedings of the National Academy of Sciences, 2015
    DOI
  4. Science
    The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars
    P.R. Mahaffy and others
    Science, 2015
    DOI

2014

  1. Chem. Geol.
    Development of in situ sulfur four-isotope analysis with multiple Faraday cup detectors by SIMS and application to pyrite grains in a Paleoproterozoic glaciogenic sandstone
    T. Ushikubo, K.H. Williford, J. Farquhar, and 3 more authors
    Chemical Geology, 2014
    DOI
  2. GCA
    An organic record of terrestrial ecosystem collapse and recovery at the Triassic–Jurassic boundary in East Greenland
    K.H. Williford, K. Grice, A. Holman, and 1 more author
    Geochimica et Cosmochimica Acta, 2014
    DOI

2013

  1. Science
    In situ radiometric and exposure age dating of the martian surface
    K.A. Farley and others
    Science, 2013
    DOI
  2. GCA
    Texture-specific isotopic compositions in 3.4 Gyr old organic matter support selective preservation in cell-like structures
    K. Lepot, K.H. Williford, T. Ushikubo, and 4 more authors
    Geochimica et Cosmochimica Acta, 2013
    DOI
  3. GCA
    Preservation and detection of microstructural and taxonomic correlations in the carbon isotopic compositions of individual Precambrian microfossils
    K.H. Williford, T. Ushikubo, J.W. Schopf, and 3 more authors
    Geochimica et Cosmochimica Acta, 2013
    DOI

2011

  1. GCA
    Constraining atmospheric oxygen and seawater sulfate concentrations during Paleoproterozoic glaciation: in situ sulfur three-isotope microanalysis of pyrite from the Turee Creek Group, Western Australia
    K.H. Williford, M.J. Van Kranendonk, T. Ushikubo, and 2 more authors
    Geochimica et Cosmochimica Acta, 2011
    DOI
  2. Appl. Geochem.
    The significance of 24-norcholestanes, 4-methylsteranes and dinosteranes in oils and source-rocks from East Sirte Basin (Libya)
    S. Aboglila, K. Grice, K. Trinajstic, and 2 more authors
    Applied Geochemistry, 2011
    DOI
  3. EPSL
    The molecular and isotopic effects of hydrothermal alteration of organic matter in the Paleoproterozoic McArthur River Pb/Zn/Ag ore deposit
    K.H. Williford, K. Grice, G.A. Logan, and 2 more authors
    Earth and Planetary Science Letters, 2011
    DOI

2010

  1. Org. Geochem.
    Use of biomarker distributions and compound specific isotopes of carbon and hydrogen to delineate hydrocarbon characteristics in the East Sirte Basin (Libya)
    S. Aboglila, K. Grice, D. Dawson, and 1 more author
    Organic Geochemistry, 2010
    DOI
  2. Stratig.
    Stratigraphy and sedimentology of the lower Black Bear Ridge section, British Columbia: candidate for the base-Norian GSSP
    J.P. Zonneveld, T.W. Beatty, K.H. Williford, and 2 more authors
    Stratigraphy, 2010

2009

  1. GCA
    New insights into the origin of perylene in geological samples
    K. Grice, H. Lu, P. Atahan, and 7 more authors
    Geochimica et Cosmochimica Acta, 2009
    DOI
  2. Geology
    Major perturbation in sulfur cycling at the Triassic/Jurassic boundary
    K.H. Williford, J. Foriel, P.D. Ward, and 1 more author
    Geology, 2009
    DOI

2008

  1. PPP
    Reply to comment on: "The organic carbon isotopic and paleontological record across the Triassic-Jurassic boundary at the candidate GSSP section at Ferguson Hill, Muller Canyon, Nevada, USA" by Ward et al. (2007)
    P. Ward, C. McRoberts, and K. Williford
    Palaeogeography, Palaeoclimatology, Palaeoecology, 2008
    DOI

2007

  1. PPP
    The organic carbon isotopic and paleontological record across the Triassic-Jurassic boundary at the candidate GSSP section at Ferguson Hill, Muller Canyon, Nevada, USA
    P.D. Ward, G.H. Garrison, K.H. Williford, and 4 more authors
    Palaeogeography, Palaeoclimatology, Palaeoecology, 2007
    DOI
  2. PPP
    An extended stable organic carbon isotope record across the Triassic-Jurassic boundary in the Queen Charlotte Islands, British Columbia, Canada
    K.H. Williford, P.D. Ward, G.H. Garrison, and 1 more author
    Palaeogeography, Palaeoclimatology, Palaeoecology, 2007
    DOI