Kenneth H WIlliford
Kenneth H WIlliford
Jet Propulsion Laboratory, California Institute of Technology
Verified email at jpl.nasa.gov - Homepage
TitleCited byYear
New insights into the origin of perylene in geological samples
K Grice, H Lu, P Atahan, M Asif, C Hallmann, P Greenwood, E Maslen, ...
Geochimica et Cosmochimica Acta 73 (21), 6531-6543, 2009
1692009
In situ radiometric and exposure age dating of the Martian surface
KA Farley, C Malespin, P Mahaffy, JP Grotzinger, PM Vasconcelos, ...
science 343 (6169), 1247166, 2014
1592014
Evidence for indigenous nitrogen in sedimentary and aeolian deposits from the Curiosity rover investigations at Gale crater, Mars
JC Stern, B Sutter, C Freissinet, R Navarro-González, CP McKay, ...
Proceedings of the National Academy of Sciences 112 (14), 4245-4250, 2015
1002015
An extended organic carbon-isotope record across the Triassic–Jurassic boundary in the Queen Charlotte Islands, British Columbia, Canada
KH Williford, PD Ward, GH Garrison, R Buick
Palaeogeography, Palaeoclimatology, Palaeoecology 244 (1-4), 290-296, 2007
1002007
Constraining atmospheric oxygen and seawater sulfate concentrations during Paleoproterozoic glaciation: In situ sulfur three-isotope microanalysis of pyrite from the Turee …
KH Williford, MJ Van Kranendonk, T Ushikubo, R Kozdon, JW Valley
Geochimica et Cosmochimica Acta 75 (19), 5686-5705, 2011
842011
The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars
PR Mahaffy, CR Webster, JC Stern, AE Brunner, SK Atreya, PG Conrad, ...
Science 347 (6220), 412-414, 2015
812015
Preservation and detection of microstructural and taxonomic correlations in the carbon isotopic compositions of individual Precambrian microfossils
KH Williford, T Ushikubo, JW Schopf, K Lepot, K Kitajima, JW Valley
Geochimica et Cosmochimica Acta 104, 165-182, 2013
612013
Texture-specific isotopic compositions in 3.4 Gyr old organic matter support selective preservation in cell-like structures
K Lepot, KH Williford, T Ushikubo, K Sugitani, K Mimura, MJ Spicuzza, ...
Geochimica et Cosmochimica Acta 112, 66-86, 2013
582013
Sulfur-cycling fossil bacteria from the 1.8-Ga Duck Creek Formation provide promising evidence of evolution's null hypothesis
JW Schopf, AB Kudryavtsev, MR Walter, MJ Van Kranendonk, KH Williford, ...
Proceedings of the National Academy of Sciences 112 (7), 2087-2092, 2015
452015
Carbon and sulfur isotopic signatures of ancient life and environment at the microbial scale: Neoarchean shales and carbonates
KH Williford, T Ushikubo, K Lepot, K Kitajima, C Hallmann, MJ Spicuzza, ...
Geobiology 14 (2), 105-128, 2016
402016
SHERLOC: scanning habitable environments with Raman & luminescence for organics & chemicals, an investigation for 2020
LW Beegle, R Bhartia, LP DeFlores, SA Asher, AS Burton, SM Clegg, ...
AGU Fall Meeting Abstracts, 2014
402014
Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction
AH Kasprak, J Sepúlveda, R Price-Waldman, KH Williford, SD Schoepfer, ...
Geology 43 (4), 307-310, 2015
392015
The molecular and isotopic effects of hydrothermal alteration of organic matter in the Paleoproterozoic McArthur River Pb/Zn/Ag ore deposit
KH Williford, K Grice, GA Logan, J Chen, D Huston
Earth and Planetary Science Letters 301 (1-2), 382-392, 2011
392011
Comparing orbiter and rover image-based mapping of an ancient sedimentary environment, Aeolis Palus, Gale crater, Mars
KM Stack, CS Edwards, JP Grotzinger, S Gupta, DY Sumner, FJ Calef III, ...
Icarus 280, 3-21, 2016
382016
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, KH Williford, J Farquhar, DT Johnston, MJ Van Kranendonk, ...
Chemical Geology 383, 86-99, 2014
382014
Major perturbation in sulfur cycling at the Triassic-Jurassic boundary
KH Williford, J Foriel, PD Ward, EJ Steig
Geology 37 (9), 835-838, 2009
322009
Biological regulation of atmospheric chemistry en route to planetary oxygenation
G Izon, AL Zerkle, KH Williford, J Farquhar, SW Poulton, MW Claire
Proceedings of the National Academy of Sciences 114 (13), E2571-E2579, 2017
302017
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, K Trinajstic, D Dawson, KH Williford
Organic Geochemistry 41 (12), 1249-1258, 2010
252010
Deep UV Raman spectroscopy for planetary exploration: The search for in situ organics
WJ Abbey, R Bhartia, LW Beegle, L DeFlores, V Paez, K Sijapati, ...
Icarus 290, 201-214, 2017
222017
An organic record of terrestrial ecosystem collapse and recovery at the Triassic–Jurassic boundary in East Greenland
KH Williford, K Grice, A Holman, JC McElwain
Geochimica et Cosmochimica Acta 127, 251-263, 2014
222014
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