Publications

William J. Abbey, Rohit Bhartia, Luther W. Beegle, Lauren DeFlores, Veronica Paez, Kripa Sijapati, Shakher Sijapati, Kenneth Williford, Michael Tuite, William Hug, Ray Reid, 2017. Deep UV Raman Spectroscopy for Planetary Exploration: The Search for In Situ Organics, Icarus. http://dx.doi.org/10.1016/j.icarus.2017.01.039

Izon, G., Zerkle, A., Williford, K.H., Farquar, J., Poulton, S.W., Claire, M.W. Biological Regulation of Atmospheric Chemistry En Route to Planetary Oxygenation, 2016. Proceedings of the National Academy of Sciences of the United States of America 114: E2571-2579. http://dx.doi.org/10.1073/pnas.1618798114

Haddad, E., Tuite, M., Martinez, A., Williford, K., Boyer, D., Droser, M., Love, G., 2016. Lipid biomarker stratigraphic records through the Late Devonian Frasnian/Famennian boundary: Comparison of high- and low-latitude epicontintental marine settings, Organic Geochemsitry.

Tuite, M.L, Flannery, D.T., Williford, K.W., 2016. Organic Geochemistry of a High-Latitude Lower Cretaceous Lacustrine Sediment Sample from the Koonwarra Fossil Beds, South Gippsland, Victoria, Australia. Memoirs of Museum Victoria.

Stack, K.M., Edwards, C.M., Grotzinger, J.P., Gupta, S., Sumner, D.Y., Calef, F.J. III, Edgar, L.A., Edgett, K.S., Fraeman, A.A., Jacob, S.R., Le Deit, L., Lewis, K.W., Rice, M.S., Rubin, D., Williams, R.M.E., Williford, K.H., 2016. Comparing orbiter and rover image-based mapping of an ancient sedimentary environment, Aeolis Palus, Gale Crater, Mars. Icarus (in press).

Morag, N., Williford, K.H., Kitajima, K., Philippot, P., Van Kranendonk, M.J., Lepot, K., Thomazo, C., Valley, J.W., 2016. Microstructure-specific carbon isotopic signatures of organic matter from ~3.5 Ga cherts of the Pilbara Craton support a biologic origin. Precambrian Research 275: 429-449. http://dx.doi.org/10.1016/j.precamres.2016.01.014

Williford, K.H., Ushikubo, T., Lepot, K., Kitajima, K., Hallmann, C., Spicuzza, M.J., Kozdon, R., Eigenbrode, J.L., Summons, R.E., Valley, J.W., 2016. Carbon and sulfur isotopic signatures of ancient life and environment at the microbial scale: Neoarchean shales and carbonates. Geobiology 14: 105-128. http://dx.doi.org/10.1111/gbi.12163

Kasprak, A.H., Sepúlveda, J., Price-Waldman, R., Williford, K.H., Schoepfer, S.D., Haggart. J.W., Ward, P.D., Summons, R.E., Whiteside, J.H., 2015. Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction. Geology 43: 307-310. http://dx.doi.org/10.1130/G36371.1

Schopf, J.W., Kudryavstev, A.B., Walter, M.R., Van Kranendonk, M.J., Williford, K.H., Kozdon, R., Valley, J.W., Gallardo, V.A., Espinoza, C., Flannery, D.T., 2015. A fossil sulfur-cycling microbiota from the 1.8 Ga Duck Creek Formation provides promising evidence of evolution's null hypothesis. Proceedings of the National Academy of Sciences of the United States of America 112: 2087-2092. http://dx.doi.org/10.1073/pnas.1419241112

Mahaffy, P.R. (and 26 others), 2015. The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars. Science 347: 412-414. http://dx.doi.org/ 10.1126/science.1260291

Farley, K.A. (and 33 others), 2013. In situ radiometric and exposure age dating of the martian surface. Science 343: published online 9 December 2013. http://dx.doi.org/10.1126/science.1247166