 | Ushikubo, Takayuki, Williford, Kenneth H., Farquhar, James, Johnston, David T., Van Kranendonk, Martin J., Valley, John W. (2014) 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. Chemical Geology, 383. 86-99 doi:10.1016/j.chemgeo.2014.06.006 | Journal (article/letter/editorial) | | Paleoproterozoic glaciogenic sandstone Takayuki Ushikubo a,ā, Kenneth H. Williford a,b, James Farquhar c, David...53706, USA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA c Department...20742, USA d Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, USA e School...detrital pyrite grains in ~2.4 Ga glaciogenic sandstone from the Meteorite Bore Member of the Turee Creek...in VCDT. Pyrite grains in ~2.4 Ga glaciogenic sandstone have wide ranging sulfur isotope ratios (ā32.7 |  | Swanner, Elizabeth D., Bekker, Andrey, Pecoits, Ernesto, Konhauser, Kurt O., Cates, Nicole L., Mojzsis, Stephen J. (2013) Geochemistry of pyrite from diamictites of the Boolgeeda Iron Formation, Western Australia with implications for the GOE and Paleoproterozoic ice ages. Chemical Geology, 362. 131-142 doi:10.1016/j.chemgeo.2013.07.022 | Journal (article/letter/editorial) | | 399, 2200 Colorado Avenue, Boulder, CO 80309-0399, USA Department of Geological Sciences, University of...diamictites analyzed in this study and previous work (Williford et al., 2011) deļ¬nes multiple Ī“34S vs. Ī“33S arrays...399, 2200 Colorado Avenue, Boulder, CO 80309-0399, USA. Tel.: +1 303 492 5014; fax: +1 303 492 2606. E-mail...Yeera Bluff apparently did not show such a trend (Williford et al., 2011). Here, we re-examine the argument...Ridge location include a sandstone bed (190569 and 190583; Fig. 1b), a sandstone bed with scattered clasts |  | Williford, Kenneth H., Van Kranendonk, Martin J., Ushikubo, Takayuki, Kozdon, Reinhard, Valley, John W. (2011) 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. Geochimica et Cosmochimica Acta, 75 (19) 5686-5705 doi:10.1016/j.gca.2011.07.010 | Journal (article/letter/editorial) | | Turee Creek Group, Western Australia Kenneth H. Williford a,ā, Martin J. Van Kranendonk b,c, Takayuki Ushikubo...Wisconsin, 1215 W. Dayton St., Madison, WI 53706, USA b Geological Survey of Western Australia, 100 Plain...E-mail address: kwilliford@geology.wisc.edu (K.H. Williford). 0016-7037/$ - see front matter Ć 2011 Elsevier...oxidative weathering on the continents. 5688 K.H. Williford et al. / Geochimica et Cosmochimica Acta 75 (2011)...mudstone is overlain by three beds of coarse sandstone containing angular to subangular quartz clasts |  | Cui, Huan, Kitajima, Kouki, Spicuzza, Michael J., Fournelle, John H., Ishida, Akizumi, Brown, Philip E., Valley, John W. (2018) Searching for the Great Oxidation Event in North America: A Reappraisal of the Huronian Supergroup by SIMS Sulfur Four-Isotope Analysis. Astrobiology, 18 (5) 519-538 doi:10.1089/ast.2017.1722 | Journal (article/letter/editorial) | | Wisconsin, USA. Department of Geoscience, University of WisconsināMadison, Madison, Wisconsin, USA. Department...successions worldwide (e.g., Papineau et al., 2007; Williford et al., 2011; Hoffman, 2013; Rasmussen et al....sulfur reservoir (e.g., Ulrich et al., 2011; Williford et al., 2011; Cabral et al., 2013; Reinhard et...photochemical reaction in the atmospheric S cycle (Williford et al., 2011), or some other conditions that favor...Ulrich et al., 2011; Zhou et al., 2017), the sandstone-dominated Mississagi and Serpent formations and |  | Flannery, David T., Allwood, Abigail C., Summons, Roger E., Williford, Kenneth H., Abbey, William, Matys, Emily D., Ferralis, Nicola (2018) Spatially-resolved isotopic study of carbon trapped in ā¼3.43āÆGa Strelley Pool Formation stromatolites. Geochimica et Cosmochimica Acta, 223. 21-35 doi:10.1016/j.gca.2017.11.028 | Journal (article/letter/editorial) | | C. Allwood a, Roger E. Summons b, Kenneth H. Williford a, William Abbey a, Emily D. Matys b, Nicola Ferralis...California Institute of Technology, Pasadena, CA 91109, USA Department of Earth, Atmospheric and Planetary Sciences...Massachusetts Institute of Technology, MA 02139, USA c Department of Materials Science and Engineering...Massachusetts Institute of Technology, Cambridge, MA 02139, USA b Received 7 February 2017; accepted in revised...up to 1 km thick and consists predominantly of sandstone, conglomerate, quartzite, volcaniclastic rocks |  | Williford, Kenneth H., Grice, Kliti, Logan, Graham A., Chen, Junhong, Huston, David (2011) The molecular and isotopic effects of hydrothermal alteration of organic matter in the Paleoproterozoic McArthur River Pb/Zn/Ag ore deposit. Earth and Planetary Science Letters, 301 (1) 382-392 doi:10.1016/j.epsl.2010.11.029 | Journal (article/letter/editorial) | | McArthur River Pb/Zn/Ag ore deposit Kenneth H. Williford a,ā,1, Kliti Grice a,ā, Graham A. Logan b, Junhong...Five samples were collected from the McArthur River mine on a northeastāsouthwest transect in order to sample...E-mail addresses: kenwilliford@gmail.com (K.H. Williford), k.grice@curtin.edu.au (K. Grice). 1 Present...of Wisconsin, 1215 Dayton St. Madison, WI 53706, USA. 0012-821X/$ ā see front matter Ā© 2010 Elsevier B...relative to associated kerogen (Li et al., K.H. Williford et al. / Earth and Planetary Science Letters 301 |  | Williford, Kenneth H., Ushikubo, Takayuki, Schopf, J. William, Lepot, Kevin, Kitajima, Kouki, Valley, John W. (2013) Preservation and detection of microstructural and taxonomic correlations in the carbon isotopic compositions of individual Precambrian microfossils. Geochimica et Cosmochimica Acta, 104. 165-182 doi:10.1016/j.gca.2012.11.005 | Journal (article/letter/editorial) | | individual Precambrian microfossils Kenneth H. Williford a,ā, Takayuki Ushikubo a, J. William Schopf b...Wisconsin, 1215 W. Dayton St., Madison, WI 53706, USA b Department of Earth and Space Sciences, Center...University of California, Los Angeles, CA 90095, USA c NASA Astrobiology Institute, Penn State Astrobiology...Astrobiology Research Center, University Park, PA 16802, USA Received 21 February 2012; accepted in revised form...California Institute of Technology, Pasadena, CA 91109, USA. Tel.: +1 912 344 5677; fax: +1 608 262 0693. E-mail |  | | Journal (article/letter/editorial) | | TriassicāJurassic boundary in East Greenland Kenneth H. Williford a,ā, Kliti Grice a,ā, Alexander Holman a, Jennifer...91104, USA. Tel.: +1 6264293528. E-mail addresses: kenneth.h.williford@jpl.nasa.gov (K.H. Williford), k...concentrations (Belcher et al., 2010). K.H. Williford et al. / Geochimica et Cosmochimica Acta 127 (2014)...-140 -120 -100 -80 6 5B 5A 4 3 2 1.5 1 0 sandstone mudstone plant bed a cuticle* wood** n-C25 n-C27...Galli et al., 2005; Kuerschner et al., 2007; Williford et al., 2007; van de Schootbrugge et al., 2008; |  | Lepot, Kevin, Williford, Kenneth H., Ushikubo, Takayuki, Sugitani, Kenichiro, Mimura, Koichi, Spicuzza, Michael J., Valley, John W. (2013) Texture-specific isotopic compositions in 3.4Gyr old organic matter support selective preservation in cell-like structures. Geochimica et Cosmochimica Acta, 112. 66-86 doi:10.1016/j.gca.2013.03.004 | Journal (article/letter/editorial) | | cell-like structures Kevin Lepot a,b,ā, Kenneth H. Williford a,c, Takayuki Ushikubo a, Kenichiro Sugitani d...Wisconsin, 1215 W. Dayton St., Madison, WI 53706, USA b UniversiteĢ Lille 1, Laboratoire GeĢosysteĢmes...Laboratory, 4800 Oak Grove Dr., Pasadena, CA 91109, USA d Department of Environmental Engineering and Architecture...the majority of preserved microfossils in a SPF sandstone represent S-metabolizing microbes (Wacey et al...Kaufman and Xiao, 2003; Orphan and House, 2009; Williford et al., 2013), and (ii) can be correlated with |  | Schopf, J. William, Kudryavtsev, Anatoliy B., Osterhout, Jeffrey T., Williford, Kenneth H., Kitajima, Kouki, Valley, John W., Sugitani, Kenichiro (2017) An anaerobic ā¼3400 Ma shallow-water microbial consortium: Presumptive evidence of Earthās Paleoarchean anoxic atmosphere. Precambrian Research, 299. 309-318 doi:10.1016/j.precamres.2017.07.021 | Journal (article/letter/editorial) | | Kudryavtsev, Jeffrey T. Osterhout, Kenneth H. Williford, Kouki Kitajima, John W. Valley, Kenichiro Sugitani...Schopf, A.B. Kudryavtsev, J.T. Osterhout, K.H. Williford, K. Kitajima, J.W. Valley, K. Sugitani, An anaerobic...Los Angeles 2 Los Angeles, California 90095-1567 USA Phone: (310) 825-1170 E-mail: schopf@epss.ucla.edu..."coarse-grained, moderately sorted, quartz-rich sandstone" (Wacey et al., 2006), a notably atypical rocktype...Mississippian (~345 Ma) Keokuk Limestone of Kansas, USA (Franseen, 2006). In comparison with the grain size |  | | Journal (article/letter/editorial) | | A SIMULATED PAY SAND-W. R. Reynolds and C. W. Williford CLAY MINERALS OF CRETACEOUS SHALES OF THE CASSIPORE...REMOVAL FROM CATFISH POND WATER--M. Quiros, C. W. Williford, and W. R. Reynolds MINERAL-BASED FILLERS FOR...FORMATION OF THE INDIANA HALLOYSITE AT THE GARNER MINE, BEDFORD, I N D I A N A - - T h o m a s Dombrowski...KAOLINITIC MUDROCKS OF THE SAGINAW FORMATION AND EATON SANDSTONE (PENNSYLVANIAN G R A N D RIVER GROUP), G R A N...METAMORPHISM IN THE VALLEY A N D RIDGE PROVINCE, POLK COUNTY, GEORGIA--J. F. Renner and V. J. Hurst INFLUENCE |  | | Journal (article/letter/editorial) | | geology and sulfur-isotopic data (Martin, 1999; Williford et al., 2011; Swanner et al., 2013; Van Kranendonk...by a unit of greenish fine-grained quartz-rich sandstone that has been interpreted to reflect interbedded...Krapež et al. (2017) presented maximum ages from sandstone units of the TCG and the overlying Beasley River...obtained at the Boundary Ridge section (Figs. 1, 2; Williford et al., 2011; Swanner et al., 2013). Two well-preserved...400 mthick MBM situated 50 km to the southeast. Williford et al. (2011) combined this stratigraphic interpretation |  | | Journal (article/letter/editorial) | | Sciences, Harvard University, Cambridge, MA 02138, USA School of Earth and Ocean Sciences, University of...formation glacial diamictite Hough vvvvvv sandstone, conglomerate Elliott Serpent Quirke 2.35...proposed earlier by Moore et al. (2001, 2012) and Williford et al. (2011). 2.22 Ga South 2. North America...uraninite (UO2) in alluvial conglomerate and sandstone of the Matinenda Formation (Roscoe, 1969), and...to background ā¤0.2), occur in a thin (1.5 m) sandstoneāsiltstone unit lying conformably above diamictite |  | Luo, Genming, Richoz, Sylvain, van de Schootbrugge, Bas, Algeo, Thomas J., Xie, Shucheng, Ono, Shuhei, Summons, Roger E. (2018) Multiple sulfur-isotopic evidence for a shallowly stratified ocean following the Triassic-Jurassic boundary mass extinction. Geochimica et Cosmochimica Acta, 231. 73-87 doi:10.1016/j.gca.2018.04.015 | Journal (article/letter/editorial) | | 2001; PĆ”lfy et al., 2001; Hesselbo et al., 2002; Williford et al., 2007; Ruhl et al., 2011; Bachan et al...the carbon cycle during this critical interval (Williford et al., 2009; Jaraula et al., 2013), despite their...alternating flaser- and cross-bedded fine-grained sandstone and mudstone that can be correlated with the type...laminae of mudstone and sandstone, with a 6-m-thick bed of fine-grained sandstone in the middle of the unit...with overlying marine shales and intercalated sandstone beds of Hettangian age (Lias Ī±1 and base of Lias |  | | Journal (article/letter/editorial) | | Roerdink et al. (2016), Muller et al. (2016), Williford et al. (2016). Note that for Wacey et al. (2010)...2013; Gregory et al., 2015; Muller et al., 2016; Williford et al., 2016), and the results show larger (up...few previous studies (e.g., Guy et al., 2012; Williford et al., 2016). Hence, before coming to the conclusion...Formation is composed of fluvial conglomerate and sandstone, as well as lacustrine shale. The Tumbiana Formation... Mingah and Meentheena, which are made up of sandstone and volcaniclastics, and shale and stromatolitic |  | Cui, Huan, Kitajima, Kouki, Spicuzza, Michael J., Fournelle, John H., Denny, Adam, Ishida, Akizumi, Zhang, Feifei, Valley, John W. (2018) Questioning the biogenicity of Neoproterozoic superheavy pyrite by SIMS. American Mineralogist, 103 (9) 1362-1400 doi:10.2138/am-2018-6489 | Journal (article/letter/editorial) | | Datangpo Fm (Dawu mine), China Datangpo Fm (Xiangtan), China Datangpo Fm (Zhailanggou mine), China Datangpo...Datangpo Fm (Yanglizhang mine), China Datangpo Fm (Minle mine), China (n=66) 10 Datangpo Fm (Lijiawan)...(Lijiawan), China (n=6) 11 Datangpo Fm (Xixibao mine), China (n=10) 12 (n=4) 13 (n=15) 14 Datangpo Fm...(Gucheng), China Datangpo Fm (Datangpo mine), China Datangpo Fm (Daotuo mine), China (n=21) 15 (n=50) 16...Hunan Province (Liu et al. 2006), (5) Dawu mine, Songtao County, Guizhou Province (Zhou et al. 2007; Wu |  | Van Kranendonk, Martin J., Mazumder, Rajat, Yamaguchi, Kosei E., Yamada, Koji, Ikehara, Minoru (2015) Sedimentology of the Paleoproterozoic Kungarra Formation, Turee Creek Group, Western Australia: A conformable record of the transition from early to modern Earth. Precambrian Research, 256. 314-343 doi:10.1016/j.precamres.2014.09.015 | Journal (article/letter/editorial) | | consists of ~1600 m of predominantly fine-grained sandstone, siltstone, and mudstone, in 126 addition to...1981; 168 Martin, 1999; Van Kranendonk, 2010; Williford et al., 2011). The shallow-water (beach, 169...monotonous facies of interbedded fine-grained 184 sandstone-siltstone-mudstone. Facies association 2, best...3.1 Facies Association 1: mudstoneāsiltstoneāsandstoneāchertā ferruginous chert 197 Page 9 of 91 interbedded...1991). 231 3.1.3 Facies C: Fineāgrained massive sandstone facies an us cr ip t 222 M 232 Description: |  | | Journal (article/letter/editorial) | | 2006), or they form successions of homogeneous sandstone hundreds to thousands of metres thick, generally...(Thorne and Trendall, 2001; Van Kranendonk, 2010; Williford et al., 2011; Van Kranendonk and Mazumder, 2015)...ļ¬ne-grained quartz-rich sandstone (Fig. 4AāF) interbedded with ļ¬ne-grained sandstone and siltstone. Four...quartz-rich sandstone are clearly evident from ļ¬eld exposures (Fig. 2). Whereas the lower two sandstone units...beach deposit with aeolian reworking. The topmost sandstone unit is of ļ¬uvial origin (see Sections 3.1ā3.3 |  | | Journal (article/letter/editorial) | | Ī36S in Ruttan pyrite and Balmat pyrite (e.g., Williford et al., 2011; Whitehouse, 2013; Ireland et al... 2008; Ono et al., 2009; Wacey et al., 2010; Williford et al., 2011; Guy et al., 2012; Thomazo et al...Kaufman et al., 2007; Williford et al., 2011; Gregory et al., 2015; Williford et al., 2016), whereas...Laminated Quartz Veins, and Reefs at Bendigo Gold Mine, Australia: Insights for Ore Genesis. Economic Geology...Cosmochimica Acta 28, 641-671. Ushikubo T., Williford K. H., Farquhar J., Johnston D. T., Van Kranendonk |  | Morag, Navot, Williford, Kenneth H., Kitajima, Kouki, Philippot, Pascal, Van Kranendonk, Martin J., Lepot, Kevin, Thomazo, Christophe, Valley, John W. (2016) Microstructure-specific carbon isotopic signatures of organic matter from ā¼3.5 Ga cherts of the Pilbara Craton support a biologic origin. Precambrian Research, 275. 429-449 doi:10.1016/j.precamres.2016.01.014 | Journal (article/letter/editorial) | | biologic origin Navot Morag a,ā , Kenneth H. Williford a,b , Kouki Kitajima a , Pascal Philippot c ,...53706, USA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA c Institut...analysis (House et al., 2000; McKeegan et al., 1985; Williford et al., 2013). This study presents a new, comprehensive...of coarsely crystalline barite, conglomerate, sandstone and carbonates (Buick and Dunlop, 1990; Hickman...UāPb zircon dating of a felsic volcaniclastic sandstone from the top of the lowermost chert unit of the |  | | Journal (article/letter/editorial) | | of atmospheric oxygen (Van Kranendonk, 2010; Williford et al., 2011). The Turee Creek Group is unconformably...Corners Conglomerate Member of conglomerate and sandstone, mediumto ļ¬ne-grained quartz-rich sandstones,...ļ¬ne- to coarse-grained sandstone (Nummana Member). The quartz-rich sandstone member is characterized...Three Corners Conglomerate Member consists of sandstone and conglomerate, the latter with abundant, rounded...detailed section through the main quartz-rich sandstone of the BRQ was measured on the southern limb of |  | | Report (volume) | | GEOLOGICAL SURVEY OF MISSOURI. ARTHUR WINSLOW, STATE GEOLOGIST. VOL. II . A REPORT 0:N THE IRON...IRON ORES OF MISSOURI FROM FIELD WORK PROSECUTED DURING THE YEARS T891 and 1892. W i th 6 2 Illu s trat...Polk County. LETTER OF TRANSMITTAL. 0FFICI~ OF THE GEOLOGICAL SURVEY,} JEFFERSON CITY, MISSOURI, December...transmit, herewith, a Report upon the Iron Ores of Missouri, by Mr. Frank L. Nason, assistant geologist. Dnring... the two important iron mines of southeastern Missouri, the Iron IIIOuntain and Pilot Knob deposits, |  | | Journal (volume) | | Wright, Arlen Bloodworth, Jeanne Detenbeck, Susan Williford The meeting was held at Norwich University, commencing...at 8:50 PM. Respectfully submitted, Susan L. Williford Executive Committee Expense Reimbursement Guidelines... Committee Andy Raiford Chris Stone Susan 0. Williford Brad Jordan Tom Ray 1 90 Eric Lapp 1 90 Randy...wackes grade upwards into A) finer-grained meta-sandstone, meta-siltstone, laminated quartz-muscovite schist...President Chris Stone Vice President Susan 0. Williford Secretary Brad Jordan Treasurer Tom Ray 1 90 Board |  | Pilles, Eric A., Cross, M., Caudill, C.M., Francis, R., Osinski, G.R., Newman, J., Battler, M., Bourassa, M., Haltigin, T., Hipkin, V., Kerrigan, M., McLennan, S., Silber, E.A., Williford, K. (2019) Exploring new models for improving planetary rover operations efficiency through the 2016 CanMars Mars Sample Return (MSR) analogue deployment. Planetary and Space Science, 165. 250-259 doi:10.1016/j.pss.2018.10.001 | Journal (article/letter/editorial) | | Kerrigan a, S. McLennan f, E.A. Silber d, K. Williford c a Centre for Planetary Science and Exploration...Laboratory, California Institute of Technology, USA d Department of Earth, Environmental and Planetary...Sciences, Brown University, Providence, RI, 02912, USA e Canadian Space Agency, John H. Chapman Space Centre...University, 100 Nicolls Rd, Stony Brook, NY, 11794, USA g Dept Physics and Astronomy, University of Western...samples overall, with 20 in the primary mission (Williford et al., in press). In 2015, 2016, the Canadian |  | | Journal (article/letter/editorial) | | hydrothermal deposits (Simoneit et al. 2004, Williford et al. 2011). In the GSSP section, high abundances...identified in marine strata (Ward et al. 2001, 2004; Williford et al. 2007; PaĢlfy et al. 2001; Hesselbo et al...(McElwain et al. 1999, Whiteside et al. 2010, Williford et al. 2014), including strata with fossil wood...(Whiteside et al. 2010, Jaraula et al. 2013, Williford et al. 2014). Further indications of a perturbation...boundary section at AstarteklĆøft, East Greenland (Williford et al. 2014). High concentrations of PAHs in a |
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