John R. Spear
Colorado School of Mines, Golden, CO
Activity
2023
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EXAMINING FE-CYCLING IN MICROBIAL MATS AS A LITHIFICATION MECHANISM
T223 New Advances in the Study of MicrobialitesWednesday, 18 October 20238:00 AM - 12:00 PM335
2022
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EXAMINING A NOVEL ROLE FOR IRON REDOX CYCLING AND THE LITHIFICATION OF MICROBIAL MATS IN THE ROCK RECORD
T87 New Voices in GeobiologyMonday, 10 October 20228:00 AM - 12:00 PM507
2021
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MICROBIAL ROLES IN THE RAPID FORMATION OF COLUMNAR TUFAS FROM BIG SODA LAKE, NEVADA
T138 Lacustrine Systems around the World I: In Honor of Michael RosenTuesday, 12 October 20218:00 AM - 12:00 PMPortland Ballroom 252 (Hybrid Room)
2020
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TEMPORAL AND SPATIAL VARIATION IN ACTIVELY SILICIFYING HYDROTHERMAL MICROBIAL COMMUNITIES AND RAMIFICATION IN THE ROCK RECORD
T214 New Voices in GeobiologyThursday, 29 October 20201:30 PM - 5:30 PMMeeting Rooms
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OXIDATION-REDUCTION COUPLES IN THE FORMATION OF STROMATOLITES: AN EXAMPLE OF IRON CYCLING IN OBSIDIAN POOL PRIME HOT SPRING, YELLOWSTONE NATIONAL PARK, WYOMING
T24 New Advances in GeobiologyMonday, 26 October 20201:30 PM - 5:30 PMMeeting Rooms
2018
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EVIDENCE FOR RAPID RATES OF OXYGENIC PHOTOSYNTHESIS WITHIN NEOARCHEAN STROMATOLITES
T150 New Voices in Geobiology ITuesday, 6 November 20188:00 AM - 12:00 PMRoom 243
2015
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CARBONATE-RICH CONES: A NEW MODERN ANALOGUE OF ANCIENT CONICAL STROMATOLITE FORMATION?
T109 Molecular Methodology and the Heart of Geobiology (Posters)Monday, 2 November 20159:00 AM - 6:30 PMExhibit Hall
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MICROBIAL DIVERSITY OF OOIDS FROM GREAT SALT LAKE, UT
T109 Molecular Methodology and the Heart of Geobiology (Posters)Monday, 2 November 20159:00 AM - 6:30 PMExhibit Hall
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COUPLED GEOCHEMICAL AND MICROBIOLOGICAL CHARACTERIZATION OF NON-CARBONATE FIRMGROUNDS FROM A MODERN SODA LAKE, WALKER LAKE, NEVADA
T109 Molecular Methodology and the Heart of Geobiology (Posters)Monday, 2 November 20159:00 AM - 6:30 PMExhibit Hall
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SPATIAL VARIATIONS IN MICROBIAL COMMUNITY COMPOSITION BETWEEN WATER AND SEDIMENT SAMPLES IN LITTLE HOT CREEK, CALIFORNIA: IMPLICATIONS FOR THE ROLE OF TEMPERATURE IN CONTROLLING HOT SPRING DIVERSITY
T109 Molecular Methodology and the Heart of Geobiology (Posters)Monday, 2 November 20159:00 AM - 6:30 PMExhibit Hall
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MICROBIAL BIOFABRICS IN CAVES: REFLECTIONS INFORM THE FUTURE
T15 New Perspectives in Karst Geomicrobiology and Redox Geochemistry: Advances from 20 Years of Interdisciplinary Research and Exploring Our Future FrontiersSunday, 1 November 20158:00 AM - 12:00 PMRoom 340
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MICROBIAL METABOLISMS INFLUENCE CARBONATE PRECIPITATION IN A LAMINATED MICROBIAL MAT
T55 Geomicrobiology: Microbes as a Geologic Force on Modern and Ancient EarthSunday, 1 November 20151:30 PM - 5:30 PMRoom 338
2014
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BIOGENICITY OF MIXED SILICA-CARBONATE ACCRETIONARY STRUCTURES FROM A HOT SPRING (LITTLE HOT CREEK, CA)
T313 New Developments in Microbialites (Posters)Wednesday, 22 October 20149:00 AM - 6:30 PMExhibition Hall C
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USING CARBON ISOTOPES TO ASSESS BIOGENICITY OF MIXED-COMPOSITION ACCRETIONARY STRUCTURES FROM A THERMAL SPRING (LITTLE HOT CREEK, CALIFORNIA, USA)
T313 New Developments in Microbialites (Posters)Wednesday, 22 October 20149:00 AM - 6:30 PMExhibition Hall C
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METAGENOMIC INSIGHTS INTO CONE FORMATION IN HOT SPRING MICROBIAL MATS
T191 Harnessing “Omics” to Advance the Geosciences: New Paradigms and Platforms for Observing Earth SystemsTuesday, 21 October 20148:00 AM - 12:00 PM304/305
2013
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OOID FORMATION IN THE GREAT SALT LAKE, UTAH: INSIGHTS FROM CLUMPED ISOTOPE PALEOTHERMOMETRY AND MOLECULAR BIOLOGY
T292 Continental CarbonatesTuesday, 29 October 20131:00 PM - 5:00 PMRoom 301
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MICROBIAL DIVERSITY AND CONSTRUCTION OF A YELLOWSTONE NATIONAL PARK STROMATOLITE
T179 Celebrating the Scientific Contributions of Kirk Nordstrom—Part 2: Geochemistry of Arsenic and Antimony, Microbial Biogeochemistry, Geothermal Systems, Radioactive Waste Disposal, and Geochemical ModelingMonday, 28 October 20131:00 PM - 5:00 PMRoom 503
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THE EVOLUTION OF GEOBIOLOGY IN THE CONTEXT OF LIVING STROMATOLITES
65 Special Session: GSA 125th Anniversary Books: I, The Web of Geological Sciences: Advances, Impacts, and Interactions; II, The Impact of Geological Sciences on Society: Authors Present Summaries of Their Articles IISunday, 27 October 20131:00 PM - 5:00 PMRoom 607
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MICROBIAL DIVERSITY IN HYPERSALINE SEDIMENTS OF THE GREAT SALT LAKE DESERT
T43 Curiosity at Gale—Past and Present Environments of Mars (Posters)Sunday, 27 October 20139:00 AM - 6:30 PMHall D
2011
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THE EFFECTS OF SPRING LEVEL ON STROMATOLITE LAMINATION AND MORPHOLOGY, YELLOWSTONE NATIONAL PARK
T155 Springs as Sites of Dynamic Physical, Geochemical, and Ecological ProcessesTuesday, 11 October 20118:00 AM - 12:00 PMRoom M100DE
2008
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A Tale of Two Stromatolites
T271 Microbialites: A 3.5-Billion-Year Record of Microbe-Sediment InteractionsTuesday, 7 October 20081:30 PM - 5:30 PM
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From Biofilms to Siliceous Stromatolites: The Interplay Between Microbial Activity, Hot Spring Chemistry and Growth Rate
T215 Biofilms and Biomineralization: Evidence from Ancient and Modern SystemsMonday, 6 October 20081:30 PM - 5:30 PM