Publications
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Glacial dust surpasses both volcanic ash and desert dust in its iron fertilization potential Glacial dust surpasses both volcanic ash and desert dust in its iron fertilization potential
The subarctic Pacific Ocean and Bering Sea comprise the second-largest high nitrate, low chlorophyll region in the world, where primary production is limited by the availability of iron (Fe). To estimate the potential impact of different terrestrial aerosol Fe sources on marine ecosystems, we performed a suite of laboratory assessments following established protocols, including: (1)...
Authors
Bess G. Koffman, Meg F. Yoder, Taylor Methven, Lena Hanschka, Helen B. Sears, Patrick L. Saylor, Kristi L. Wallace
Synoptic analysis of a decade of daily measurements of SO2 emission in the troposphere from volcanoes of the global ground-based Network for Observation of Volcanic and Atmospheric Change Synoptic analysis of a decade of daily measurements of SO2 emission in the troposphere from volcanoes of the global ground-based Network for Observation of Volcanic and Atmospheric Change
Volcanic plumes are common and far-reaching manifestations of volcanic activity during and between eruptions. Observations of the rate of emission and composition of volcanic plumes are essential to recognize and, in some cases, predict the state of volcanic activity. Measurements of the size and location of the plumes are important to assess the impact of the emission from sporadic or...
Authors
Santiago Arellano, Bo Galle, Fredy Apaza, Geoffroy Avard, Charlotte Barrington, Nicole Bobrowski, Claudia Bucarey, Viviana Burbano, Mike Burton, Zoraida Chacon, Gustavo Chigna, Christian Joseph Clarito, Vladimir Conde, Fidel Costa, Maarten de Moor, Hugo Delgado-Granados, Andrea Di Muro, D. Fernandez, Gustavo Garzon, Hendra Gunawan, Nia Haerani, Thor Hansteen, Silvana Hidalgo, Salvatore Inguaggiato, Mattias Johansson, Christoph Kern, Manne Kihlman, Philippe Kowalski, Pablo Masias, Francisco Montalvo, Joakim Moller, Ulrich Platt, Claudia Rivera, Armando Saballos, Giuseppe Salerno, Benoit Taisne, Freddy Vasconez, Gabriela Velazquez, Fabio Vita, Mathieu M. Yalire
A multidisciplinary investigation into the eruptive style, processes, and duration of a Cascades back-arc tholeiitic basalt: A case study of the Brushy Butte flow field, northern California, United States A multidisciplinary investigation into the eruptive style, processes, and duration of a Cascades back-arc tholeiitic basalt: A case study of the Brushy Butte flow field, northern California, United States
The Cascades back-arc in northern California is dominated by monogenetic tholeiitic basalts that erupted throughout the Pleistocene. Elucidating their eruptive history and processes is important for understanding potential future eruptions here. We focus on the well-exposed monogenetic volcano that emplaced the Brushy Butte flow field, which constructed a ∼150 m tall edifice, has flow...
Authors
Drew T. Downs, Duane E. Champion, Michael A. Clynne, L.J. Patrick Muffler
Lava effusion rate evolution and erupted volume during the 2018 Kīlauea lower East Rift Zone eruption Lava effusion rate evolution and erupted volume during the 2018 Kīlauea lower East Rift Zone eruption
The 2018 eruption on the lower East Rift Zone of Kīlauea Volcano produced one of the largest and most destructive lava flows in Hawai’i during the past 200 years. Over the course of more than 3 months, twenty-four fissures erupted, and the rate of lava effusion varied by two orders of magnitude, with significant implications for evolving flow behavior and hazards. Syn-eruptive data were...
Authors
Hannah R. Dietterich, Angela K. Diefenbach, S. Adam Soule, Michael H. Zoeller, Matthew R. Patrick, J. J. Major, Paul Lundgren
Development of a simulated lung fluid leaching method to assess the release of potentially toxic elements from volcanic ash Development of a simulated lung fluid leaching method to assess the release of potentially toxic elements from volcanic ash
Freshly erupted volcanic ash contains a range of soluble elements, some of which can generate harmful effects in living cells and are considered potentially toxic elements (PTEs). This work investigates the leaching dynamics of ash-associated PTEs in order to optimize a method for volcanic ash respiratory hazard assessment. Using three pristine (unaffected by precipitation) ash samples...
Authors
Ines Tomasek, David Damby, Carol Stewart, Claire J. Horwell, Geoffrey S. Plumlee, Christopher J Ottley, Pierre Delmelle, Suzette Morman, Sofian El Yazid, Philippe Claeys, Matthieu Kervyn, Marc Elskens, Martine Leermakers
Yellowstone Volcano Observatory 2019 annual report Yellowstone Volcano Observatory 2019 annual report
The Yellowstone Volcano Observatory (YVO) monitors volcanic and hydrothermal activity associated with the Yellowstone magmatic system, conducts research into magmatic processes occurring beneath Yellowstone Caldera, and issues timely warnings and guidance related to potential future geologic hazards. This report summarizes the activities and findings of YVO during the year 2019, focusing...
Authors
Yellowstone Volcano Observatory
Submarine lava deltas of the 2018 eruption of Kilauea volcano Submarine lava deltas of the 2018 eruption of Kilauea volcano
Hawaiian and other ocean island lava flows that reach the coastline can deposit significant volumes of lava in submarine deltas. The catastrophic collapse of these deltas represents one of the most significant, but least predictable, volcanic hazards at ocean islands. The volume of lava deposited below sea level in delta-forming eruptions and the mechanisms of delta construction and...
Authors
S. Adam Soule, Michael H. Zoeller, Carolyn Parcheta
U–Pb zircon eruption age of the Old Crow tephra and review of extant age constraints U–Pb zircon eruption age of the Old Crow tephra and review of extant age constraints
Eruption of the Old Crow tephra deposited ~200 km3 of volcanic ash throughout Alaska and the northwestern Yukon (eastern Beringia), providing an isochronous marker across the region on a scale unique in the Pleistocene. The Old Crow tephra represents a critical temporal piercing point used extensively to link geographically disparate stratigraphic sections and the paleo-environmental...
Authors
Seth D. Burgess, Jorge A. Vazquez, Christopher F. Waythomas, Kristi L. Wallace
The contribution of water radiolysis to marine sedimentary life The contribution of water radiolysis to marine sedimentary life
Water radiolysis continuously produces H2 and oxidized chemicals in wet sediment and rock. Radiolytic H2 has been identified as the primary electron donor (food) for microorganisms in continental aquifers kilometers below Earth’s surface. Radiolytic products may also be significant for sustaining life in subseafloor sediment and subsurface environments of other planets. However, the...
Authors
Justine F. Sauvage, Ashton F. Flinders, Arthur J. Spivack, Robert Pockalny, Ann G. Dunlea, Chloe H. Anderson, David Smith, Richard W. Murray, Steven D’Hondt
Eruption of compositionally heterogeneous andesites from a complex storage region during the 2006 eruption of Augustine Volcano Eruption of compositionally heterogeneous andesites from a complex storage region during the 2006 eruption of Augustine Volcano
Despite the common occurrence of heterogeneous andesitic eruptions, few studies have investigated the compositional effects on microlite crystallization and vesiculation in co-erupted natural samples. In 2006, Augustine Volcano erupted compositionally heterogeneous andesites that range from 56.4 to 63.3 wt% SiO2 and include two endmember lithologic groups: low-silica andesite (LSA) and...
Authors
Mary Catherine Benage, Heather M. Wright, Michelle L. Coombs
No ring fracture in Mono Basin, California No ring fracture in Mono Basin, California
In Mono Basin, California, USA, a near-circular ring fracture 12 km in diameter was proposed by R.W. Kistler in 1966 to have originated as the protoclastic margin of the Cretaceous Aeolian Buttes pluton, to have been reactivated in the middle Pleistocene, and to have influenced the arcuate trend of the chain of 30 young (62−0.7 ka) rhyolite domes called the Mono Craters. In view of the...
Authors
Edward Hildreth, Judith Fierstein, Juliet Ryan-Davis
Redefining the age of the lower Colorado River, southwestern United States Redefining the age of the lower Colorado River, southwestern United States
Sanidine dating and magnetostratigraphy constrain the timing of integration of the lower Colorado River (southwestern United States and northern Mexico) with the evolving Gulf of California. The Colorado River arrived at Cottonwood Valley (Nevada and Arizona) after 5.24 Ma (during or after the Thvera subchron). The river reached the proto–Gulf of California once between 4.80 and 4.63 Ma...
Authors
Ryan S. Crow, J. Schwing, K. E. Karlstrom, M. Heizler, P. A. Pearthree, P. K. House, S. Dulin, S. U. Janecke, Mark E. Stelten, L. J. Crossey