Nelia Dunbar YOU? Author Swipe

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Long duration ∼600–500 Ma high-T metamorphism ended with early Ordovician rapid intermediate-T cooling and stabilization of Sri Lanka in central Gondwana Open

Daniel Holm, Inoka H. Widanagamage, Nelia Dunbar, Matthew T. Heizler · 2025

Continent formation and its stabilization are key factors for understanding tectonic processes and histories across geologic time. Sri Lanka consists of a Central Highland (HC) granulite/UHT terrane bounded by tectonic sutures and medium-t…

Lessons learned from shallow subglacial bedrock drilling campaigns in Antarctica Open

Scott Braddock, Ryan A. Venturelli, Keir A. Nichols, Elliot Moravec, Grant Boeckmann , et al. · 2024

We review successes and challenges from five recent subglacial bedrock drilling campaigns intended to find evidence for Antarctic Ice Sheet retreat during warm periods in the geologic past. Insights into times when the polar ice sheets wer…

Volcanic glass from the 1.8 ka Taupō eruption (New Zealand) detected in Antarctic ice at ~ 230 CE Open

Stephen B. Piva, Simon J. Barker, Nels Iverson, V. Holly L. Winton, Nancy A. N. Bertler , et al. · 2023

Chemical anomalies in polar ice core records are frequently linked to volcanism; however, without the presence of (crypto)tephra particles, links to specific eruptions remain speculative. Correlating tephras yields estimates of eruption ti…

Vulcanismo antartico: Esplora i vulcani più remoti del pianeta! Open

Adelina Geyer, Max Van Wyk de Vries, John L. Smellie, Jennifer Cooper, Alessio Di Roberto , et al. · 2023

Le eruzioni vulcaniche sono alcuni degli eventi naturali più spettacolari e distruttivi. L'Antartide ospita più di cento vulcani, alcuni dei quali sono interamente sepolti sotto la calotta glaciale. Alcuni di questi vulcani sono attivi e h…

Antarctic Volcanism: Explore the remotest volcanoes of the planet! Open

Adelina Geyer, Max Van Wyk de Vries, John L. Smellie, Jennifer Cooper, Alessio Di Roberto , et al. · 2023

Volcanic eruptions are some of the most spectacular and most destructive natural events. Antarctica is home to more than one hundred volcanoes, some of which are entirely buried beneath the ice sheet. Some of these volcanoes are active, an…

Vulcanismo antártico: ¡Explora los volcanes más remotos del planeta! Open

Adelina Geyer, Max Van Wyk de Vries, John L. Smellie, Jennifer Cooper, Alessio Di Roberto , et al. · 2023

Las erupciones volcánicas son uno de los fenómenos naturales más espectaculares y destructivos. La Antártida alberga más de cien volcanes, y muchos de ellos están completamente cubiertos por la capa de hielo. Algunos de estos volcanes está…

Vulcanismo antártico: ¡Explora los volcanes más remotos del planeta! Open

Adelina Geyer, Max Van Wyk de Vries, John L. Smellie, Jennifer Cooper, Alessio Di Roberto , et al. · 2023

Las erupciones volcánicas son uno de los fenómenos naturales más espectaculares y destructivos. La Antártida alberga más de cien volcanes, y muchos de ellos están completamente cubiertos por la capa de hielo. Algunos de estos volcanes está…

Vulcanismo antártico: ¡Explora los volcanes más remotos del planeta! Open

Adelina Geyer, Max Van Wyk de Vries, John L. Smellie, Jennifer Cooper, Alessio Di Roberto , et al. · 2023

Las erupciones volcánicas son uno de los fenómenos naturales más espectaculares y destructivos. La Antártida alberga más de cien volcanes, y muchos de ellos están completamente cubiertos por la capa de hielo. Algunos de estos volcanes está…

Fluvial response to Quaternary Hydroclimate in Eastern Africa: Evidence from Gona, Afar Open

Gary E. Stinchcomb, Jay Quade, Naomi E. Levin, Nels Iverson, Nelia Dunbar , et al. · 2022

The Busidima Formation in the Afar region, Ethiopia, spans the Quaternary and records the cultural evolution of the genus Homo . Yet, the Middle Pleistocene to Holocene fluvial environments in which early humans lived are undersampled in e…

Middle Miocene faulting and basin evolution during central Basin and Range extension: A detailed record from the upper Horse Spring Formation and red sandstone unit, Lake Mead region, Nevada, USA Open

Melissa A. Lamb, Thomas A. Hickson, Paul J. Umhoefer, Zachary W. Anderson, Crystal Pomerleau , et al. · 2022

Miocene basins of the Lake Mead region (southwestern United States) contain a well-exposed record of rifting and the evolving paleogeography of the eastern central Basin and Range. The middle Miocene Horse Spring Formation and red sandston…

Antarctic Volcanism: Explore the remotest volcanoes of the planet! Open

Adelina Geyer, Max Van Wyk de Vries, John L. Smellie, Jennifer Cooper, Alessio Di Roberto , et al. · 2022

Volcanic eruptions are some of the most spectacular and most destructive natural events. Antarctica is home to more than one hundred volcanoes, some of which are entirely buried beneath the ice sheet. Some of these volcanoes are active, an…

New Tricks for Old Tephra Open

Meredith Helmick, Andrei V. Kurbatov, Martin G. Yates, Nelia Dunbar, Nels Iverson , et al. · 2022

<p>Ice cores serve as archives of the Earth’s past atmosphere and are invaluable to improving our understanding of past climate. These cores preserve regional and global volcanic histories. Traditionally, the chemical compo…

Antarctic surface temperature and elevation during the Last Glacial Maximum Open

Christo Buizert, T. J. Fudge, William H. G. Roberts, Eric J. Steig, Sam Sherriff‐Tadano , et al. · 2021

Antarctic paleotemperatures It has been widely thought that East Antarctica was ∼9°C cooler during the Last Glacial Maximum, close to the ∼10°C difference between then and now determined independently for West Antarctica. Buizert et al. us…

Rhyolite volcanism in the Marie Byrd Land volcanic province, Antarctica: New evidence for pyroclastic eruptions during latest Pliocene icesheet expansion  Open

Nels Iverson, C. S. Siddoway, Matthew J. Zimmerer, John L. Smellie, Nelia Dunbar , et al. · 2021

<p>       IODP Expedition 379 deep-sea drilling in 2019 (Gohl et al. 2021, doi:10.14379/iodp.proc.379.2021), offered an opportunity to obtain chronostratigraphic control for seism…

S1: Active volcanoes in Marie Byrd Land Open

Nelia Dunbar, Nels Iverson, John L. Smellie, William C. McIntosh, Matthew J. Zimmerer , et al. · 2021

Detailed locations, descriptions and geochemistry of Mount Waesche englacial tephra layers, along with selected other samples, and description of Mount Waesche field campaigns.

Sophia in Aristophanes’ Birds Open

Nelia Dunbar · 2020

Christoph Kugelmeier, Reflexe früher und zeitgenössischer Lyrik in der Alten attischen Komödie (Beiträge zur Altertumskunde Bd. 80), Stuttgart-Leipzig: Teubner, 1996, 379 pp. Open

Nelia Dunbar · 2020

Piero Totaro, Le seconde parabasi di Aristofane (Beiträge zum Antiken Drama und seiner Rezeption Beiheft 9), Stuttgart-Weimar: Metzler, 1999. xxv + 219 pp. ISBN 3 476 45229 8. Open

Nelia Dunbar · 2020

Co-occurrence of Acheulian and Oldowan artifacts with <i>Homo erectus</i> cranial fossils from Gona, Afar, Ethiopia Open

Sileshi Semaw, Michael Rogers, Scott W. Simpson, Naomi E. Levin, Jay Quade , et al. · 2020

Homo erectus was anatomically variable and behaviorally flexible using both Oldowan and Acheulian artifacts.

S1: Active volcanoes in Marie Byrd Land Open

Nelia Dunbar, Nels Iverson, John L. Smellie, William C. McIntosh, Matthew J. Zimmerer , et al. · 2020

Detailed locations, descriptions and geochemistry of Mount Waesche englacial tephra layers, along with selected other samples, and description of Mount Waesche field campaigns.

Volcanic glass properties from 1459 C.E. volcanic event in South Pole ice core dismiss Kuwae caldera as a potential source Open

Laura Hartman, Andrei V. Kurbatov, Dominic Winski, Alicia Cruz‐Uribe, Siwan M. Davies , et al. · 2019

A large volcanic sulfate increase observed in ice core records around 1450 C.E. has been attributed in previous studies to a volcanic eruption from the submarine Kuwae caldera in Vanuatu. Both EPMA–WDS (electron microprobe analysis using a…

The SP19 chronology for the South Pole Ice Core – Part 1: volcanic matching and annual layer counting Open

Dominic Winski, T. J. Fudge, D. G. Ferris, E. C. Osterberg, John M. Fegyveresi , et al. · 2019

The South Pole Ice Core (SPICEcore) was drilled in 2014–2016 to provide a detailed multi-proxy archive of paleoclimate conditions in East Antarctica during the Holocene and late Pleistocene. Interpretation of these records requires an accu…

WAIS Divide Deep ice core 0-68 ka WD2014 chronology Open

Michael Sigl, Christo Buizert, T. J. Fudge, Mai Winstrup, Jihong Cole‐Dai , et al. · 2019

The West Antarctic Ice Sheet (WAIS) Divide deep ice core WD2014 chronology, consisting of ice age, gas age, delta-age and uncertainties therein. The West Antarctic Ice Sheet Divide (WAIS Divide, WD) ice core is a newly drilled, high-accumu…

Provenance and paleogeography of the 25–17 Ma Rainbow Gardens Formation: Evidence for tectonic activity at ca. 19 Ma and internal drainage rather than throughgoing paleorivers on the southwestern Colorado Plateau Open

Melissa A. Lamb, L. Sue Beard, Malia Dragos, Andrew D. Hanson, Thomas A. Hickson , et al. · 2018

The paleogeographic evolution of the Lake Mead region of southern Nevada and northwest Arizona is crucial to understanding the geologic history of the U.S. Southwest, including the evolution of the Colorado Plateau and formation of the Gra…

New Zealand supereruption provides time marker for the Last Glacial Maximum in Antarctica Open

Nelia Dunbar, Nels Iverson, Alexa R. Van Eaton, Michael Sigl, Brent V. Alloway , et al. · 2017

The first physical evidence of subglacial volcanism under the West Antarctic Ice Sheet Open

Nels Iverson, Ross Lieblappen, Nelia Dunbar, R. W. Obbard, Ellen Kim , et al. · 2017

The West Antarctic ice sheet (WAIS) is highly vulnerable to collapsing because of increased ocean and surface temperatures. New evidence from ice core tephra shows that subglacial volcanism can breach the surface of the ice sheet and may p…

Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion Open

Joseph R. McConnell, Andrea Burke, Nelia Dunbar, Peter Köhler, Jennie L. Thomas , et al. · 2017

Significance Cold and dry glacial-state climate conditions persisted in the Southern Hemisphere until approximately 17.7 ka, when paleoclimate records show a largely unexplained sharp, nearly synchronous acceleration in deglaciation. Detai…

Turmoil at Turrialba Volcano (Costa Rica): Degassing and eruptive processes inferred from high‐frequency gas monitoring Open

J. Maarten de Moor, Alessandro Aiuppa, Geoffroy Avard, Heidi Wehrmann, Nelia Dunbar , et al. · 2016

Eruptive activity at Turrialba Volcano (Costa Rica) has escalated significantly since 2014, causing airport and school closures in the capital city of San José. Whether or not new magma is involved in the current unrest seems probable but …

The WAIS Divide deep ice core WD2014 chronology – Part 2: Annual-layer counting (0–31 ka BP) Open

Michael Sigl, T. J. Fudge, Mai Winstrup, Jihong Cole‐Dai, D. G. Ferris , et al. · 2016

We present the WD2014 chronology for the upper part (0–2850 m; 31.2 ka BP) of the West Antarctic Ice Sheet (WAIS) Divide (WD) ice core. The chronology is based on counting of annual layers observed in the chemical, dust and electrical cond…

The WAIS Divide deep ice core WD2014 chronology – Part 2: Annual-layer counting (0–31 ka BP) Open

Michael Sigl, T. J. Fudge, Mai Winstrup, Jihong Cole‐Dai, D. G. Ferris , et al. · 2015

We present the WD2014 chronology for the upper part (0–2850 m, 31.2 ka BP) of the West Antarctic Ice Sheet (WAIS) Divide ice core. The chronology is based on counting of annual layers observed in the chemical, dust and electrical conductiv…

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