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Þorvaldur Þórðarson - Professor

Þorvaldur Þórðarson

–

School of Engineering and Natural Sciences

Þorvaldur Þórðarson

Professor

Professor in Volcanology and Petrology

Location
Askja / N-224
Phone
525 - 4428
Email
torvth [at] hi.is

Unit
Faculty of Earth Sciences
Published Work
Þorvaldur Þórðarson - published work

Curriculum Vitae
Þorvaldur Þórðarson - Curriculum Vitae
ORCID site
https://orcid.org/0000-0003-4011-7185
Research portal – Þorvaldur Þórðarson
Under construction throughout the autumn semester 2023

Professional Experience

2012 - , Professor, Faculty of Earth Sciences, University of Iceland
2015 - 2015, Visiting Professor, School of Physical Sciences, University of Tasmania
2006 - 2013, Reader, School of Earth Sciences, University of Edinburgh
2003 - 2006, Researcher, Institute of Earth Sciences, University of Iceland
2001 - 2006, Researcher, Department of Geology and Geophysics, University of Hawaii, Manoa
2004 - 2004, Visiting professor, Blaise Pascal University, Fance
1996 - 2003, Researcher, Exploration and Mining, CSIRO, Australia
1994 - 1996, Researcher, Wairakei Research Centre, IGNS, New Zealand
1990 - 1994, NASA Global Change Fellow, Department of Geology and Geophysics, University of Hawaii at Manoa
1988 - 1990, Research Fellow, NVI, Iceland
1986 - 1987, Field Instructor, NVI, Reykjavík
1974 - 1986, Independent Contractor in Construction, Multiple (e.g. the Terminal at Keflavík airport)
1979 - 1980, Teacher, Borganes elementary school
1978 - 1979, Teacher, Selfoss elementary school

Published works

2023

Seismic Tremor Reveals Changes in Episode Duration throughout the 2021 Geldingadalir Eruption, Iceland
Holocene deformation on a transform fault: Insights from paleoseismology on the Húsavík-Flatey Fault in North Iceland
Eruption Parameters Measured In-flight during the 2022 Icelandic Meradalir Eruption
Years of deep magmatic upheaval preceding the 2021 eruption at Fagradalsfjall, Iceland
A mineralogical approach to the 2021 Geldingadalir eruption of the Fagradalsfjall Fires,SW-Iceland – the study of water in clinopyroxene phenocrystals
Regional precipitation variability modulates Holocene fire history of Iceland

2022

Crowd-sourcing observations of volcanic eruptions during the 2021 Fagradalsfjall and Cumbre Vieja eventsNature Communications
Multiple Early Holocene eruptions of Katla produced tephra layers with similar composition to the Vedde Ash
Crater Rim Collapses Affect the Lava Fountaining Frequency during the Fagradalsfjall Eruption, Iceland 2021
Shallow conduit processes and sulfur release in the phreatomagmatic stages of the 1211 CE Younger Stampar eruption, Iceland
Characterising ice-magma interactions during a shallow subglacial fissure eruption: northern Laki, Iceland, a case study
Supplementary material to "Multiple Early Holocene eruptions of Katla produced tephra layers with similar composition to the Vedde Ash"
Diverse mantle components with invariant oxygen isotopes in the 2021 Fagradalsfjall eruption, IcelandNature Communications

2021

The explosive, basaltic Katla eruption in 1918, south Iceland II. Isopach map, ice cap deposition of tephra and layer volumeJOKULL

2020

The Saksunarvatn Ash and the G10ka series tephra. Review and current state of knowledgeQuaternary Geochronology
Temporal and spatial evolution of the Neogene age Breiðdalur central volcano through 39Ar/40Ar and U-Pb age determinationJournal of Volcanology and Geothermal Research
A catalogue of major and trace element data for Icelandic Holocene silicic tephra layersJournal of Quaternary Science
Mid-crustal storage and crystallization of Eyjafjallajökull ankaramites, South IcelandJOKULL
Lava Flow Roughness on the 2014–2015 Lava Flow-Field at Holuhraun, Iceland, Derived from Airborne LiDAR and PhotogrammetryGeosciences
Diffusion timescales of magmatic processes in the Moinui lava eruption at Mauna Loa, Hawaii, as inferred from bimodal olivine populationsJournal of Petrology
Lava–water interaction and hydrothermal activity within the 2014–2015 Holuhraun Lava Flow Field, IcelandJournal of Volcanology and Geothermal Research

2019

The 2014-2015 lava flow field at Holuhraun, Iceland: Using airborne hyperspectral remote sensing for discriminating the lava surfaceRemote Sensing
Thermal model of lava in Mt. Agung during December 2017 episodes derived from Integrated SENTINEL 2A and ASTER remote sensing datasetsIOP Conference Series: Earth and Environmental Science
Formation of segregation structures in Hafnarhraun pāhoehoe lobe, SW Iceland: a window into crystal–melt separation in basaltic magmaBulletin of Volcanology
Signature of deep mantle melting in South Iceland olivineContributions to Mineralogy and Petrology
The onset of neoglaciation in Iceland and the 4.2 ka eventClimate of the Past
Driving mechanisms of subaerial and subglacial explosive episodes during the 10th century Eldgjá fissure eruption, southern IcelandVolcanica

2018

Provenance, stratigraphy and chronology of Holocene tephra from Vestfirðir, IcelandQuaternary Geochronology
The onset of Neoglaciation in Iceland and the 4.2 ka event
Climatic control on Icelandic volcanic activity during the mid-HoloceneGeology
Assessing impact to infrastructures due to tephra fallout from Öræfajökull volcano (Iceland) by using a scenario-based approach and a numerical modelFrontiers in Earth Science
Magmatic crystal records in time, space, and process, causatively linked with volcanic unrestEarth and Planetary Science Letters
Petrology and geochemistry of the 2014–2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storageContributions to Mineralogy and Petrology
Total grain-size distribution of four subplinian–Plinian tephras from Hekla volcano, Iceland: Implications for sedimentation dynamics and eruption source parametersJournal of Volcanology and Geothermal Research
New insights for detecting and deriving thermal properties of lava flow using infrared satellite during 2014-2015 effusive eruption at Holuhraun, IcelandRemote Sensing
Paleomagnetism of Holocene lava flows from the Reykjanes Peninsula and the Tungnaá lava sequence (Iceland): implications for flow correlation and agesBulletin of Volcanology
The 1845 Hekla eruption: Grain-size characteristics of a tephra layerJournal of Volcanology and Geothermal Research
Interaction between central volcanoes and regional tectonics along divergent plate boundaries: Askja, IcelandBulletin of Volcanology
The Volume of Lava Erupted During the 2014 to 2015 Eruption at Holuhraun, Iceland: A Comparison Between Satellite- and Ground-Based MeasurementsJournal of Geophysical Research: Solid Earth

2017

Atmospheric processes affecting the separation of volcanic ash and SO<sub>2</sub> in volcanic eruptions: Inferences from the May 2011 Grímsvötn eruption
Translations of volcanological terms: cross-cultural standards for teaching, communication, and reportingBulletin of Volcanology
Lava field evolution and emplacement dynamics of the 2014–2015 basaltic fissure eruption at Holuhraun, IcelandJournal of Volcanology and Geothermal Research
Assessment of the potential respiratory hazard of volcanic ash from future Icelandic eruptions: A study of archived basaltic to rhyolitic ash samplesEnvironmental Health: A Global Access Science Source
Fragmentation mechanisms associated with explosive lava–water interactions in a lacustrine environmentBulletin of Volcanology
Strong constraints on aerosol-cloud interactions from volcanic eruptionsNature
Volatile and light lithophile elements in high-anorthite plagioclase-hosted melt inclusions from IcelandGeochimica et Cosmochimica Acta
REJUVENATION STAGE VOLCANIC SUCCESSION AT LAEO KILAUEA, KAUAI, HAWAII
Message in a stainless steel bottle thrown into deep geological timeGondwana Research
Multiple coincident eruptive seismic tremor sources during the 2014–2015 eruption at Holuhraun, IcelandJournal of Geophysical Research: Solid Earth
The opening subplinian phase of the Hekla 1991 eruption: properties of the tephra fall depositBulletin of Volcanology
Atmospheric processes affecting the separation of volcanic ash and SO2 in volcanic eruptions: Inferences from the May 2011 Grímsvötn eruptionAtmospheric Chemistry and Physics
Pāhoehoe, ‘a‘ā, and block lava: an illustrated history of the nomenclatureBulletin of Volcanology
Rootless tephra stratigraphy and emplacement processesBulletin of Volcanology
The rheological evolution of the 2014/2015 eruption at Holuhraun, central IcelandBulletin of Volcanology
Supplementary material to "Atmospheric processes affecting the separation of volcanic ash and SO<sub>2</sub> in volcanic eruptions: Inferences from the May 2011 Grímsvötn eruption"

2016

Shallow conduit processes during the ad 1158 explosive eruption of Hekla volcano, IcelandBulletin of Volcanology
Dispersal of key subplinian–Plinian tephras from Hekla volcano, Iceland: implications for eruption source parametersBulletin of Volcanology
Conclusion: Recommendations and findings of the RED SEED working groupGeological Society Special Publication
Postglacial eruptive history of the Askja region, North IcelandBulletin of Volcanology
Tracking timescales of short-term precursors to large basaltic fissure eruptions through Fe-Mg diffusion in olivineEarth and Planetary Science Letters
UNDERSTANDING FLOOD LAVAS: THE SAGA CONTINUES
Selective environmental stress from sulphur emitted by continental flood basalt eruptionsNature Geoscience
The architecture and shallow conduits of Laki-type pyroclastic cones: insights into a basaltic fissure eruptionBulletin of Volcanology
Degassing and magma mixing during the eruption of Surtsey Volcano (Iceland, 1963–1967): the signatures of a dynamic and discrete rift propagation eventBulletin of Volcanology
Subglacial lava propagation, ice melting and heat transfer during emplacement of an intermediate lava flow in the 2010 Eyjafjallajökull eruptionBulletin of Volcanology

2015

Supplementary material to "Big grains go far: reconciling tephrochronology with atmospheric measurements of volcanic ash"
Rootless cone eruption processes informed by dissected tephra deposits and conduitsBulletin of Volcanology
Disruption of tephra fall deposits caused by lava flows during basaltic eruptionsBulletin of Volcanology
Big grains go far: reconciling tephrochronology with atmospheric measurements of volcanic ash
The evolution and storage of primitive melts in the Eastern Volcanic Zone of Iceland: the 10 ka Grimsvotn tephra series (i.e. the Saksunarvatn ash)Contributions To Mineralogy and Petrology
Diffusive over-hydration of olivine-hosted melt inclusionsEarth and Planetary Science Letters
Big grains go far: understanding the discrepancy between tephrochronology and satellite infrared measurements of volcanic ashAtmospheric Measurement Techniques
MeMoVolc consensual document: a review of cross-disciplinary approaches to characterizing small explosive magmatic eruptionsBulletin of Volcanology
Satellite detection, long-range transport, and air quality impacts of volcanic sulfur dioxide from the 2014-2015 flood lava eruption at Bárðarbunga (Iceland)Journal of Geophysical Research
The RESET project: Constructing a European tephra lattice for refined synchronisation of environmental and archaeological events during the last c. 100 kaQuaternary Science Reviews

2014

Assessing hazards to aviation from sulfur dioxide emitted by explosive Icelandic eruptionsJournal of Geophysical Research-Atmospheres
Melt mixing causes negative correlation of trace element enrichment and CO2 content prior to an Icelandic eruptionEarth and Planetary Science Letters
Dike emplacement at Bardarbunga, Iceland, induces unusual stress changes, caldera deformation, and earthquakesBulletin of Volcanology
Holocene tephra from Iceland and Alaska in SE Greenland shelf sedimentsGeological Society Special Publication
The Cosmos greenstone succession, Agnew-Wiluna greenstone belt, Yilgarn Craton, Western Australia: Geochemistry of an enriched Neoarchaean volcanic arc successionLithos
Crystal Storage and Transfer in Basaltic Systems: the Skuggafjoll Eruption, IcelandJournal of Petrology
Reply to comment by Cole-Dai et al. on "Climatic impact of the long-lasting Laki eruption: Inapplicability of mass-independent sulfur isotope composition measurements"Journal of Geophysical Research-Atmospheres
Volcanic plume height correlated with magma-pressure change at Grímsvötn Volcano, IcelandNature Geoscience
Monitoring the Magmas Fuelling Volcanic Eruptions in Near-real-time Using X-ray Micro-computed TomographyJournal of Petrology
Pyroclastic edifices record vigorous lava fountains during the emplacement of a flood basalt flow field, Roza Member, Columbia River Basalt Province, USAGeological Society of America Bulletin
Reconstructing the deep CO2 degassing behaviour of large basaltic fissure eruptionsEarth and Planetary Science Letters
Volcanic plume height correlated with magma-pressure change at Grimsvotn Volcano, IcelandNature Geoscience

2013

Mush Disaggregation in Basaltic Magma Chambers: Evidence from AD 1783 Laki Eruption (vol 53, pg 2593, 2012)Journal of Petrology
Corrigendum to "Three-dimensional lithofacies variations in hyaloclastite deposits" [J. Volcanol. Geotherm. Res. 250 (2013) 19-33]Journal of Volcanology and Geothermal Research
Oxygen isotopes in melt inclusions and glasses from the Askja volcanic system, North IcelandGeochimica Et Cosmochimica Acta
U-Pb dating constraints on the felsic and intermediate volcanic sequence of the nickel-sulphide bearing Cosmos succession, Agnew-Wiluna greenstone belt, Yilgarn Craton, Western AustraliaPrecambrian Research
Crystal-Melt Relationships and the Record of Deep Mixing and Crystallization in the ad 1783 Laki Eruption, IcelandJournal of Petrology
Physicochemical and toxicological profiling of ash from the 2010 and 2011 eruptions of Eyjafjallajokull and Grimsvotn volcanoes, Iceland using a rapid respiratory hazard assessment protocolEnvironmental Research
Three-dimensional lithofacies variations in hyaloclastite deposits (vol 250, pg 19, 2013)Journal of Volcanology and Geothermal Research
Seismicity observed under the Snaefellsjokull volcanoJokull
The 1874-1876 volcano-tectonic episode at Askja, North Iceland: Lateral flow revisitedGeochemistry Geophysics Geosystems
Observing Iceland's Eyjafjallajokull 2010 eruptions with the autonomous NASA Volcano Sensor WebJournal of Geophysical Research-Solid Earth
UK monitoring and deposition of tephra from the May 2011 eruption of Grímsvötn, IcelandJournal of Applied Volcanology
Three-dimensional lithofacies variations in hyaloclastite depositsJournal of Volcanology and Geothermal Research

2012

Abrupt onset of the Little Ice Age triggered by volcanism and sustained by sea-ice/ocean feedbacksGeophysical Research Letters
Ash from the Eyjafjallajokull eruption (Iceland): Fragmentation processes and aerodynamic behaviorJournal of Geophysical Research-Solid Earth
Distal deposition of tephra from the Eyjafjallajokull 2010 summit eruptionJournal of Geophysical Research-Solid Earth
Formation of Oskjuvatn caldera at Askja, North Iceland: Mechanism of caldera collapse and implications for the lateral flow hypothesisJournal of Volcanology and Geothermal Research
Melt inclusion constraints on the magma source of Eyjafjallajokull 2010 flank eruptionJournal of Geophysical Research-Solid Earth
Mush Disaggregation in Basaltic Magma Chambers: Evidence from the ad 1783 Laki EruptionJournal of Petrology
Evaluation of the effects of composition on instrumental mass fractionation during SIMS oxygen isotope analyses of glassesChemical Geology
Interactions between lava and snow/ice during the 2010 Fimmvorouhals eruption, south-central IcelandJournal of Geophysical Research-Solid Earth
Petrogenesis of the Solheimar ignimbrite (Katla, Iceland): Implications for tephrostratigraphyGeochimica Et Cosmochimica Acta
Climatic impact of the long-lasting 1783 Laki eruption: Inapplicability of mass-independent sulfur isotopic composition measurementsJournal of Geophysical Research-Atmospheres
Ash generation and distribution from the April-May 2010 eruption of Eyjafjallajokull, IcelandScientific Reports
Dynamics, stratigraphy and proximal dispersal of supraglacial tephra during the ice-confined 2004 eruption at Grimsvotn Volcano, IcelandBulletin of Volcanology
Volcanism and the atmosphereEos
Volcanism and the atmosphereEos, Transactions American Geophysical Union

2011

Perception of volcanic eruptions in IcelandLandscapes and Societies: Selected Cases
Lava-ground ice interactions in Elysium Planitia, Mars: Geomorphological and geospatial analysis of the Tartarus Colles cone groupsJournal of Geophysical Research-Planets
New palaeointensity data from Holocene Icelandic lavasPhysics of the Earth and Planetary Interiors
Remobilization of silicic intrusion by mafic magmas during the 2010 Eyjafjallajokull eruptionSolid Earth
Integrating multiple space and ground sensors to track volcanic activity34th International Symposium on Remote Sensing of Environment - The GEOSS Era: Towards Operational Environmental Monitoring
A model for syn-eruptive groundwater flow during the phreatoplinian phase of the 28-29 March 1875 Askja volcano eruption, IcelandJournal of Volcanology and Geothermal Research
A 3000-year varved record of glacier activity and climate change from the proglacial lake Hvitarvatn, IcelandQuaternary Science Reviews
Excess mortality in Europe following a future Laki-style Icelandic eruptionProceedings of the National Academy of Sciences of the United States of America
Lava–ground ice interactions in Elysium Planitia, Mars: Geomorphological and geospatial analysis of the Tartarus Colles cone groupsJournal of Geophysical Research

2010

Perception of Volcanic Eruptions in IcelandLandscapes and Societies
Widespread dispersal of Icelandic tephra: how does the Eyjafjoll eruption of 2010 compare to past Icelandic events?Journal of Quaternary Science
Explosive lava-water interactions I: architecture and emplacement chronology of volcanic rootless cone groups in the 1783-1784 Laki lava flow, IcelandBulletin of Volcanology
Explosive lava-water interactions II: self-organization processes among volcanic rootless eruption sites in the 1783-1784 Laki lava flow, IcelandBulletin of Volcanology
Microanalysis of tephra by LA-ICP-MS - Strategies, advantages and limitations assessed using the Thorsmork ignimbrite (Southern Iceland)Chemical Geology
Tephra dispersal and eruption dynamics of wet and dry phases of the 1875 eruption of Askja Volcano, IcelandBulletin of Volcanology
The impact of the 1783-1784 AD Laki eruption on global aerosol formation processes and cloud condensation nucleiAtmospheric Chemistry and Physics
T. Thordarson, S. Self, G. Larsen, S.K. Rowland, Á. Hoskuldsson (eds): Studies in volcanology---the legacy of George Walker (Special Publications of IAVCEI No. 2)Bulletin of Volcanology

2009

Abrupt shifts between wet and dry phases of the 1875 eruption of Askja Volcano: Microscopic evidence for macroscopic dynamicsJournal of Volcanology and Geothermal Research
The endogenous growth of pahoehoe lava lobes and morphology of lava-rise edgesSpecial Publications of IAVCEI
Floods of water and lava in the Columbia River Basin: Analogs for MarsGSA Field Guides
Segregations in Surtsey lavas (Iceland) reveal extreme magma differentiation during late stage flow emplacementSpecial Publications of IAVCEI
Physical volcanology of continental large igneous provinces: Update and reviewSpecial Publications of IAVCEI
Effects of megascale eruptions on Earth and MarsSpecial Paper of the Geological Society of America
PrefaceVolcaniclastic Sedimentation in Lacustrine Settings
A 2000 year record of climate variations reconstructed from Haukadalsvatn, West IcelandJournal of Paleolimnology
Effusive activity in the 1963-1967 Surtsey eruption, Iceland: Flow emplacement and growth of small lava shieldsSpecial Publications of IAVCEI
Tephra Layers in a Sediment Core from Lake Hestvatn, Southern Iceland: Implications for Evaluating Sedimentation Processes and Environmental Impacts on a Lacustrine System Caused by Tephra Fall Deposits in the Surrounding WatershedVolcaniclastic Sedimentation in Lacustrine Settings
Determination of rapid Deccan eruptions across the Cretaceous-Tertiary boundary using paleomagnetic secular variation: 2. Constraints from analysis of eight new sections and synthesis for a 3500-m-thick composite sectionJournal of Geophysical Research-Solid Earth
Melt segregations in a Columbia River Basalt lava flow: A possible mechanism for the formation of highly evolved mafic magmasLithos

2008

The AD 1362 Oraefajokull eruption, SE Iceland: Physical volcanology and volatile releaseJournal of Volcanology and Geothermal Research
Katla volcano, Iceland: magma composition, dynamics and eruption frequency as recorded by Holocene tephra layersBulletin of Volcanology
Contrasting styles of welding observed in the proximal Askja 1875 eruption deposits I: Regional weldingJournal of Volcanology and Geothermal Research
Contrasting styles of welding observed in the proximal Askja 1875 eruption deposits II: Local weldingJournal of Volcanology and Geothermal Research
Postglacial volcanism in IcelandJokull

2007

Volcanism in Iceland in historical time: Volcano types, eruption styles and eruptive historyJournal of Geodynamics
Melt mixing and crystallisation in the plumbing system of the 1783 Laki eruptionGeochimica Et Cosmochimica Acta
Role of syn-eruptive cooling and degassing on textures of lavas from the AD 1783-1784 Laki eruption, south IcelandJournal of Petrology
Recent volatile evolution in the magmatic system of Hekla volcano, IcelandEarth and Planetary Science Letters
Survival of the Mýrdalsjökull ice cap through the Holocene thermal maximum: Evidence from sulphur contents in Katla tephra layers (Iceland) from the last ∼8400 yearsAnnals of Glaciology

2006

High-latitude eruptions cast shadow over the African monsoon and the flow of the NileGeophysical Research Letters
Volatile fluxes during flood basalt eruptions and potential effects on the global environment: A Deccan perspectiveEarth and Planetary Science Letters
Flood lavas on earth, Io and MarsJournal of the Geological Society
Modeling the distribution of the volcanic aerosol cloud from the 1783-1784 Laki eruptionJournal of Geophysical Research-Atmospheres
Contamination of water supplies by volcanic ashfall: A literature review and simple impact modellingJournal of Volcanology and Geothermal Research

2005

Gas fluxes from flood basalt eruptionsElements
Volcanic air pollution and mortality in France 1783-1784Comptes Rendus Geoscience
Petrogenesis of lavas from Detroit Seamount: Geochemical differences between Emperor Chain and Hawaiian volcanoesGeochemistry Geophysics Geosystems
Morphology, surface structures, and emplacement of lavas produced by Laki, A.D. 1783-1784Special Paper of the Geological Society of America

2004

Clustering within rootless cone groups on Iceland and Mars: Effect of nonrandom processesJournal of Geophysical Research-Planets
Magma volume, volatile emissions, and stratospheric aerosols from the 1815 eruption of TamboraGeophysical Research Letters
Accretionary-lapilli-bearing pyroclastic rocks at ODP Leg 192 Site 1184: A record of subaerial phreatomagmatic eruptions on the Ontong Java PlateauGeological Society Special Publication
Komatiites and nickel sulphide orebodies of the Black Swan area, Yilgarn Craton, Western Australia. 1. Petrology and volcanology of host rocksMineralium Deposita
Icelandic analogs to Martian flood lavasGeochemistry Geophysics Geosystems

2003

Sulphur release from flood lava eruptions in the Veidivötn, Grímsvötn and Katla volcanic systems, IcelandGeological Society Special Publication
Atmospheric and environmental effects of the 1783–1784 Laki eruption: A review and reassessmentJournal of Geophysical Research
The Emperor Seamounts: Southward motion of the Hawaiian hotspot plume in earth's mantleScience
Atmospheric and environmental effects of the 1783-1784 Laki eruption: A review and reassessmentJournal of Geophysical Research D: Atmospheres
Atmospheric and environmental effects of the 1783-1784 Laki eruption: A review and reassessmentJournal of Geophysical Research-Atmospheres

2002

Endogenous growth: It's role in the formation of internal pathways and the emplacement of mafic flow fieldsGeochimica Et Cosmochimica Acta
Emplacement of komatiite flow fields: An inflationary model based on field evidence and modern mafic analoguesGeochimica Et Cosmochimica Acta
Bimodal komatiite-dacite volcanism in the Black Swan area, Norseman-Wiluna Greenstone Belt, AustraliaGeochimica Et Cosmochimica Acta
Decoupled hybrid boundary layers at the base of komatiite lava pathways: Omnipresent components of actively eroding lava pathwaysGeochimica Et Cosmochimica Acta

2001

New estimates of sulfur degassing and atmospheric mass-loading by the 934 AD Eldgja eruption, IcelandJournal of Volcanology and Geothermal Research
Rootless cones on Mars indicating the presence of shallow equatorial ground ice in recent timesGeophysical Research Letters
Rootless cones on Mars indicating the presence of shallow equatorial ground ice in recent timesGeophysical Research Letters

2000

Discussion of: "Pulsed inflation of pahoehoe lava flows: implications for flood basalt emplacement", by S.W. Anderson, E.R. Stofan, E.R. Smrekar, J.E. Guest and B. Wood [Earth Planet. Sci. Lett. 168 (1999) 7-18]Earth and Planetary Science Letters
Magma origin and evolution of White Island (Whakaari) volcano, Bay of Plenty, New ZealandJournal of Petrology
Terrestrial analogs and thermal models for Martian flood lavasJournal of Geophysical Research-Planets

1999

Petrologic investigations of the 1995 and 1996 eruptions of Ruapehu volcano, New Zealand: formation of discrete and small magma pockets and their intermittent dischargeBulletin of Volcanology

1998

The Roza Member, Columbia River Basalt Group: A gigantic pahoehoe lava flow field formed by endogenous processes?Journal of Geophysical Research-Solid Earth
The importance of pahoehoeAnnual Review of Earth and Planetary Sciences
The Roza member, Columbia River Basalt Group: A gigantic pahoehoe lava flow field formed by endogenous processes?Journal of Geophysical Research: Solid Earth

1997

A radiocarbon age determination for Mount Edgecumbe (Putauaki) volcano, Bay of Plenty, New ZealandNew Zealand Journal of Geology and Geophysics
A radiocarbon age determination for Mount Edgecumbe (Putauaki) volcano, Bay of Plenty, New ZealandNew Zealand Journal of Geology and Geophysics
Emplacement of continental flood basalt lava flowsGeophysical Monograph Series

1996

Sulfur, chlorine, and fluorine degassing and atmospheric loading by the 1783-1784 AD Laki (Skaftar fires) eruption in IcelandBulletin of Volcanology
A new model for the emplacement of Columbia River Basalts as large, inflated pahoehoe lava flow fieldsGeophysical Research Letters
Sulfur, chlorine and fluorine degassing and atmospheric loading by the Roza eruption, Columbia River Basalt Group, Washington, USAJournal of Volcanology and Geothermal Research

1995

A MULTIFREQUENCY LABORATORY INVESTIGATION OF ATTENUATION AND SCATTERING FROM VOLCANIC ASH CLOUDSIeee Transactions on Geoscience and Remote Sensing

1994

ATMOSPHERIC AEROSOL LOADING AND TRANSPORT DUE TO THE 1783-84 LAKI ERUPTION IN ICELAND, INTERPRETED FROM ASH PARTICLES AND ACIDITY IN THE GISP2 ICE COREQuaternary Research

1993

THE LAKI (SKAFTAR-FIRES) AND GRIMSVOTN ERUPTIONS IN 1783-1785Bulletin of Volcanology

1992

The 1991 eruption of Hekla, IcelandBulletin of Volcanology
Correction to “Extreme magma homogeneity in the 1783-84 Lakagigar Eruption: ORigin of a large volume of evolved basalt in Iceland” by Olgeir Sigmarsson, Michel Condomines, Karl Gronvold, and Thorvaldur ThordarsonGeophysical Research Letters
THE 1991 ERUPTION OF HEKLA, ICELANDBulletin of Volcanology
Correction to “Extreme magma homogeneity in the 1783–84 Lakagigar Eruption: ORigin of a large volume of evolved basalt in Iceland” by Olgeir Sigmarsson, Michel Condomines, Karl Gronvold, and Thorvaldur ThordarsonGeophysical Research Letters

1991

EXTREME MAGMA HOMOGENEITY IN THE 1783-84 LAKAGIGAR ERUPTION - ORIGIN OF A LARGE VOLUME OF EVOLVED BASALT IN ICELANDGeophysical Research Letters

Keywords for Specialisation:

Paleoclimatology

Natural hazards

Geology of mineralized succession