All Outputs (18)

Cohesional behaviours in pyroclastic material and the implications for deposit architecture (2023)
Journal Article
Walding, N., Williams, R., Rowley, P., & Dowey, N. (2023). Cohesional behaviours in pyroclastic material and the implications for deposit architecture. Bulletin of volcanology, 85(11), Article 67. https://doi.org/10.1007/s00445-023-01682-9

Pyroclastic density currents (PDCs) are hazardous, multiphase currents of heterogeneous volcanic material and gas. Moisture (as liquid or gas) can enter a PDC through external (e.g., interaction with bodies of water) or internal (e.g., initial erupti... Read More about Cohesional behaviours in pyroclastic material and the implications for deposit architecture.

Anatomy of a volcanic eruption undersea (2023)
Journal Article
Williams, R., & Rowley, P. (2023). Anatomy of a volcanic eruption undersea. Science, 381(6662), 1046-1047. https://doi.org/10.1126/science.adk0181

In December 2021, an undersea volcano in the southern Pacific Ocean, the Hunga Tonga–Hunga Ha‘apai (hereafter called the Hunga volcano) began erupting. In January 2022 the eruption reached a powerful climax, triggering atmospheric waves that traveled... Read More about Anatomy of a volcanic eruption undersea.

Simultaneous fall and flow during pyroclastic eruptions: A novel proximal hybrid facies (2022)
Journal Article
Dowey, N., & Williams, R. (2022). Simultaneous fall and flow during pyroclastic eruptions: A novel proximal hybrid facies. Geology, 50(10), 1187-1191. https://doi.org/10.1130/G50169.1

The deposits of Plinian and subplinian eruptions provide critical insights into past volcanic events and inform numerical models that aim to mitigate against future hazards. However, pyroclastic deposits are often considered from either a fallout or... Read More about Simultaneous fall and flow during pyroclastic eruptions: A novel proximal hybrid facies.

Volcanologists—who are we and where are we going? (2022)
Journal Article
Kavanagh, J. L., Annen, C. J., Burchardt, S., Chalk, C., Gallant, E., Morin, J., …Williams, R. (2022). Volcanologists—who are we and where are we going?. Bulletin of volcanology, 84(5), Article 53. https://doi.org/10.1007/s00445-022-01547-7

Equity, diversity and inclusivity (EDI) are principles all scientific groups and organisations should strive to achieve as they secure working conditions, policies and practices that not only promote high-quality scientific output but also well-being... Read More about Volcanologists—who are we and where are we going?.

A UK perspective on tackling the geoscience racial diversity crisis in the Global North (2021)
Journal Article
Barclay, J., Dowey, N., Fernando, B., Giles, S., Houghton, J., Jackson, C., …Williams, R. (in press). A UK perspective on tackling the geoscience racial diversity crisis in the Global North. Nature Geoscience, https://doi.org/10.1038/s41561-021-00737-w

Knickpoints and crescentic bedform interactions in submarine channels (2021)
Journal Article
Chen, Y., Parsons, D. R., Simmons, S. M., Williams, R., Cartigny, M. J. B., Hughes Clarke, J. E., …Vendettuoli, D. (2021). Knickpoints and crescentic bedform interactions in submarine channels. Sedimentology, 68(4), 1358-1377. https://doi.org/10.1111/sed.12886

Submarine channels deliver globally important volumes of sediments, nutrients, contaminants and organic carbon into the deep sea. Knickpoints are significant topographic features found within numerous submarine channels, which most likely play an imp... Read More about Knickpoints and crescentic bedform interactions in submarine channels.

Volcanological evolution of Pantelleria Island (Strait of Sicily) peralkaline volcano: a review (2021)
Journal Article
Jordan, N. J., White, J. C., Williams, R., Speranza, F., Rotolo, S. G., & Scaillet, S. (in press). Volcanological evolution of Pantelleria Island (Strait of Sicily) peralkaline volcano: a review. Comptes Rendus Géoscience, 353(S2), 1-22. https://doi.org/10.5802/CRGEOS.51

Pantelleria volcano has a particularly intriguing evolutionary history intimately related to the peralkaline composition of its explosively erupted magmas. Due to the stratigraphic complexity, studies over the last two decades have explored either on... Read More about Volcanological evolution of Pantelleria Island (Strait of Sicily) peralkaline volcano: a review.

The role of lithospheric thickness in the formation of ocean islands and seamounts: contrasts between the Louisville and Emperor-Hawaiian hotspot trails (2020)
Journal Article
Fitton, J. G., Williams, R., Barry, T. L., & Saunders, A. D. (2020). The role of lithospheric thickness in the formation of ocean islands and seamounts: contrasts between the Louisville and Emperor-Hawaiian hotspot trails. Journal of Petrology, 61(11-12), Article egaa111. https://doi.org/10.1093/petrology/egaa111

The Hawaii-Emperor and Louisville seamounts form the two most prominent time-progressive hotspot trails on Earth. Both formed over a similar time interval on lithosphere with a similar range of ages and thickness. The Hawaii-Emperor seamounts are lar... Read More about The role of lithospheric thickness in the formation of ocean islands and seamounts: contrasts between the Louisville and Emperor-Hawaiian hotspot trails.

A bedform phase diagram for dense granular currents (2020)
Journal Article
Smith, G., Rowley, P., Williams, R., Giordano, G., Trolese, M., Silleni, A., …Capon, S. (2020). A bedform phase diagram for dense granular currents. Nature communications, 11(1), Article 2873. https://doi.org/10.1038/s41467-020-16657-z

Pyroclastic density currents (PDCs) are a life-threatening volcanic hazard. Our understanding and hazard assessments of these flows rely on interpretations of their deposits. The occurrence of stratified layers, cross-stratification, and bedforms in... Read More about A bedform phase diagram for dense granular currents.

Reconstructing the Anak Krakatau flank collapse that caused the December 2018 Indonesian tsunami (2019)
Journal Article
Williams, R., Rowley, P., & Garthwaite, M. C. (2019). Reconstructing the Anak Krakatau flank collapse that caused the December 2018 Indonesian tsunami. Geology, 47(10), 973-976. https://doi.org/10.1130/G46517.1

Volcanogenic tsunamis are one of the deadliest volcanic phenomena. Understanding their triggering processes, and mitigating their effect, remains a major challenge. On 22 December 2018, flank failure of the Anak Krakatau volcano in Indonesia generate... Read More about Reconstructing the Anak Krakatau flank collapse that caused the December 2018 Indonesian tsunami.

Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents (2018)
Journal Article
Smith, G. M., Williams, R., Rowley, P., & Parsons, D. R. (2018). Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents. Bulletin of volcanology, 80(8), Article 67. https://doi.org/10.1007/s00445-018-1241-1

The high mobility of dense pyroclastic density currents (PDCs) is commonly attributed to high gas pore pressures. However, the influence of spatial and temporal variations in pore pressure within PDCs has yet to be investigated. Theory suggests that... Read More about Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents.

Non-Hawaiian lithostratigraphy of Louisville seamounts and the formation of high-latitude oceanic islands and guyots (2018)
Journal Article
Buchs, D. M., Williams, R., Sano, S., & Wright, V. P. (2018). Non-Hawaiian lithostratigraphy of Louisville seamounts and the formation of high-latitude oceanic islands and guyots. Journal of Volcanology and Geothermal Research, 356, 1-23. https://doi.org/10.1016/j.jvolgeores.2017.12.019

Guyots are large seamounts with a flat summit that is generally believed to form due to constructional biogenic and/or erosional processes during the formation of volcanic islands. However, despite their large abundance in the oceans, there are still... Read More about Non-Hawaiian lithostratigraphy of Louisville seamounts and the formation of high-latitude oceanic islands and guyots.

Shifting landscapes: from coalface to quick sand? Teaching geography, earth and environmental sciences in UK higher education (2016)
Journal Article
Dyer, S., Walkington, H., Williams, R., Morton, K., & Wyse, S. (2016). Shifting landscapes: from coalface to quick sand? Teaching geography, earth and environmental sciences in UK higher education. Area, 48(3), 308-316. https://doi.org/10.1111/area.12261

In this paper we examine contemporary academic working lives, with particular reference to teaching-only and teaching-focused academics. We argue that intensification in the neoliberal university has significantly shifted the structure of academic ca... Read More about Shifting landscapes: from coalface to quick sand? Teaching geography, earth and environmental sciences in UK higher education.

Re-Os isotope and platinum group elements of a FOcal ZOne mantle source, Louisville Seamounts Chain, Pacific ocean (2015)
Journal Article
Tejada, M. L. G., Hanyu, T., Ishikawa, A., Senda, R., Suzuki, K., Fitton, G., & Williams, R. (2015). Re-Os isotope and platinum group elements of a FOcal ZOne mantle source, Louisville Seamounts Chain, Pacific ocean. Geochemistry, geophysics, geosystems G³, 16(2), 486-504. https://doi.org/10.1002/2014GC005629

The Louisville Seamount Chain (LSC) is, besides the Hawaiian-Emperor Chain, one of the longest-lived hotspot traces. We report here the first Re-Os isotope and platinum group element (PGE) data for Canopus, Rigil, and Burton Guyots along the chain, w... Read More about Re-Os isotope and platinum group elements of a FOcal ZOne mantle source, Louisville Seamounts Chain, Pacific ocean.

Temporal and spatial evolution of a waxing then waning catastrophic density current revealed by chemical mapping (2014)
Journal Article
Williams, R., Branney, M. J., & Barry, T. L. (2014). Temporal and spatial evolution of a waxing then waning catastrophic density current revealed by chemical mapping. Geology, 42(2), 107-110. https://doi.org/10.1130/G34830.1

We reconstruct the behavior of a catastrophic sustained radial pyroclastic density current as it waxed then waned during its brief lifespan. By subdividing the deposit into 8 time slices using a chemical tracer, we show that the sustained current ini... Read More about Temporal and spatial evolution of a waxing then waning catastrophic density current revealed by chemical mapping.

IODP Expedition 330 : drilling the Louisville Seamount Trail in the SW Pacific (2013)
Journal Article
Koppers, A. A., Yamazaki, T., Geldmacher, J., Anderson, L., Beier, C., Buchs, D. M., …Williams, R. (2013). IODP Expedition 330 : drilling the Louisville Seamount Trail in the SW Pacific. Scientific Drilling, 11-22. https://doi.org/10.5194/sd-15-11-2013

Deep-Earth convection can be understood by studying hotspot volcanoes that form where mantle plumes rise up and intersect the lithosphere, the Earth's rigid outer layer. Hotspots characteristically leave age-progressive trails of volcanoes and seamou... Read More about IODP Expedition 330 : drilling the Louisville Seamount Trail in the SW Pacific.

Limited latitudinal mantle plume motion for the Louisville hotspot (2012)
Journal Article
Koppers, A. A., Yamazaki, T., Geldmacher, J., Gee, J. S., Pressling, N., Hoshi, H., …Williams, R. (2012). Limited latitudinal mantle plume motion for the Louisville hotspot. Nature Geoscience, 5(12), 911-917. https://doi.org/10.1038/ngeo1638

Hotspots that form above upwelling plumes of hot material from the deep mantle typically leave narrow trails of volcanic seamounts as a tectonic plate moves over their location. These seamount trails are excellent recorders of Earth's deep processes... Read More about Limited latitudinal mantle plume motion for the Louisville hotspot.

Evaluation of the Titan2D two-phase flow model using an actual event: case study of the 2005 Vazcún Valley Lahar (2008)
Journal Article
Williams, R., Stinton, A. J., & Sheridan, M. F. (2008). Evaluation of the Titan2D two-phase flow model using an actual event: case study of the 2005 Vazcún Valley Lahar. Journal of Volcanology and Geothermal Research, 177(4), 760-766. https://doi.org/10.1016/j.jvolgeores.2008.01.045

Titan2D is a depth-averaged, thin-layer computational fluid dynamics (CFD) code, suitable for simulating a variety of geophysical mass flows. Titan2D output data include flow thickness and flow momentum at each time step for all cells traversed by th... Read More about Evaluation of the Titan2D two-phase flow model using an actual event: case study of the 2005 Vazcún Valley Lahar.