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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), doi: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

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. doi: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

Shifting landscapes: from coalface to quick sand? Teaching geography, earth and environmental sciences in UK higher education (2016)
Journal Article
Walkington, H., Williams, R., Dyer, S., 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). doi:10.1111/area.12261. ISSN 0004-0894

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

Temporal and spatial evolution of a waxing then waning catastrophic density current revealed by chemical mapping (2014)
Journal Article
Williams, R., Barry, T. L., & Branney, M. J. (2014). Temporal and spatial evolution of a waxing then waning catastrophic density current revealed by chemical mapping. Geology, 42(2), (107-110). doi:10.1130/G34830.1. ISSN 0091-7613

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

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. doi: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

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). doi:10.1016/j.jvolgeores.2008.01.045. ISSN 0377-0273

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