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R. S. J. Sparks
Researcher at University of Rhode Island
Publications - 11
Citations - 1544
R. S. J. Sparks is an academic researcher from University of Rhode Island. The author has contributed to research in topics: Caldera & Pyroclastic rock. The author has an hindex of 10, co-authored 11 publications receiving 1502 citations.
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Gas release rates from pyroclastic flows: a assessment of the role of fluidisation in their emplacement
TL;DR: In this article, the rates of release of dissolved water from the particles in a pyroclastic flow by diffusion are estimated for flows of thickness 1 to 20 m, which experimental studies demonstrate are the velocities required to fluidise fine to medium ash.
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Characteristics of widespread pyroclastic deposits formed by the interaction of silicic magma and water
Stephen Self,R. S. J. Sparks +1 more
TL;DR: The phreatomagmatic analogue of plinian tephra is the phreatoplinian pyroclastic deposits as mentioned in this paper, formed by the interaction of water and silicic magma during explosive eruptions.
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Field measurements of the rheology of lava
H. Pinkerton,R. S. J. Sparks +1 more
TL;DR: In this paper, the authors present data on the rheological properties of small lava flows which were erupted on Mount Etna in 1975, using field measurements using a new field viscometer, a shear vane attached to a torque wrench, a conventional penetrometer and various field techniques for estimating rheology properties from the dimensions of lava flows.
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Effect of degassing on rheology of basaltic lava
R. S. J. Sparks,H. Pinkerton +1 more
TL;DR: The authors proposed a model to explain the variations in the surface morphology of many basaltic lava flows before and after an eruption, which may explain the observed non-newtonian characteristics of many lava flows.
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The exceptional magnitude and intensity of the Toba eruption, sumatra: An example of the use of deep-sea tephra layers as a geological tool
TL;DR: In this paper, the authors investigated the thickness, grain size and texture of the Toba deep-sea tephra layer in order to demonstrate the use of deep sea tectra layers as a volcanological tool.