...Adam Kent Whether such periods of magma residence at relatively cold temperatures also occur in supervolcano systems is an interesting question. For their diffusion calculations, Pamukcu et al. use temperatures based on independent petrological estimates of the temperature of formation of quartz...

... inferred from seismic data at active supervolcanoes. The connection of magma batches vertically distributed over several kilometers in the upper crust would cause a substantial increase of buoyancy overpressure, providing an eruption trigger mechanism that is the direct consequence of the reservoir...

... with extreme hazard and environmental impact at all scales, they are the windows through which we may view batholith formation, and their magmatic systems are vital to the evolution of the continental crust. Recently, attention has focused on CFEs and their relation to supervolcanoes and the volcano-plutonic...

... of Elements , we consider key issues that reflect both the scientific and social importance of these awe-inspiring phenomena: the products and processes of the eruptions themselves, the nature and evolution of the shallow magma chambers that feed them, the monitoring of active supervolcano systems...

...Calvin Miller; David Wark; Steve Self; Steve Blake; Dave John © 2008 by the Mineralogical Society of America 2008 1 How many supervolcanoes/supereruptions are known? Are there many more than are mentioned in the papers in this issue? There have been far more supereruptions than...

...David A. John Abstract Do supervolcanoes form metallic ore deposits? If so, what types of deposits do they form and how large are they? © 2008 by the Mineralogical Society of America 2008 supervolcano metallic ore deposits hydrothermal systems supervolcano life cycle ash-flow caldera...

... the eruption sequence can be determined. These erupted products and their ordering in time permit reconstruction of the parental magma chamber. Supervolcanoes also have smaller eruptions that provide snapshots of magma chamber development in the lead-in to and aftermath of supereruptions. Many aspects...

... and compositional homogenization show that the duration of supervolcano magma accumulation could be significantly shorter than this. Crystals in supervolcano magmas may have protracted growth histories and may grow from chemically different hosts as crystallization progresses. Semisolid crystal mushes rather than...

...Ashton F. Flinders; David R. Shelly; Philip B. Dawson; David P. Hill; Barbara Tripoli; Yang Shen Abstract A little more than 760 ka ago, a supervolcano on the eastern edge of California (United States) underwent one of North America’s largest Quaternary explosive eruptions. Over this ∼6-day-long...

... in the acid Permian supervolcanoes. The migmatitic xenolith provides the first documented evidence for a Permian thermal event associated with crustal thinning in the Eastern Southern Alps. Here the South Alpine basement escaped most of the Alpine crustal shortening and still preserves most of the original...

... magmatism, including supervolcano-scale eruptions, occurred in both the Coastal Maine magmatic province and the Central Maine magmatic belt during two phases of accretion of Avalonia to the margin of North America in the Late Silurian and Early Devonian. The magmatic complexes of both coastal and central...

... of polar mesospheric clouds after the A.D. 1883 Krakatau (Indonesia) eruption, are both consistent with levitation of ash into the mesosphere. Supervolcano eruptions are likely to inject significant quantities of charged ash into the ionosphere, resulting in disturbance or collapse of the global electrical...

... with a major supervolcano eruption in the Mediterranean. Thus, precise determination of the timing and duration of the Laschamp excursion would help in elucidating major scientific questions situated at the intersection of geology, paleoclimatology, and anthropology. Here we present a North American speleothem...

... to ascend into the crust. The top of the conductive layer is at its shallowest, in the upper crust, directly beneath the modern Yellowstone supervolcano. 18 7 2011 22 12 2011 30 12 2011 © 2012 Geological Society of America 2012 The Snake River Plain–Yellowstone (Idaho...

...Jacob B. Lowenstern; Shaul Hurwitz Abstract Although giant calderas (“supervolcanoes”) may slumber for tens of thousands of years between eruptions, their abundant earthquakes and crustal deformation reveal the potential for future upheaval. Any eventual supereruption could devastate global human...