What are hyaloclastites and pillow lavas, and how do they form in submarine eruptions at hotspots?

hotspot ... hotspot, region of Earth's upper mantle that upwells to melt through the crust to form a volcanic feature. Most volcanoes that cannot be ascribed ... But a significant number of volcanoes (think Hawaii) are mid-plate “hotspot” volcanoes. ... hotspots like the Yellowstone super volcano? Not really. It ... In an oceanic hotspot environment, for example Hawaii, dark, silica-poor basalt magma is produced. The runny basalt forms broad sloping shield volcanoes (Fig. 6) ... Shield volcanoes are built almost entirely of low viscosity (very thin, liquidity) fluid lava flows. Flow after flow pours out in all directions from a central ... Jan 1, 2020 ... Island lifetime depends on the rate and magnitude of island subsidence, which, in turn, depends on the dynamics of the oceanic lithosphere and ... The hotspot is fixed, so as the plates move, the first volcano moves away from the source of magma, and then becomes extinct. A new volcano forms over the ... May 4, 2020 ... Non-hotspot volcano chains from small-scale sublithospheric ... Short-lived and discontinuous intraplate volcanism in the South Pacific: Hot spots ... Jan 1, 2020 ... Island lifetime depends on the rate and magnitude of island subsidence, which, in turn, depends on the dynamics of the oceanic lithosphere and ... A frequently-used hypothesis suggests that hotspots form over exceptionally hot regions in the mantle, which is the hot, flowing layer of the Earth beneath the ... May 6, 2022 ... Most hotspot volcanoes are basaltic (e.g., Hawaii, Tahiti). As a result, they are less explosive than subduction zone volcanoes, in which water ...