How does the crystal size distribution in volcanic rocks provide information about magma ascent rates and residence times?

Oct 23, 2024 ... A global study of lavas from volcanic hot spots suggests that contrary to accepted wisdom, Earth's deep mantle may have the same composition ... In geology, hotspots (or hot spots) are volcanic locales thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle ... Aug 13, 2012 ... History of Yellowstone's Supervolcano · How the Yellowstone Caldera Formed · Testing the Volcano Mantle Plume Theory with Corn Syrup. The Hawaiian Islands are the youngest volcanic mountains in a long chain of volcanoes that formed over a hotspot. They are still forming today. Another hot spot ... ... hotspot volcanoes, Earth Plan. Sci. Lett., 60, 195–206. Article Google ... (1991) Volcano spacing and plate rigidity, Geology, 19, 397–400. Article ... 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 ... Here we present new age and geochemical data from volcanic samples from Richardson Seamount, the Agulhas Ridge along the Agulhas-Falkland Fracture Zone (AFFZ) ... Feb 11, 2020 ... A hotspot is a large plume of hot mantle material rising from deep within the Earth. A line of volcanoes develops as a plate moves over a hotspot. Apr 30, 2024 ... A hot spot is a region deep within Earth's mantle from which heat rises by convection. Grades 5 - 12+ Subjects Earth Science, Geology, Geography, Physical ... Sep 5, 2013 ... image: This is a map view of seismic shear-wave speed in the earth's upper mantle, highlighting the slow wave-speed channels (warm colors) ...