How do the textures of volcanic rocks (e.g., vesicular, porphyritic) provide clues about eruption processes?

A 30 foot slice of volcano looks like most other rocky terrain. Unless it ... hotspot, volcanoes would form. They would build enormous shield-shaped ... Volcanoes grow above hotspots. A hotspot is a zone of melting above a mantle plume. · Hotspot volcanoes are better able to penetrate oceanic crust than ... Sep 5, 2013 ... The model revealed channels – dubbed “low-velocity fingers” by the researchers – where seismic waves traveled unusually slowly. The fingers ... The Iceland hotspot and mighty geological phenomena. Iceland sits spanning the Mid-Atlantic Ridge tectonic plate boundary which separates the Eurasian and ... Axial Seamount is the most active submarine volcano in the NE Pacific. It is a basaltic hotspot volcano superimposed on the Juan de Fuca Ridge spreading ... But a significant number of volcanoes (think Hawaii) are mid-plate “hotspot” volcanoes. ... hotspots like the Yellowstone super volcano? Not really. It ... It is this that fuels a chain of volcanoes, such as the Aleutian Islands, near Alaska. Hotspot volcanic chains. The joint mantle plume/hotspot hypothesis ... 2. How does magma get to the Earth's crust to create a hotspot volcano? · Magma travels to Earth's surface through an upward tunnel from deep within Earth. 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 ... Apr 28, 2011 ... 1) What is a hotspot? A volcanic "hotspot" is an area in the upper mantle from which heat rises in a plume from deep in the Earth.