Web3. CIRCLE which of the following type of volcanism is the highest volume in a given year: hotspot subduction zones divergent plate boundaries 4. How do magmas form under hotspots? 5. How do magmas form under subduction zones? 6. How do magmas form under divergent plate boundaries? WebSep 26, 2024 · Major hot spots include the Iceland hot spot, under the island of Iceland in the North Atlantic; the Réunion hot spot, under the island of Réunion in the Indian Ocean; and the Afar hot spot, located under northeastern Ethiopia. Volcanic activity at hot spots can create submarine mountains known as seamounts.
Magma - Wikipedia
WebFeb 14, 2024 · A hotspot is a place in the upper mantle of the Earth at which extremely hot magma from the lower mantle upwells to melt through the crust usually in the interior of a tectonic plate to form a volcanic feature. • These are hotspots beneath the lithosphere caused by rising plumes of hot mantle material. WebOver short geological timescales the hotspots appear to be fixed relative to one another, forming a reference frame against which plate motions can be measured. As tectonic plates move relative to a hotspot, the location of magmatic activity on the plate shifts, causing the development of time-progressive chains of volcanoes such as the ... diane crawford artist
Magmatism • GeoLearning • Department of Earth Sciences
WebMay 20, 2024 · A hot spot is an area on Earth that exists over a mantle plume. A mantle plume is an area under the rocky outer layer of Earth, … WebChapter 4 Summary. The topics covered in this chapter can be summarized as follows: 4.1. Plate Tectonics and Volcanism. Volcanism is closely related to plate tectonics. Most volcanoes are associated with convergent plate boundaries (at subduction zones), and there is also a great deal of volcanic activity at divergent boundaries and areas of ... WebPlutonic igneous rocks: A) solidify above the surface of the ground AND form by crystallization of magmas intruded into surrounding rocks. B) solidify above the surface of the ground. C) solidify below the surface of the ground AND form by crystallization of magmas intruded into surrounding rocks. diane craft brain integation therapy review