How are hotspot volcanoes different from other volcanoes?

How are hotspot volcanoes different from other volcanoes?

A hot spot is fed by a region deep within the Earth’s mantle from which heat rises through the process of convection. Hot spot volcanism is unique because it does not occur at the boundaries of Earth’s tectonic plates, where all other volcanism occurs. Instead it occurs at abnormally hot centers known as mantle plumes.

How are hotspot volcanoes different from plate boundary volcanoes?

Hot spot volcanoes occur far from plate boundaries. Because the hot spot is caused by mantle plumes that exist below the tectonic plates, as the plates move, the hot spot does not, and may create a chain of volcanoes on the Earth’s surface.

How does the formation of volcanoes at hot spots differ from the formation of volcanoes at convergent boundaries?

The new magma (molten rock) rises and may erupt violent- ly to form volcanoes, often forming arcs of islands along the convergent boundary. While the process is volcanic, volcanoes and earthquakes along oceanic spreading ridges are not as violent as they are at convergent plate boundaries.

How are hotspot volcanoes different from island arc volcanoes?

An island arc forms at a converging plate boundary where one oceanic plate sinks beneath another oceanic plate. A hot spot volcano forms in continental or oceanic crust where magma from the mantle erupts.

Are hotspot volcanoes Shield volcanoes?

A hotspot is thermally expanded buoyant mantle (bigger hot mantle that floats), which lifts an overlying plate. 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).

How does a volcanic hotspot create volcanic islands?

A volcanic “hotspot” is an area in the mantle from which heat rises as a thermal plume from deep in the Earth. As the tectonic plate moves over the stationary hot spot, the volcanoes are rafted away and new ones form in their place. This results in chains of volcanoes, such as the Hawaiian Islands.

How is hot spot volcanic magma different from subduction zone volcanic magma?

Most hotspot volcanoes are basaltic (e.g., Hawaii, Tahiti). As a result, they are less explosive than subduction zone volcanoes, in which water is trapped under the overriding plate. Where hotspots occur in continental regions, basaltic magma rises through the continental crust, which melts to form rhyolites.

How are volcanoes at hot spots different from those at subduction zones quizlet?

Hot spot volcanoes are made from magma from the asthenosphere, Subduction zone volcanoes are made from melted ocean plate. The earthquakes don’t vertically displace the water in the ocean.

What is the difference between convergent collision and convergent subduction?

A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other, a process known as subduction. Subduction begins when this dense crust converges with less dense crust.

What is the difference between how a volcano is formed at a convergent vs a divergent boundary?

Melting is common at convergent plate boundaries. Convergent plate boundaries line the Pacific Ocean basin so that volcanic arcs line the region. Melting at divergent plate boundaries is due to pressure release. At mid-ocean ridges seafloor is pulled apart and new seafloor is created.

What is the difference between hotspots and island arcs?

Hotspot volcanoes are also known as “intra-plate” volcanoes, and the islands they create are known as Volcanic Ocean Islands. oceanic arcs form when oceanic crust subducts beneath other oceanic crust on an adjacent plate, creating a volcanic island arc.

Why are hotspot volcanoes shield?

A hotspot is thermally expanded buoyant mantle (bigger hot mantle that floats), which lifts an overlying plate. In an oceanic hotspot environment, for example Hawaii, dark, silica-poor basalt magma is produced. The runny basalt forms broad sloping shield volcanoes (Fig.