GeraldineEllisgp1420
A metamorphic rock formed from Basalt is Schist. a.k.a. Green Schist
Ellen Funk
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β 12y agocontact
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β 13y agoContact metamorphism.
Usually a dense basaltic magma with low water content.
Constructive or divergent. The ridge formed is of basaltic rock type (though this is a generalisation), and is a source of volcanic activity. Iceland was formed as a result of the sea-floor spreading.
Basaltic composition magmas are commonly associated with divergent plate boundaries where seafloor spreading occurs, such as mid-ocean ridges. They can also form in hot spots, such as Hawaii, where mantle plumes rise through the crust. Additionally, basaltic magmas can be generated at convergent plate boundaries where oceanic crust subducts beneath continental crust.
Basalt is the most common type of volcanic rock found at divergent plate boundaries due to its low silica content, which allows it to flow easily and form extensive lava flows.
Basalts are produced on divergent plate boundaries because the extensional forces at these boundaries cause the mantle to melt, generating magma that rises to the surface and solidifies as basaltic rock. This process, known as decompression melting, occurs due to the reduced pressure on the mantle rocks as the tectonic plates move apart, leading to the formation of basaltic oceanic crust.
Basaltic rocks are generally found at divergent plate boundaries. These rocks form from the solidification of lava that erupts from mid-ocean ridges and oceanic rift zones, which are common features at divergent plate boundaries. Basaltic rocks have a low silica content and are dark in color.
Usually a dense basaltic magma with low water content.
Usually a dense basaltic magma with low water content.
divergent boundaries happen when 2 plates move apart or divide
This type of magma is called basaltic magma. It has a lower silica content, which gives it a darker color compared to other types of magma. Basaltic magma is commonly associated with volcanic activity at divergent plate boundaries.
Volcanoes that form on converging plate boundaries are typically stratovolcanoes or composite volcanoes. These volcanoes are formed by the subduction of one tectonic plate beneath another, leading to the formation of a volcanic arc and explosive eruptions due to the melting of the subducted plate. Examples include the Cascade Range in the U.S. and the Andes in South America.
Constructive or divergent. The ridge formed is of basaltic rock type (though this is a generalisation), and is a source of volcanic activity. Iceland was formed as a result of the sea-floor spreading.
Basaltic composition magmas are commonly associated with divergent plate boundaries where seafloor spreading occurs, such as mid-ocean ridges. They can also form in hot spots, such as Hawaii, where mantle plumes rise through the crust. Additionally, basaltic magmas can be generated at convergent plate boundaries where oceanic crust subducts beneath continental crust.
An intrusion of basaltic magma would likely cause greater contact metamorphism compared to an intrusion of rhyolitic magma. Basaltic magma has higher temperatures and higher fluidity, allowing it to heat surrounding rocks more effectively and induce more intense metamorphic changes.
Basalt is the most common type of volcanic rock found at divergent plate boundaries due to its low silica content, which allows it to flow easily and form extensive lava flows.
The Mid-Atlanic Ridge is the divergent boundary that is responsible for seafloor spreading. Consisting mostly of divergent boundaries, with transform faults as well, this is the site where new oceanic crust is added, increasing the size of the ocean. This location is dotted with underwater volcanoes as igneous basaltic magma is added to fill in the gap left as the oceanic plates drift away.
Mid-ocean ridges typically produce basaltic magma, which is low in silica content and flows easily. This type of magma is associated with fast-spreading divergent plate boundaries and results in the formation of oceanic crust.