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At divergent boundaries is what metamorphism results from extrusion of basaltic lava?
A metamorphic rock formed from Basalt is Schist. a.k.a. Green Schist
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What kinds of magmas forms at divergent boundaries?
Usually a dense basaltic magma with low water content.
At what boundaries do you have volcanoes with magma rich in basalts?
Volcanoes with magma rich in basalt typically occur at divergent boundaries and hotspot locations. At divergent boundaries, such as mid-ocean ridges, tectonic plates pull apart, allowing magma to rise and create basaltic lava. Additionally, hotspots, which are areas where plumes of hot mantle material rise, can produce basaltic magma as seen in places like the Hawaiian Islands.
What type of boundary is along ocean ridges?
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.
What are the tectonic settings associated with the formation of basaltic composition magmas?
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.
What type of volcanic rock is generally found at divergent plate boundaries?
If the divergent boundary is located between two ocean plates, the lava that erupts will likely be called mafic. This lava is relatively low in silica but high in magnesium and iron.
What types of volcanic rocks are generally found at divergent plate boundaries?
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.
What kinds of magmas forms at divergent boundaries?
Usually a dense basaltic magma with low water content.
What kind of magma is formed at divergent boundaries?
Usually a dense basaltic magma with low water content.
What happened at divergent boundaries?
divergent boundaries happen when 2 plates move apart or divide
This type of magma is dark in color?
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.
What type of boundary is along ocean ridges?
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.
Which would you expect to cause the greatest amount of contact metamorphism an intrusion of basaltic magma or an intrusion of rhyolitic magma?
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.
What are the tectonic settings associated with the formation of basaltic composition magmas?
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.
What type of volcanic rock is generally found at divergent plate boundaries?
If the divergent boundary is located between two ocean plates, the lava that erupts will likely be called mafic. This lava is relatively low in silica but high in magnesium and iron.
What is the midatlantic ridge?
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.
Why are basalts produced on divergent plate boundaries?
As the plates diverge, upper mantle rock rises and undergoes decompression melting along the rift. Because the upper mantle is comprised of mafic rock, the subsequent melt of this rock produces a mafic magma. Basalt and its coarse-grained intrusive twin, gabbro, are produced when this mafic magma solidifies.
What type of magma forms at mid-ocean ridges?
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.
