Tag «what is a basaltic magma»

Volcanic Activity and Plate tectonics

According to the plate tectonic theory, there are three principal zones of volcanic activities: (i) spreading centers, (ii) subduction zones, (iii) regions within the plates themselves. Let us first study the origin of magma and its relations to plate tectonics. Origin of Magma: Basaltic Magma: Most basaltic magma is believed to originate in partially molten …