WebOnly igneous rocks – rocks that cooled from a molten magma – can have vesicles. Very few (less than 1 in 1000) meteorites have interior vesicles because the interior of most meteorites was never molten. Many … WebA magmas silica content will not only control the rock type that forms, it also controls the relative viscosity of the magma. Differences in a magmas viscosity will determine the …

Which magma type would generally have the lowest viscosity ...

WebA decrease in the confining pressure causes the explosive ejection of magma by expanding and escaping gases. O b. The Show transcribed image text Expert Answer 2. Volume of magma The volume of magma has not much to do with the viscosity as compared to the other factors listed such as compo … View the full answer Transcribed image text: WebJul 22, 2024 · The viscosity of a magma is affected by its silica content and temperature. The amount of silica influences the magma’s viscosity in such a way that if the silica content is low the magma would have low viscosity whereas a high content of silica would make the magma more thick and sticky. What role does silica play in eruptions? omicron t srl

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Magma consists of liquid rock that usually contains suspended solid crystals. As magma approaches the surface and the overburden pressure drops, dissolved gases bubble out of the liquid, so that magma near the surface consists of materials in solid, liquid, and gas phases. Most magma is rich in silica. Rare nonsilicate magma can form by local melting of nonsilicate mineral deposits or by separation of a magma into separate immiscible silicate and nonsilicate liq… WebViscosity is the resistance to flow (opposite of fluidity). Viscosity depends on primarily on the composition of the magma, and temperature. Higher SiO 2 (silica) content magmas have higher viscosity than lower SiO 2 content … Web3.2 Magma and Magma Formation. Magmas can vary widely in composition, but in general they are made up of only eight elements; in order of importance: oxygen, silicon, aluminum, iron, calcium, sodium, magnesium, and potassium (Figure 3.2.1). Oxygen, the most abundant element in magma, comprises a little less than half the total, followed by ... is aristotle a relativist