What factors determine the type of magma found in a volcano?
Terms in this set (5) What factors determine the type of volcanic eruption? Magma composition, magma temperature, and the amount of dissolved gasses in the magma.
What determines the viscosity of lava?
Viscosity of Magmas Viscosity depends on primarily on the composition of the magma, and temperature. Higher SiO2 (silica) content magmas have higher viscosity than lower SiO2 content magmas (viscosity increases with increasing SiO2 concentration in the magma).
What factors determine the type of volcanic eruption?
The style of eruption depends on a number of factors, including the magma chemistry and content, temperature, viscosity (how runny the magma is), volume and how much water and gas is in it, the presence of groundwater, and the plumbing of the volcano.
What 3 factors affect the viscosity of magma?
The three factors that influence the viscosity of a lava are temperature, the dissolved gases it contains, and its chemical composition.
What causes the magma to rise?
Magma can rise when pieces of Earth’s crust called tectonic plates slowly move away from each other. Magma also rises when these tectonic plates move toward each other. When this happens, part of Earth’s crust can be forced deep into its interior. The high heat and pressure cause the crust to melt and rise as magma.
Which type of volcano has the highest viscosity?
Can lava be white?
How does lava become white? No lava is actually white. They might look white because they are so hot that they give off a white color, but that is almost impossible for us to see.
Can lava be pink?
The color of lava depends on the temperature of the flow as well as the chemical composition and any impurities that are in the liquid rock. Colors can include black, red, gray, brown and tan, metallic sliver, pink, and green. When lava cools it also forms a myriad of different shapes and types of lava.
What is black runny lava called?
If the lava is very hot and has a low viscosity (runny with a low gas and silica content) the lava flow is called Pahoehoe. If, on the other hand, the lava has a high viscosity (thick and pasty with a high gas and silica content) it is called Aa. Pahoehoe (Pa-Hoy-Hoy) lava flows are very hot, thin and runny.
What is hotter lava or blue fire?
The hottest fires are from oxyacetylene torches (about 3000 degrees Centigrade) that combine oxygen and gas to create pinpoint blue flames. The temperature of lava when it is first ejected from a volcanic vent can vary between 700 and 1,200 degrees C (1,300 to 2,200 F).
What is green lava?
The green gems are olivine crystals, a common mineral found in Hawaii’s lava. At jewelry quality, the mineral is called peridot. As the volcano erupts, it blasts apart molten lava, allowing for green olivine minerals to be separated from the rest of the melt and fall as tiny gemstones