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What is the relationship in the silicon content and the viscosity of magma?
There is an inverse relationship between magma viscosity and silicon content. Lavas erupting from basaltic volcanoes (like Hawaii) have a much lower viscosity and are much hotter than those erupted by volcanoes whose magmas are rich in silicon. There may be up to 8 orders of magnitude viscosity difference between basaltic magmas (SiO2 contents or about 45 %) and rhyolitic magmas (SiO2 > 70 %).
Andesitic rocks have mineral compositions between those of basaltic rocks and?
granitic
Fluid basaltic lavas like those in hawaii commonly form what?
Fluid basaltic lavas such as rhyolite and dacite typically form thick short lavas namely lava spines, lava domes or coulees.
How a doline is formed?
Dolerite is a dark, igneous rock. It is formed under basaltic volcanoes, like those at mid-ocean ridges. It cools pretty quickly when magma moves into the fractures and weak zones below a volcano. Because it cools so quickly, you can see large crystals on the rock. Once the magma moves into the rock, it forms dikes and or sills.
Are The elements found in magma are quite different from those found in Earths crust?
true.. i think
What is the relationship in the silicon content and the viscosity of magma?
There is an inverse relationship between magma viscosity and silicon content. Lavas erupting from basaltic volcanoes (like Hawaii) have a much lower viscosity and are much hotter than those erupted by volcanoes whose magmas are rich in silicon. There may be up to 8 orders of magnitude viscosity difference between basaltic magmas (SiO2 contents or about 45 %) and rhyolitic magmas (SiO2 > 70 %).
Andesitic rocks have mineral compositions between those of basaltic rocks and?
granitic
What is igneous that have mineral composistions between those grantic and basaltic rocks?
andesitic rock
Fluid basaltic lavas like those in hawaii commonly form what?
Fluid basaltic lavas such as rhyolite and dacite typically form thick short lavas namely lava spines, lava domes or coulees.
How a doline is formed?
Dolerite is a dark, igneous rock. It is formed under basaltic volcanoes, like those at mid-ocean ridges. It cools pretty quickly when magma moves into the fractures and weak zones below a volcano. Because it cools so quickly, you can see large crystals on the rock. Once the magma moves into the rock, it forms dikes and or sills.
What kind of magma produce violent eruptions?
The magma that can produce a violent eruptions is those rich in silica,fluid,iron, and forming shield volcano.
What properties of magma help determine the type of eruption?
The properties of magma that help to determine the type of eruption are the magma's viscosity and its silica content. Those volcanoes that exhibit massive eruptions have a high viscosity and high silica content.
Why does a runny volcano not explode?
The explosive force of an explosive eruption comes from gasses trapped in the magma. Runny magma does not hold gasses very well, and so those gasses escape before the magma erupts. The runny magma can also easily flow to the surface without getting stuck and having to be blown out, unlike thicker types of magma.
Why are the enzymes used in cellular respiration virtually identical in all species?
the same genetic code produces those enzymes.
Minerals that form from magma are formed by?
Several minerals form in slow cooling magma. Some of those minerals are quartz, plagioclase feldspar, and potassium feldspar. These are the same minerals that are found in granite.
Is it true that the elements found in magma are quite different from those found in earths crust?
Yes
Are The elements found in magma are quite different from those found in Earths crust?
true.. i think
