Question

Which is the most accurate statement about viscosity and magma? The viscosity of magma is controlled by the amount of gas dissolved in the magma. Rhyolitic (felsic) magmas have relatively high viscosity and lead to explosive eruptions. High viscosity magmas flow at higher speeds than low viscosity magmas. Basaltic (mafic) magmas are hotter and have higher viscosity than felsic magmas.

Answer 1

Answer:

Basaltic (mafic) magmas are hotter and have higher viscosity than felsic magmas

Explanation:

• The most accurate statement related to the viscosity of magma is the amount of silica content in this as more the vicious magma will be more is the content of deadly gases and thus more rapid and dangerous will be the explosion of lavas with gas.

• The higher the amount of gas and the high level of felsic lava produced has a higher velocity and explosive rate thus is more silicic  which is a result of the chemistry, which is high in aluminum, potassium, sodium, and calcium contents forming a liquid rich lava and temperature can go high as 650 to 750 degrees.

• As compared to the mafic lava have a higher concentration of ferromagnesian which can generally erupt at a temperature of more than 950 degrees. Thus flow at higher speeds and for longer distances.