Mafic lavas are hot, high in silica, low in volatiles, and relatively viscous. Volcanic lavas are called felsic lavas, and they are usually cooler and include high levels of silica and volatiles.

The high viscosity and gas content of intermediate magma build pressure below the Earth's surface. contains a high percentage of silica, up to 70 percent. Magnesia can trap gas bubbles in the magma ...

Thanjavur: The state govt is mulling a project to extract high-value silica from rice husk, a byproduct of rice milling.