The vast majority of lava out there falls into one of three types: mafic, intermediate, and felsic. They're also called basaltic, andesitic, and rhyolitic lavas, respectively. (There are other ...

Felsic lavas are often associated with explosive, violent eruptions, such as the Mt. St. Helens eruption of 1980. All of the volcanic rocks returned from the Moon by the Apollo astronauts are mafic.

The mafic or basaltic magma, which is only about 45 to 55 percent silicon dioxide, can be a very hot 1,832 to 2,192 degrees Fahrenheit. Molten rock that glows red is probably in the felsic ...

These broad, low angle volcanoes erupt mafic lava with low viscosity, this low viscosity is due to a relatively low silicate concentration in the magma. Mafic rocks are rich in iron and magnesium ...

Abstract Mafic enclaves from three plutons in the Chilliwack batholith have been compared with contemporaneous mafic stocks in order to determine (1) the processes by which mafic and felsic magmas ...

He contends felsic rocks can form anytime mafic rocks sink deep within Earth—and not only along subduction zones. In fact, he argues this process can occur on a motionless plate.