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 ...

This “felsic” lava is far less common than the more fluid types you tend to see at, for example, ... When this lava flows, its margins cool far more quickly than the hotter cores.

The dark, smooth maria of the Moon is made up of lava flows, ... Felsic lavas are often associated with explosive, violent eruptions, such as the Mt. St. Helens eruption of 1980.

Once you're above 67% by weight silica, you're into "silicic" or "felsic" lava, typified by rhyolite. ... The former is more benign, like the Holuhraun lava flows in Iceland.

Rhyolitic lava is felsic; the name is derived from feldspar and silica, which are present in high concentrations ... a massive basaltic lava flow covered much of India. The eruptions that created the ...