Basaltic Lava And Granitic Lava

This makes granitic lava much more viscous and produces more clastic material and more violent eruptions.

Basaltic lava and granitic lava.

Basaltic magma contains between 45 and 55 percent silicon dioxide and is high in magnesium iron and calcium while granitic magma contains between 65 and 75 percent silicon dioxide and only small amounts of those minerals. Eruptions of granitic lava usually entail a composite cone volcano which produces both lava and pyroclastic material while. The textbook answer would be granitic or rhyolitic lava. Granitic or rhyolitic lava has a much higher silica content than basaltic lava.

The mineral content of both types is dominated by feldspar with rhyolite containing potassium feldspar and basalt containing sodium and or calcium feldspar. In reality composite volcanoes are highly variable erupting the full range from basaltic to rhyolitic granitic materal and everything in. Granitic lava does not exist for one. Granite is intrusive forms below ground while basalt is extrusive forms above ground.

Granitic magma has high levels of potassium and sodium while basaltic magma has very low levels of these minerals.