Volcanic Eruptions

Types of Lava

There are three different types of Mafic lava; Pahoehoe,Aa, and Blocky lava.

Mafic magma has a low viscosity meaning the lava moves much slower. It contains magnesium and Iron. It has less trapped gases and is dark in color. Mafic lava causes quiet eruptions.

Shield Volcanoes

Volcanic cones that are broadat the base and have gently sloping sides are called Shield volcanoes. It covers a wide area and. Generally forms from quiet eruptions. Layers of hot lava flow out around the vent,harden and slowly build up to form the cone.