GEOLOGY

Detailed explanation-1: -All types of magma have a significant percentage of silicon dioxide.

Detailed explanation-2: -Magma and lava contain three components: melt, solids, and volatiles. The melt is made of ions from minerals that have liquefied. The solids are made of crystallized minerals floating in the liquid melt.

Detailed explanation-3: -Rhyolitic magma contains the most silica. Other types of magma have less silica in them. Basaltic magma has only 45 to 55 percent silica, and andesitic magma has about 55 to 65 percent. Rhyolitic magma also has a lower temperature than the other magma but higher viscosity and gas content.

Detailed explanation-4: -No matter what type of magma you have, silica is the main ingredient. What determines the type of magma is the percentages of silica and present. Magmas with high silica content have a high viscosity (resistance to flow) and are generally more explosive when eruptions occur.

Detailed explanation-5: -Andesitic rocks are often found at continental volcanic arcs, such as the Andes Mountains in South America, after which they are named. Felsic MagmaFelsic magma has the highest silica content of all magma types, between 65-70%.