Felsic refers to a category of igneous rocks that are rich in silica and light-colored minerals, such as quartz and feldspar. These rocks typically have a high viscosity, meaning they are thick and sticky when molten. Common examples of felsic rocks include granite and rhyolite, which are often found in continental crust. Felsic rocks are formed from the cooling and solidification of magma that has a high concentration of silica. Due to their composition, they tend to erupt explosively, creating volcanic features like calderas and tuff. Their lighter color and lower density distinguish them from mafic rocks, which are darker and richer in iron and magnesium.