"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. Felsic rocks are often found in continental crust and are associated with volcanic activity. Their formation usually occurs in environments where magma cools slowly, allowing large crystals to develop. The high silica content contributes to their lighter color and lower density compared to mafic rocks, which are darker and richer in iron and magnesium.