Dacitic is a term used to describe a type of volcanic rock that is intermediate in composition between andesite and rhyolite. It typically contains a higher percentage of silica, usually ranging from 63% to 68%. Dacite is characterized by its light color, often appearing gray or light brown, and it may contain visible crystals of minerals such as quartz and plagioclase. Dacitic lava flows are generally more viscous than those of basalt, leading to steeper volcanic structures. This type of rock is commonly associated with explosive volcanic eruptions, which can produce pyroclastic flows and ash clouds. Dacitic formations are often found in volcanic arcs, particularly in regions like the Cascade Range in the United States.