Andesite

Andesite is a type of volcanic rock that forms from magma during volcanic eruptions. It has a medium level of silica, making it intermediate in composition between basalt (low silica) and rhyolite (high silica). Andesite typically appears gray or light-colored and has a fine-grained texture, indicating rapid cooling. It is commonly found in volcanic mountain ranges and is often associated with subduction zone volcanoes. Its mineral content and physical properties make it an important material for construction and stone tools in some regions. Overall, andesite is a key component of Earth's volcanic landscape.