Question

this is a piece of granodiorite. granodiorite forms through the cooling of melted rock. do you see the mineral grains in this piece of granodiorite? the black mineral grains are crystals of the mineral biotite. the light - colored grains are crystals of minerals such as feldspar and quartz. what type of rock is granodiorite? igneous metamorphic sedimentary

Explanation:

火成岩是由熔融岩石冷却形成。文中提到花岗闪长岩通过熔融岩石冷却形成，符合火成岩特征。变质岩是原有岩石经变质作用形成，沉积岩是沉积物压实胶结而成，均不符合。

Answer:

igneous