The Hawaiian islands formed when molten material erupted from the ocean floor. As the lava flowed out, cooled, and hardened, massive rocks formed. These rocks have a very fine texture and tiny crystals that cannot be seen with the naked eye. These massive rocks formed into the islands that are present today.

What type of igneous rock are the Hawaiian islands?

1 answer

The Hawaiian islands are primarily composed of basalt, which is a type of igneous rock. Basalt is formed from the rapid cooling and solidification of lava that flows out of volcanoes, resulting in a fine-grained texture with small crystals. This rock is typically dark in color and is the predominant rock type found in volcanic islands like those in Hawaii.