The 3 types of Rocks
By: Alexis and carson
igneous extrusive rock
Extrusive rock is characterized by fine-grained textures because they rapidly cool either at or near the earths crust. Therefore, there is not enough time for crystals to grow. Rock with this type of fine-grained texture is called aphasic.
Metamorphic rocks are made when existing rocks are under a lot of heat and pressure or by the chemical action of liquids. By changing its chemical structure, this changes the structure of the minerals, which then turns into rock. By changing the structure it simply means changing the order the layers of the minerals within the rock.
sedimentary rock is made of large, greater than two mm in diameter clast size rocks. Clasts are are formed by multiple small rocks and rock material. Some examples of this type of large coasts include granules, pebbles, cobbles, and boulders.
sand stone is a type of rock.
Sandstone is a clump of rocks made up of mainly sand-sized minerals or rock grains. Sandstone is like sand, the most common colors are tan, brown, yellow, red, grey, pink, white, and black.