af Elise Low 15 år siden
2095
Rocks of the Earth
The Earth's crust is composed of various types of rocks that undergo continuous transformation through the rock cycle. Igneous rocks form from cooled and hardened magma, with coarse-grained types like granite originating from slow cooling within the Earth'
Åben
Rocks of the Earth The rock cycle The continual process by which rocks change from one type to another Metamorphic rocks Coarse-grained sandstone Fine-grained Shale A rock that is completely transformed or changed from an igneous or sedimentary rock under intense heat or pressure Sedimentary rocks formed by the cementing and hardening of layers of sediments under pressure from the overlying layers Igneous rocks Fine-grained igneous rocks Eg. Basalt formed when lava cools and hardens quickly on the Earth's surface. Coarse-grained igneous rocks Eg. Granite formed when magma cools and hardens slowly in the Earth's interior Igneous rocks are magma that has cooled and hardened, either beneath or above the Earth's surface Rocks are solid materials of the Earth's crust
