Posts tagged as rocks

Formation of Igneous Rocks – Sample Answer

Igneous rocks are formed when magma is cooled, either inside the earth’s crust or on the earth’s surface. Plutonic igneous rocks are formed when molten rock cools and hardens below the surface e.g. granite. Volcanic igneous rocks are formed when molten rock cools and hardens on the surface, e.g. baslat…. Continue Reading →

Introduction to different rock types

Igneous Rocks Igneous rocks are formed when molten rock cools and hardens. Igneous rocks have crystals. The large crystals are formend in rocks that cooled slowly (deep in the crust). The small crystals are found in rocks that have cooled quickly on the surface. Plutonic igneous rocks are formed when magma cools within the earth’s crust. eg. granite. Volcanic igneous rocks are formed when molten rock cools… Continue Reading →