Obsidian is an igneous rock that is formed from the erupted lava of a volcano. Obsidian is made of felsic type material, rich in feldspar and quartz, which is high in silicate minerals. This formed...
Sedimentary rocks are comprised of varying sizes of grains of rock or organic fragments which are called sediment. They are set apart into three different types of sedimentary rock; clastic, biogenic, and chemical. These...
The common characteristic for metamorphic rocks is they are formed by existing igneous or sedimentary rock that has undergone a chemical or physical change. This change is due to great amounts of heat and...
Igneous rocks are rocks that are created beneath the earth in the earths mantle or above on the earth’s surface. An igneous rock is either an intrusive or extrusive rock and can have one...