3 Types of Rocks
Igneous – Sedimentary – Metamorphic
Minerals can form on the surface through evaporation of solutions containing dissolved minerals. Minerals can form beneath the surface when dissolved elements and compounds leave a hot water solution or when materials melted in magma/ lava then cools & hardens.
There are approximately 3800 known minerals. About 30 to 50 new minerals are described and one or two minerals are discredited each year. The most complete listing of minerals is J. Mandarino Fleischer’s Glossary of Mineral Species 1999 published by the Mineralogical Record.
Earth Day is celebrated every year on the 22nd of April. In 1970, a senator from Wisconsin, USA, Gaylord Nelson first conceived of this day. The senator was worried about the rate of industrialization and the careless attitude of everyone towards our environment.