which group of minerals are the most abundant in the earth's crust
Building Blocks of The Earthâs Crust. Silicates are the most widespread of the minerals. They are made up of oxygen and silicon the number one and number two most abundant elements in the earth's crust. By themselves they make up over 90% of the weight of the earthâs crust. Most rocks are composed mainly of this class of minerals. There are two forms of silicate when looking at their chemistry: