Quartz

Quartz is one of the most abundant forms of rock in the Earth's crust, exceeded only by Feldspar. Quartz can be a beautiful rock, and some forms are considered semi-precious gems. It is a silicate made up of Silicon  and Oxygen (SiO2).

While this igneous rock is highly deposited all around the world, a particular high concentration of it can be found on the inland, and both coasts of Brazil.

 

Mineral Identification:

Quartz

 Obsidian

 Amethyst

Galena 

 Limestone

 Mica

Geologists utilize many types of maps...

The Choropleth Map

Showing the state by state Presidential preferences of  2004

Isarithmic Map

Depicting the barometric pressures across North America

The Bathymetric Map

portraying the sea level around the coast of Puerto Rico

 The Dot Density Map

Illustrating the gross domestic production of mining within the U.S. in 2006

 The Proportional Symbol Map

Showing the amount of cattle sold in Maryland

My Prepared Map