This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: What Rocks are Made of 11/02/2008 12:57:00 Rocks are made up of minerals How do minerals form? Three ways o Cooling From Melted rock (volcano) o Chemical Precipitation from a solution (the crystallized minerals left in a tea kettle after water has boiled away.or with salt stains on streets during the winter.) o Formation from solid state (diamondgraphite heated and squeezed to an extreme amount and then turns into a diamond). Some Key Minerals 4000 minerals 3 Key groups of minerals o Silicates (most abundant on earth.silicon and oxygen plus other elements) Made of two key atoms, silicon and oxygen. In a tetrahedron shape. SiO 2 + other elements Make up 90% of the rocks in the continental crust Light versus Dark silicates in color and density (light is less dense, and usually brighter) Ex. Quartz is a Light silicate (SiO 2 ) Ex. Feldspar is a light silicate Ex. Pyroxene Dark silicate (Dark green)Ex....
View Full Document
This note was uploaded on 04/01/2008 for the course GEOL 1010 taught by Professor Pranter,ma during the Spring '07 term at Colorado.
- Spring '07