Quiz on minerals  Get out you ESRT and a piece of paper  The following questions are from your ESRT.  You’ll have a minute per question…

Question 1  What is a minerals? –Name three things mineral must have to be a mineral.

Question 2  What is a mineral that is nonmetallic, flexible in thin sheets, is black and has cleavage?

Question 3  What is the chemical composition of olivine?

Question 4  What controls a minerals property?

Answers  What is a minerals? –Solid, inorganic, naturally occurring  Nonmetallic, flexible in thin sheets –Biotite  What is the chemical composition of olivine –(Fe,Mg) 2 SiO 4  What controls a minerals property? –IAOA

Rocks & Minerals The Building Blocks of society

Igneous Rocks Made from Magma and Lava

Igneous rocks  How are igneous rocks formed?  What do igneous rocks look like?  What do the characteristics tell us about the rock?  What are igneous rocks used for?  How do you use page 6 of the ESRT for Igneous rocks?

How are igneous rocks formed?  Extrusive or volcanic - lava on the earth’s surface  Intrusive or plutonic - inside the earth’s crust, magma chambers

What do igneous rocks look like?  Vesicular = gas bubbles (extrusive) Or  Nonvesicular = no gas bubbles

What do igneous rocks look like?  Felsic light in color and density, rich in aluminum (continental crust) or  Mafic dark in color and high in density, rich in iron and magnesium (ocean crust)

What do igneous rocks look like?  Texture can be glassy, fine grained, coarse grained, or very coarse grained

What do the characteristics tell us about the rock?  Cooled slowly in the crust = large minerals  Cooled rapidly on the surface = no or very small minerals  Vesicular = very gaseous lava flow

What are igneous rocks used for?

How to use esrt page 6 - Igneous Rocks?