Download Topic: Igneous Rocks

Topic: Igneous Rocks
Igneous Rocks
 Lava –
 Magma –

Cooling
Solidification –
 Crystallization –

Igneous Classification
Mineral composition  Texture 
–-
Extrusive Igneous Rocks

Intrusive Igneous Rocks

Animation: Igneous Rock
Environments of Formation

http://www.classzone.com/books/earth_science/terc/con
tent/investigations/es0603/es0603page05.cfm?chapter_
no=investigation
Best Friend Pg 6
Scheme for Igneous Rocks for identification
Take out YOUR ESRT!
Identifying Igneous Rocks
Igneous Rock Names
Environment
of Formation
Crystal size
Grain Size
Description
Bubbles?
Yes= Vesicular
Bubbles?
No=Non-vesicular
Neither Light nor Dark
Very Light
ColorNot Very DarkVery Dark
Light
NotVery Light
Dark
Darkest
Lightest
Very Low
Medium Density
Density
Low
Dense
Very Dense
Composition
Composition

Felsic Rocks –
–––-

Mafic
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Finding The Minerals
Identify the rock.
Unless you have other information,
work in the middle of the rock’s box.
This is the amount of Potassium Feldspar in the rock.
This is the amount of Quartz in the rock.
This is the amount of Plagioclase Feldspar in the rock.
Use tick marks on a scrap paper to measure the percentage.
Potassium Feldspar 25%
Quartz 40%
Practice
Name a light-colored, fine-grained
rock with no bubbles.
Name a coarse-grained, dense rock & contains
only Olivine.
Name a very light-colored, glassy,
extrusive rock with bubbles.
FQ:
Name the fine grain, vesicular igneous
rock, with the minerals plagioclase
feldspar, pyroxene and amphiboles.