Topic: Igneous Rocks

Igneous Rocks - Lava – Lava – Magma – Magma –

Cooling Solidification – Solidification – Crystallization – Crystallization –

Igneous Classification Mineral composition - Mineral composition - Texture - Texture - –-–-–-–-

Extrusive Igneous Rocks - - -

Intrusive Igneous Rocks - -

Animation: Igneous Rock Environments of Formation tent/investigations/es0603/es0603page05.cfm?chapter_ no=investigation tent/investigations/es0603/es0603page05.cfm?chapter_ no=investigation tent/investigations/es0603/es0603page05.cfm?chapter_ no=investigation 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 DescriptionGrain Size

Bubbles? Yes= Vesicular

Bubbles? No=Non-vesicular

Color Very Light LightNotVery Light Not Very Dark Dark Very Dark Neither Light nor Dark Lightest Darkest

Density Very Low LowDense Very Dense Medium Density

Composition

Composition Felsic Rocks – Felsic Rocks – –-–-–-–- –-–-–-–- –-–-–-–-

Mafic Mafic –-–-–-–- –-–-–-–- –-–-–-–-

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.