Download 2-5 Igneous Identification

2-5 Igneous Rock
Identification
Unit 2: Rocks and Minerals
October 24, 2011
Sanders
7:26 AM
Vocabulary
1. Felsic
2. Mafic
3. Vesicular
May 24, 2017
Rocks and Minerals
Felsic Rocks
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Rocks and Minerals
Felsic Rocks
 Light in color.
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Rocks and Minerals
Felsic Rocks
 Light in color.
 Low in density.
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Rocks and Minerals
Felsic Rocks
 Light in color.
 Low in density.
 Forms at a lower
temperature.
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Rocks and Minerals
Felsic Rocks
 Light in color.
 Low in density.
 Forms at a lower
temperature.
 Potassium Feldspar
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Rocks and Minerals
Felsic Rocks
 Light in color.
 Low in density.
 Forms at a lower
temperature.
 Potassium Feldspar
 Quartz
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Rocks and Minerals
Felsic Rocks
 Light in color.
 Low in density.
 Forms at a lower
temperature.
 Potassium Feldspar
 Quartz
 Plagioclase Feldspar
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Rocks and Minerals
Felsic Rocks
 Light in color.
 Low in density.
 Forms at a lower
temperature.




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Potassium Feldspar
Quartz
Plagioclase Feldspar
Biotite Mica
Rocks and Minerals
Felsic Rocks
 Light in color.
 Low in density.
 Forms at a lower
temperature.





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Potassium Feldspar
Quartz
Plagioclase Feldspar
Biotite Mica
Amphibole
Rocks and Minerals
Obsidian
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Rocks and Minerals
Obsidian
 Texture is
crystalline.
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Rocks and Minerals
Obsidian
 Texture is
crystalline.
 Despite being
felsic, it is dark
in appearance,
the exception to
the felsic rule.
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Rocks and Minerals
Obsidian
 Texture is
crystalline.
 Despite being
felsic, it is dark
in appearance,
the exception to
the felsic rule.
 Extrusive
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Rocks and Minerals
Pumice
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Rocks and Minerals
Pumice
 Texture is glassy
but has vesicles,
holes.
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Rocks and Minerals
Pumice
 Texture is glassy
but has vesicles,
holes.
 It cooled so
quickly that
minerals didn’t
have time to form.
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Rocks and Minerals
Pumice
 Texture is glassy
but has vesicles,
holes.
 It cooled so
quickly that
minerals didn’t
have time to form.
 Extrusive
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Rocks and Minerals
Vesicular Rhyolite
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Rocks and Minerals
Vesicular Rhyolite
 It is an extrusive
rock; formed
form lava.
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Rocks and Minerals
Vesicular Rhyolite
 It is an extrusive
rock; formed
form lava.
 Minerals are
less than 1mm.
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Rocks and Minerals
Vesicular Rhyolite
 It is an extrusive
rock; formed
form lava.
 Minerals are
less than 1mm.
 Extrusive
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Rocks and Minerals
Rhyolite
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Rocks and Minerals
Rhyolite
 It is an extrusive
rock; formed
form lava.
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Rocks and Minerals
Rhyolite
 It is an extrusive
rock; formed
form lava.
 The crystals are
less than 1 mm.
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Rocks and Minerals
Rhyolite
 It is an extrusive
rock; formed
form lava.
 The crystals are
less than 1 mm.
 Extrusive
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Rocks and Minerals
Granite
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Rocks and Minerals
Granite
 Intrusive rock
formed from
magma.
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Rocks and Minerals
Granite
 Intrusive rock
formed from
magma.
 It has course
texture.
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Rocks and Minerals
Granite
 Intrusive rock
formed from
magma.
 It has course
texture.
 Crystal size is
between 1 - 10 mm.
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Rocks and Minerals
Granite
 Intrusive rock
formed from
magma.
 It has course
texture.
 Crystal size is
between 1 - 10 mm.
 Intrusive
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Rocks and Minerals
Pegmatite
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Rocks and Minerals
Pegmatite
 Formed from
magma.
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Rocks and Minerals
Pegmatite
 Formed from
magma.
 Texture is very
course.
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Rocks and Minerals
Pegmatite
 Formed from
magma.
 Texture is very
course.
 The crystal size
is 10 mm.
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Rocks and Minerals
Pegmatite
 Formed from
magma.
 Texture is very
course.
 The crystal size
is 10 mm.
 Intrusive
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Rocks and Minerals
Mafic Rocks
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Rocks and Minerals
Mafic Rocks
 Dark in color.
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Rocks and Minerals
Mafic Rocks
 Dark in color.
 High in density.
May 24, 2017
Rocks and Minerals
Mafic Rocks
 Dark in color.
 High in density.
 Forms at a higher
temperature.
May 24, 2017
Rocks and Minerals
Mafic Rocks
 Dark in color.
 High in density.
 Forms at a higher
temperature.
 Plagioclase Feldspar
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Rocks and Minerals
Mafic Rocks
 Dark in color.
 High in density.
 Forms at a higher
temperature.
 Plagioclase Feldspar
 Biotite Mica
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Rocks and Minerals
Mafic Rocks
 Dark in color.
 High in density.
 Forms at a higher
temperature.
 Plagioclase Feldspar
 Biotite Mica
 Pyroxyene
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Rocks and Minerals
Mafic Rocks
 Dark in color.
 High in density.
 Forms at a higher
temperature.




Plagioclase Feldspar
Biotite Mica
Pyroxyene
Amphibole
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Rocks and Minerals
Mafic Rocks
 Dark in color.
 High in density.
 Forms at a higher
temperature.





Plagioclase Feldspar
Biotite Mica
Pyroxyene
Amphibole
Olivine
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Rocks and Minerals
Basaltic Glass
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Rocks and Minerals
Basaltic Glass
 Glassy in
texture.
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Rocks and Minerals
Basaltic Glass
 Glassy in
texture.
 Non-crystalline.
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Rocks and Minerals
Basaltic Glass
 Glassy in
texture.
 Non-crystalline.
 Can be light in
color.
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Rocks and Minerals
Basaltic Glass
 Glassy in
texture.
 Non-crystalline.
 Can be light in
color.
 Also know as
Pele hair
May 24, 2017
Rocks and Minerals
Basaltic Glass
 Glassy in
texture.
 Non-crystalline.
 Can be light in
color.
 Also know as
Pele hair
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Rocks and Minerals
Basaltic Glass
 Glassy in
texture.
 Non-crystalline.
 Can be light in
color.
 Also know as
Pele hair
 Extrusive
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Rocks and Minerals
Scoria
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Rocks and Minerals
Scoria
 Glassy in
Texture.
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Rocks and Minerals
Scoria
 Glassy in
Texture.
 Non-crystalline.
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Rocks and Minerals
Scoria
 Glassy in
Texture.
 Non-crystalline.
 Vesicles
indicate rapid
cooling.
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Rocks and Minerals
Scoria
 Glassy in
Texture.
 Non-crystalline.
 Vesicles
indicate rapid
cooling.
 Extrusive
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Rocks and Minerals
Vesicular Basalt
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Rocks and Minerals
Vesicular Basalt
 Fine texture.
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Rocks and Minerals
Vesicular Basalt
 Fine texture.
 Crystal size less
than 1 mm.
May 24, 2017
Rocks and Minerals
Vesicular Basalt
 Fine texture.
 Crystal size less
than 1 mm.
 Vesicular.
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Rocks and Minerals
Vesicular Basalt
 Fine texture.
 Crystal size less
than 1 mm.
 Vesicular.
 Extrusive
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Rocks and Minerals
Basalt
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Rocks and Minerals
Basalt
 Fine texture.
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Rocks and Minerals
Basalt
 Fine texture.
 Crystals lass
than 1 mm.
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Rocks and Minerals
Basalt
 Fine texture.
 Crystals lass
than 1 mm.
 Extrusive
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Rocks and Minerals
Diabase
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Rocks and Minerals
Diabase
 Texture runs
from fine to
coarse.
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Rocks and Minerals
Diabase
 Texture runs
from fine to
coarse.
 Palisades are
formed from
diabase.
May 24, 2017
Rocks and Minerals
Diabase
 Texture runs
from fine to
coarse.
 Palisades are
formed from
diabase.
May 24, 2017
Rocks and Minerals
Diabase
 Texture runs
from fine to
coarse.
 Palisades are
formed from
diabase.
 Can be either
extrusive or
intrusive.
May 24, 2017
Rocks and Minerals
Gabbro
May 24, 2017
Rocks and Minerals
Gabbro
 Texture is
course.
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Rocks and Minerals
Gabbro
 Texture is
course.
 Grain size from
1 - 10 mm.
May 24, 2017
Rocks and Minerals
Gabbro
 Texture is
course.
 Grain size from
1 - 10 mm.
 Intrusive
May 24, 2017
Rocks and Minerals
Peridotite
May 24, 2017
Rocks and Minerals
Peridotite
 Course texture.
May 24, 2017
Rocks and Minerals
Peridotite
 Course texture.
 Crystal size 1 10 mm.
May 24, 2017
Rocks and Minerals
Peridotite
 Course texture.
 Crystal size 1 10 mm.
 Mineral
Identification
May 24, 2017
Rocks and Minerals
Peridotite
 Course texture.
 Crystal size 1 10 mm.
 Mineral
Identification
 Pyroxene
May 24, 2017
Rocks and Minerals
Peridotite
 Course texture.
 Crystal size 1 10 mm.
 Mineral
Identification
 Pyroxene
 Olivine
May 24, 2017
Rocks and Minerals
Peridotite
 Course texture.
 Crystal size 1 10 mm.
 Mineral
Identification
 Pyroxene
 Olivine
 Intrusive
May 24, 2017
Rocks and Minerals
Dunite
 Texture is course.
May 24, 2017
Rocks and Minerals
Dunite
 Texture is course.
May 24, 2017
Rocks and Minerals
Dunite
 Texture is course.
 Crystal size is 1 - 10
mm.
May 24, 2017
Rocks and Minerals
Dunite
 Texture is course.
 Crystal size is 1 - 10
mm.
 It is unique that it
only contains the
mineral olivine.
May 24, 2017
Rocks and Minerals
Dunite
 Texture is course.
 Crystal size is 1 - 10
mm.
 It is unique that it
only contains the
mineral olivine.
 It is monomineralic.
May 24, 2017
Rocks and Minerals
Dunite
 Texture is course.
 Crystal size is 1 - 10
mm.
 It is unique that it
only contains the
mineral olivine.
 It is monomineralic.
 Intrusive
May 24, 2017
Rocks and Minerals