tuesday january 29, 2013 (bowen’s reaction series)
TRANSCRIPT
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TuesdayJanuary 29, 2013
(Bowen’s Reaction Series)
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The Launch PadTuesday, 1/29/13
Rocks that are formed inside the Earth are called ________________ rocks.
Rocks formed on the surface are called _____________ rocks.
slowly far underground
quicker nearer the surface
very fast on the surface
after releasing gases
very fast on the surface
before releasing
gases
intrusive
extrusive
Describe how these rocks cooled.
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The Launch PadTuesday, 1/29/13
Complete the following sentences:
Coarse-textured igneous rocks usually have ______crystals because they cooled ______ underground, which
makes them ___________ rocks.
Fine-textured igneous rocks usually have ______ crystals because they
cooled _______ above or just underground, which makes them
either __________________ rocks.
Glassy-textured igneous rocks usually have _________ crystals because they
cooled ___________above ground, which makes them ____________rocks.
largeslo
wlyintrus
ivesmallquickl
y extrusive or intrusive
microscopi
cvery
quicklyextrusive
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Announcement
sHappy
Day!
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AnnouncementsI will be available after
school today until 5:00.
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Assignment Currently Open
Summative or
Formative?Date Issued Date Due Date Into
GradeSpeed Final Day
Quiz 15 S5 12/11 12/11 1/15 TODAY
Quiz 16 S1 1/18 1/18 1/24 2/7
WS – Igneous Rocks
F6 1/28 2/1 2/1
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Recent Events in ScienceNASA Officially Joins ESA's 'Dark Universe' Mission
Read All About It!www.nasa.gov/mission_pages/eucli
d/news/euclid20130124.html
NASA has joined the European Space Agency's (ESA's) Euclid mission, a space
telescope designed to investigate the cosmological mysteries of dark matter and
dark energy.Euclid will launch in 2020 and spend six
years mapping the locations and measuring the shapes of as many as 2 billion galaxies spread over more than
one-third of the sky. It will study the evolution of our universe, and the dark
matter and dark energy that influence its evolution in ways that still are poorly
understood."NASA is very proud to contribute to
ESA's mission to understand one of the greatest science mysteries of our time,"
said John Grunsfeld, associate administrator for NASA's Science Mission Directorate at the agency's Headquarters
in Washington.
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Igneous Rocks Yesterday we learned that there are two
criteria for classifying igneous rocks: texture (grain size) and mineral
composition.Mineral composition is, of course, the
types of minerals that make up the rock.The crystallization of magma is explained by Bowen’s Reaction Series, which shows
the order of mineral crystallization. This is influenced by crystal-settling in the
magma.Bowen’s Reaction Series is shown on the
next slide.
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Figure 3.13
Bowen’s reaction series
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Bowen’s Reaction SeriesMagma, with its diverse chemistry,
crystallizes over a temperature range of at least 450oC.
Therefore, as magma cools, certain minerals crystallize first, at
relatively high temperatures.At successively lower
temperatures, other minerals crystallize.
This arrangement of minerals became known as Bowen’s
Reaction Series.
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Bowen’s Reaction Series
The first mineral to crystallize from a mass of
magma is olivine.Further cooling results in
the formation of pyroxene, as well as plagioclase feldspar.
At intermediate temperatures, the
minerals amphibole and biotite begin to crystallize.
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Bowen’s Reaction Series
During the last stage of crystallization, after
most of the magma has solidified, the minerals
muscovite and potassium feldspar may
form.Finally, quartz
crystallizes from any remaining temperature.
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Bowen’s Reaction SeriesIn nature, we find that
minerals that form in the same general temperature range on Bowen’s chart are found together in the same
igneous rocks.For example, the minerals quartz, potassium feldspar,
and muscovite (or hornblende) are typically found together as major
components of the igneous rock granite.
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Figure 3.13
Bowen’s Reaction Series
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Figure 3.13
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Knowledge Check
What is the theme of Bowen’s Reaction Series?
Different minerals crystallize at different temperatures as magma
cools.
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WorksheetBowen’s Reaction
Series