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Cause and Effect In the Rock Cycle
http://www.rocksandminerals4u.com/images/rock-cycle-diagram-im.jpg
An Igneous Rock starts out as liquid rock called
magma.
There Are Two Kinds of Igneous Rock
• If magma cools and hardens inside Earth,
it becomes an intrusive Igneous Rock.
• If magma comes to Earth’s surface, it is
called lava.
• When lava cools and hardens on the
surface of Earth, it becomes an extrusive
Igneous Rock.
Igneous Rock can change to
Sedimentary Rock
Andesite: An extrusive Igneous Rock
www.mii.org/Minerals/photoandesite.html
Breccia: A Sedimentary Rock
http://www.guilford.edu/geology/imagelibrary/MVC-048F.JPG
Moss weathers an Igneous Rock. The
moss produces an acid that breaks
rock down into sediment.
http://wwwfs.org/2003/Iceland_Aug03/P8200288a.jpg
Sediments are transported by
moving water to a lake or ocean.
Sediments are compacted by the
weight of the water above.
Igneous Rock can change to
Metamorphic Rock
Granite: An Intrusive Igneous Rock
http://www.beg.utexas.edu/mainweb/publications/grap
hics/granite-400.jpg
Gneiss: A Metamorphic Rock
http://skywalker.cochise.edu/wellerr/rocks/mtrx/6mr
x-gneiss-flat2.jpg
An intrusive Igneous Rock is
formed deep underground.
http://www.minsocam.org/MSA/K12/rkcycle/intrusives.html
An intrusive Igneous Rock is heated up
by nearby magma, but does not melt.
http://www.windows.ucar.edu/earth/geology/images/batholith_sm.gif
The crystals become larger, and
the rock becomes denser.
http://www.minsocam.org/MSA/K12/rkcycle/nonfoliated.html
Granite is an Igneous Rock often
used to make countertops.