THIS POWERPOINT WILL TELL YOU
HOW BASALT ROCKS ARE MADE, AND WHAT
THEY ARE MADE UP OF.
MADE BY SAM VIDELOCK
What are Basalt
Rocks?:
Basalt rocks are an
Igneous volcanic rock,
that are usually black or
grey. The basalt rocks
are Iron rich and fine
graved on the outside.
These rocks start out as
molten lava from a
volcano and once they
dry turn into the Igneous
rock known as basalt.
http://images.google.com/imgres?imgurl=http://z.about.com/d/geology/1/0/
R/K/basalt.jpg&imgrefurl=http://geology.about.com/library/bl/images/blbasa
lt.htm&h=290&w=400&sz=56&hl=en&start=1&sig2=TWmyXSFnbEmQJGrWp
tIS1g&um=1&usg=__BHOYNupVhiv997w96CciNtAeodM=&tbnid=zgj0xHKJwf
eIsM:&tbnh=90&tbnw=124&ei=t472SMSuDIe4sAPwjm9Dg&prev=/images%3Fq%3Dbasalt%26um%3D1%26hl%3Den%26sa%3DN
What Basalt Can Look Like
• Basalt rocks can look many
different ways. Just by looking at
these pictures you can see that
Basalt can be very smooth, like
the picture to the bottom right, or
it can have vesicles, gas bubbles,
like in the picture on the top.
• Most of the Basalt rocks are
grey, but some of the rocks can
appear to be a greenish color, or
even a reddish color.
pictures http://www.meteorites.wustl.edu/id/lavarocks.ht
m
 Basalt forms widespread lava
flows. (picture to the right.). The
major places this occurs is Iceland,
Hawaii, and the Galapagos Islands.
 Some Ancient basalt structures
have existed for over 50 million
years.

Pictures

http://www.earth.ox.ac.uk/~oesis/field/med
ium/basalt2.jpg
 In the previous slides I have told
you that sometimes the colors of
basalt can be different, like being
red, green, or even whitish.
 Basalt starts to look whitish in
arid areas, (dry areas).
 Basalt looks reddish in more
humid areas, although black and
grey is most common.

Picture –

http://www.bryancater.co.uk/chippings.htm
Basalt rocks can look and feel many
different ways. First, some basalt rocks
can be very smooth, this occurs when
water erosion takes place.
 Next, basalt can have a rough solid
outside layer where the outside feels
gravelly.
 Also, newly formed basalt can have a
lot of holes in it, from when it has just
cooled from magma.
 The picture to they right is a piece of
basalt rock that is fairly smooth, but
can also have the gravelly feel to it.


Picture-

http://geology.com/rocks/pictures/basalt.jpg