Download Activity 6 ABBY - nansenESE

Activity 6
By: Abby Baker
7a
GEO- WORDS!

Intrusive igneous rock
is the depth by the
crystallization of
magma.

Extrusive igneous rock
is a rock formed by an
eruption of lava.
Igneous rocks



Igneous rocks are forms from lava and
cooling magma
Slow cooling allows crystals to form
2 types:
Intrusive and Extrusive
Intrusive igneous rock



It’s formed under ground
It contains very LARGE crystals
ONLY seen during the erosion or uplift
Extrusive igneous rock


It’s formed from magma brought to the earths
surface
Contains TINY crystals that can’t be seen
with the naked eye
Types of volcanic rocks!


Basalt: dark, fine grained
~Low silica
~most common rocks that are on earth
~makes up the ocean floor
Dacite
~silica rich
~light in color
~fined grained
References

Wikispaces.com