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http://cgz.e2bn.net/e2bn/leas/c99/schools/cgz/communities/Geography/AS%20Geography/AS%2
0Revision/Earth%20Systems%20Revision/Characteristics%20and%20formation%20of%20Intrusive
%20landforms

http://www.tulane.edu/~sanelson/geol212/intro&textures.htm

Dikes

Dikes are small (<20 m wide) shallow
intrusions that show a discordant relationship
to the rocks in which they intrude. Discordant
means that they cut across pre-existing
structures. They may occur as isolated
bodies or may occur as swarms of dikes
emanating from a large…

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Batholiths

Batholiths are very large intrusive bodies,
usually so large that there bottoms are
rarely exposed. Sometimes they are
composed of several smaller intrusions.

Type of Intrusion: Discordant (Vertical)
Intrusion - cut across the sedimentary rock
layers they intrude into.

Characteristics: large, igneous dome
shaped features (deep-seated); coarse
grained (due…

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