Rocks The Dating Game

Topics: Geology, Fossil, Magnetic field Pages: 6 (353 words) Published: February 6, 2015
Rocks: The
Dating Game
ch
By:Rebecca Cze
3-23-12

Rules to the Game
Rule of Superposition
States that the rocks on the bottom are the oldest and
the rocks on the top are the youngest.

Rule of Crossing-Cutting Relationships
States that if a rock that cuts through the rock layers is
younger than the rock layers itself

Rule of Lateral Continuity
States that everything on the same layer are the same age

Rule of Original Horzitonality
States that the orginal layer was horizontal, but over the
years became wavy

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The Pa
● Radiometric Dating: It has isotopes and
those isotopes decay, so they date them.
● The Magnetic Field: Has poles and every
once in awhile it switches poles
● Index Fossils: If they exist in one layer,
then that's how old the rock is
● Underwater Volcanoes: It pushes up new
rock to surface every day!

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What's Yo
All of the following things that have been
mentioned in previous slides are all important
to the dating game. And they all relate to
each other and the rules in some way, shape,
or form. The Law of Superposition helps out
index fossils, and index fossils helps out the
Law of Superposition.

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How doe
Magnetic fields switch every once in awhile
and rocks have a little bit of magnetism in
them so the rocks have different magnetic
poles too. Index fossils are found in rock
layers. And these rocks get pushed up to the
surface from volcanoes both in and out of the
water.

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Three things that came out of this slide:
1. What the Rules of Dating Rocks Are
2. Some of the Methods that Geologists use to Age
Rocks
3. How all of the Rules and Rocks Relate to Each Other

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