Transcript Relative Dating Poster/Snickers Lab

Snickers Relative Dating Lab
Snickers Relative Dating
Assignment
• 1. Cut the chocolate off of one side of your snickers bar
• 2. Draw and label the four main layers of your snickers bar
• 3. Cut a fault into your snickers and piece it back together off
center
• Redraw
• 4. Tilt one half of your fault and stick snickers back together.
Redraw
• 5. Point out inclusions
• 6. Weather and erode top couple layers of snickers. Leave
angles! Redraw
• 7. Now use bit of frosting to add another layer of sediment…
add to drawing and label unconformities
Top
chocolate
There are 3 Rules that
allow scientists to date
3 Laws ofrocks
Relative Dating
Caramel and
Peanut Layer
Relative Dating
: Layer on top Is always youngest
Nougat
LEARNING CHECK 1
Which layer on your snickers bar is the youngest and which is the oldest
Bottom chocolate
layer
2.
Any fault or magma plume that cuts across a rock is always younger than the rock it cuts
across
LEARNING CHECK 2
Is the fault you cut into the snickers older or younger than the snickers rock around it?
Fault
The bottom
chocolate
layer is now
above the
younger
layers
Because of
the tilting
3.
All rocks are laid down flat to begin with… if they are angled or vertical they are not new.
So sometimes the rules don’t apply…
LEARNING CHECK 3
Can you point out where old rock is now above young rock… does that make it
younger?
Old pieces of igneous
rocks that have been
concreted in by
younger sedimentary
rocks.
Inclusions
LEARNING CHECK 4
What are the inclusions in your
snickers bar? In reality are
they older than the stuff they
are in?
Breaks in the rock record because eroded rock has been
destroyed
Unconformities
Learning Check: 5
Label two different areas where your rocks have been lost forever and new
rock has overlaid.
WarmUp (2-8-13)
Which letter is pointing to the oldest layer?
Which law of relative dating explains how we
know?
A – Law of Superposition
C.
Agenda:
1.WarmUp
2.How It’s Made
3.Snickers Lab
4.Rock Clip
B.
A.
NAME___________________
Lottery #3 Geoscience
• WarmUps
• Paleozoic Poster
2 facts for each period and 3 pics
• Mesozoic Poster
2 facts for each period and 3 pics
• Cenozoic Poster
• 2 facts for each period and 3 pics
• History of the Earth Movie Facts
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