Transcript 9.22 Warm Up 1. If you were shown a cross section of rock layers

SUCCESS
• Pull out planners
• Absent students will be taking their quizzes =
– NO TALKING
9.22 Warm Up
1. If you were shown a cross section of rock layers
(like the one below) what would that tell you about
how the earth used to look?
2. Take a guess for the layers below
Announcements
• Turning in late/absent assignments
– *****MUST HAVE GREEN OR RED SLIP (or else
default to late******
• Labs, assignments, quizzes…
– All need to be completed by Wednesday
• Fall break next week
– You may start on projects during the break (unless
IRB – I’ll email you as soon as we hear back)
• (Go support volleyball team today @ 4:30 @ Erie)
Learning Goal: Structure of the Earth
4 – I can predict what layers are
oldest/newest and what the environment
was like based on the type of layer
3 – I can predict what layers are
oldest/newest
2 – I can predict most layers from
oldest/newest
1 – I need to review
Pull out your lab book
• Title: Story of the …
• Date: 9/22/14
• Learning Goal: Predict the environment of the
earth by studying rock layers
Rock layers tell us stories about the past!
The
Story of
the…
Once upon a time (well a long time ago – about 1.8
billion years ago) the North American plate collided
with an ancient change of volcanic islands, similar to
today’s Hawaiian Islands.
Great heat and pressure from the collision for a
schist type rock.
Deep, deep under the surface extreme pressure was
rising and caused magma to push up through cracks in
the schist creating veins of pink rock hardening to
become granite.
No fossils were found in the rock, it was too hot
Then, just a little bit later (well 515 million years
ago), a beautiful, romantic muddy, warm and
shallow sea covered this region.
You were likely to spot a few trilobites,
brachiopods, some crinoids and cool little wormlike dudes that lived under the sea (sorry no little
mermaid yet).
The green colored mud formed layers of green
shale located now in the Tonto Platform.
Eventually that sea dried up and became a
luscious coastal plain with little creeks and
streams.
You’d see little reptiles and tiny insects such
as 12 inch dragonflies buzzing around (no
biggie).
This layer was made up of siltstone,
mudstone and sandstone and creates the red
shale we see today.
https://www.youtube.com/watch?v=9kzorrSbaUA
About 5 million years later (275 mya) the
plains dried up and all that was left were large
sand dunes, similar to the Sahara desert.
Small desert dwelling creatures such as
reptiles, spiders, scorpions and other insects
lived here and left their footprints or tracks in
the sand. Those tracks fossilized and can be
found in the light colored sandstone.
Then only about 5 million years later, the
desert became flooded and became a
wonderful sea. It was shallow, warm and had
clear water.
It gave life to brachiopods, sponges,
crinoids, corals, cephalopods, fish, and even
sharks.
This last layer is called Kaibab limestone
and is at the very top.
• https://www.youtube.com/watch?v=g8TXkUw
jjtQ
• Pictures & information from:
• http://www.nps.gov/grca/forteachers/upload/
GeoArticle-11-1-11-2.pdf
• https://www.youtube.com/watch?v=g_GcLm1
FEQA
Make your own cross section:
• Create your own using the rock types we’ve
discussed and the fossils.
• Your neighbors will guess the order and type
of environment for yours.
• Top drawings will be shown to the class under
the doc cam
• (MAKE THEM NEAT)
Success
• I have students testing so please stay quiet
9.23 WARM UP
• Write down the following type of environment
for each rock type:
– Green shale:________________
– Red shale:______________
– Sandstone: _____________
– Limestone: _____________
– Conglomerate: _______________
Make your own rock layers
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•
Intrusive Igneous: Magma inside cooling, crystals
Extrusive Igneous: Lava cooling outside
Green Shale (sed): Murky, muddy sea
Red Shale (sed): Plains with streams
Sandstone: Desert
Limestone: Clear water sea
Conglomerate: Flood, mudslide, landslide
Wavy rocks (met): Plates colliding
Coal: Forest with lots of plants
Fossils you might find
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Intrusive Igneous: NONE
Extrusive Igneous: NONE
Green Shale (sed): Trilobites, Brachiopods, Crinoids
Red Shale (sed): Reptiles & Insects
Sandstone: Tracks
Limestone: Fish, Sharks, Sponges
Conglomerate: Rocks, pebbles, boulders
Wavy rocks (met): NONE
Coal: NONE
Practice with Forms in lab book
• Write the order from oldest newest, then
write the environment next to it
• Ex 1:
D- desert
A – Fault
B – deep ocean
C – Metamorphic from igneous
Make your own cross section:
• Create your own using the rock types we’ve
discussed and the fossils.
• Your neighbors will guess the order and type
of environment for yours.
• Top drawings will be shown to the class under
the doc cam
• (MAKE THEM NEAT)
Learning Goal: Structure of the Earth
4 – I can predict what layers are
oldest/newest and what the environment
was like based on the type of layer
3 – I can predict what layers are
oldest/newest
2 – I can predict most layers from
oldest/newest
1 – I need to review