Geologic Time Scale
Homework
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Create Unconformity Foldable:
Include Drawing and Real-life picture
of each; Description of the types of
rocks and their locations; 2 additional
facts (Sept 7)
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Create a study cards for last week
notes
Prepare for Quiz on this Friday
(September 7)
Complete Essential Question by
Sept 10
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Guided Questions
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What are the geological unit of time
from smallest to largest?
What is one major event that
occurred during the Precambian
Era?
What is one major event that
occurred during the Paleozoic Era?
What is one major event that
occurred during the Mesozoic Era?
What is one major event that
occurred during the Cenozoic Era?
Now let’s figure
out how we
did???
Draw a line under
what we just
did…the next
pages are
NOTES!
What is the
geologic time
scale?
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Time-line of Earth’s history
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Breaks down Earth’s history into
units of time
Eras are the largest unit of time.
Ex: Precambrian
Paleozoic
Mesozoic
Cenozoic
Eras are divided into smaller parts
called periods.
Periods are then divided into even
smaller parts called epochs.
Precambrian
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Earliest span of time in Earth’s
history.
No life for a long time and then
very simple life appears.
Early life influenced by
volcanoes and mountain
building
Paleozoic Era
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Took place after Precambrian.
Early invertebrates and
amphibians,
“Age of Fishes”.
Tropical climates allowed growth
of new species
Mass extinction at end most
marine invertebrates
disappeared.
Mesozoic Era
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Took place after Paleozoic Era.
Reptiles, small mammals, and
small birds.
“Age of Reptiles” -dinosaurs, etc
Late mass extinction by asteroid
or climate change that caused
dinosaurs to go extinct.
Cenozoic Era
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The Era we are currently in!!!
Mammals, flowering plants,
humans.
“Age of Mammals”
We still have much diversity but
could there be a mass extinction
to come???
Rebuild the Cliff
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Which is the oldest layer of
rock? How can you tell?
What is the oldest fossil? Hoe
do you know?
What great event probably
occurred in the area? How can
you tell?
Arrange the fossils in order of
their appearance in the rock
record?