History of the Earth
RYAN SULLIVAN
10TH GRADE GEOLOGY
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Introduction

Hello! This interactive PowerPoint is meant to give you an
incredibly brief overview of the next unit we will be doing. As
you may have already guessed that unit is the history of the
Earth. This material will be covered in two main ways,
geologically and biologically. This is pretty deep stuff so we will
just go over the main features in this unit. Just sit back, relax, and
go through this PowerPoint to get an idea of what we will cover
over the next few weeks. See you in class!
Mr.
Sullivan
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Click On Each Era to Learn More
About Them
Question
Precambrian
Geology
Paleozoic
Geology
Mesozoic
Geology
Cenozoic
Geology
Precambrian
Biology
Paleozoic
Biology
Mesozoic
Biology
Cenozoic
Biology
Precambrian Geology

Volcanoes erupting everywhere, atmosphere filled with CO2.

Atmosphere was much hotter than today.

Eventual formation of supercontinent Columbia
during early Proterozoic. It later broke up
and became Rodina in the Mesoproterozoic.
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Precambrian Biology

Zero life during Hadean eon.

Life developed during Archean into simple single celled organisms.
(Evidence is Miller-Urey Hypothesis)

Eventual formation of eukaryote cells
during early Proterozoic.
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Mesozoic Geology

Due to Pangea, many areas far away from the ocean were warm
and arid (at least seasonally). There were virtually no glaciers
anywhere early on. (Triassic)

Heavy rifting in modern North America, reefs formed along
continental shelf. (Jurassic)

Rifting of Pangea occurred during Jurassic with heavy rifting during
the Cretaceous, giving us a more modern appearance of the
continents.
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Mesozoic Biology

Slow recovery at start from mass extinction at the end of the
Paleozoic. However, there was another extinction at the end of the
Triassic

True dinosaurs appeared mid Triassic.

Plant life evolved to form angiosperms.

Large extinction at end of Mesozoic, associated with dinosaur
extinction 65 million years ago.
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Paleozoic Geology

Early climate was warm, with periodic glaciation due to Rodina
being at the south pole causing a snowball Earth effect.

Heavy plate tectonic activity led to breakup of Rodina.

Pangea assembled at end of Paelozoic about 252 million years ago.
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Paleozoic Biology

Diversification of life increased rapidly during the Cambrian
Explosion, creating almost all of the known phyla today.

First land animals appeared in late Silurian.

Bony fish flourishing during the Silurian. With land plants also
introduced late in Silurian.

Massive extinction at the end of the
Permian. Over 90% of species died.
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Cenozoic Geology

Appearance of continents becomes what it is known as today.

Climate cools and Pleistocene glaciations occur.

Messinian salinity crisis occurs.

Himalayan orogeny occurs.
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Cenozoic Biology

Humans eventually evolve to what we are today.

First whales evolve, as well as fresh water fish.

Angiosperms become dominate vegetation.
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Question time!
 About
form?
how long ago did Pangea

A – ~252 million years ago

B – ~750 million years ago

C – ~ 100 million years ago

D - ~2 Billion years ago
Sorry, Try Again!

This is not when Pangea formed.
Sorry, Try Again!

This is not what the Cambrian
Explosion means.
Sorry, Try Again!

This is not when the Pleistocene
Glaciations happened.
YAY! Good Job!
You are correct!
Next
Question
YAY! Good Job!
You are correct!
Final
Question
Thank you for Completing this
Presentation! Good Job!
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Question two!
 The
Cambrian explosion means
what?

A – Cambria began to break apart.

B – A long era of volcanic activity.

C – The diversity of life increased



drastically.
D – The diversity of life decreased
drastically.
Final Question!
 In
what time period did the
Pleistocene Glaciations occur?

A – Precambrian

B – Paleozoic

C – Mesozoic

D - Cenozoic