Geological Timescale

Geologic Time

Scale: Relative and

Absolute Dating

Mrs. Teresita B. Moreno

1. Explain how relative and absolute dating was
used to determine the subdivisions of geologic
time.

2. Describe how the Earth's history can be
interpreted from the geologic time scale.

MELC

1. Name the divisions of the geologic time scales.

2. Characterize each major and subdivision in the
geologic time scale.

3. Describe how relative and absolute dating
provide evidence of geologic history.

Objectives

Multiple Choice

As climate change sea levels rose worldwide and seas expanded across the

center of North America. Some of the discovered fossils include dinosaur

bones, teeth, and diverse plant fossils. Which division is being referred to in

the given statement?

• Cenozoic
  

• Mesozoic
  

• Paleozoic
  

• Precambrian
  

Multiple Choice

Which of the given statements does NOT represent the geologic time scale?

• The geologic history of the universe.
  

• The fossil record of flora and fauna.
  

• The age of the Earth and its inhabitants.
  

• Evolution of life dating back 4.6 billion years ago.
  

Multiple Choice

Where are the oldest rocks found in an undisturbed rock profile?

• at the bottom
  

• in the middle

• on the top

• anywhere

Multiple Choice

When naming the subdivisions of the Earth’s geology in a specific order, which method must be considered?

• Absolute dating
  

• Isotopic dating
  

• Radiometric dating
  

• Relative dating
  

Precambrian

- It accounts for
88 % of Earth's

history

- Phanerozoic

Eon

- it means visible

life

EONS

- are the longest
portions in the
geologic time

Hadean Eon

- Few rocks were deformed

and metamorphosed

Archean Eon

Marine rocks contain

fossil remains of

microscopic algae and

bacteria.

Proterozoic Eon

rifting of the continental
crust
subsequent filling with
sedimentary and volcanic
rocks

Paleozoic Era

It is the beginning of early life
All of the continents had
come together to form the
supercontinent called Pangea.
It is characterized by the rapid
development of terrestrial
plants.
Denovian period is known as
the age of fishes.

Mesozoic Era

It is also known as the Age of
Dinosaurs

Pangea rifted into Laurasia
and Gondwanaland and
bacteria

Cenozoic Era

It is also known as the age of recent
life or the age of mammals.

It has the most complete record of
any era because the rocks are more
accessible.

Paleogene Period

Most of Earth's climate was
tropical.

Continents drifted apart creating
vast stretches of oceans.

It consists of the Paleocene,
Eocene, and Oligocene Epoch.

Neogene Period

It gives rise to early
primates

It consists of the Miocene and
Pliocene

Quaternary Period

It is the most recent period
It is also termed
Anthropogene period
It is divided into two
epochs: Pleistocene and
Holocene
Holocene- when human
civilization arose

Make a creative time line of

your life!

​ASSESSMENT

Multiple Choice

In which division in the geologic time scale did the continents come together to form the supercontinent called Pangaea?

• Paleozoic Era
  

• Cenozoic Era
  

• Triassic Period
  

• Jurassic Period
  

Multiple Choice

Which epoch in the geologic time scale designates human lives in a very

short period of time?

• Eocene
  

• Holocene

• Pliocene
  

• Pleistocene
  

Match

Match the following

• HOLOCENE

• MESOZOIC

• DENOVIAN

• CENOZOIC

• NEOGENE

human civilization arose

Age of Dinasaurs

Age of Fishes

Age of MAmmals

Give rise to early Primates

• human civilization arose

• Age of Dinasaurs

• Age of Fishes

• Age of MAmmals

• Give rise to early Primates

​REFLECTION

Open Ended

I learned that............

Open Ended

I undesrtand that............