Geologic time scale

  • 212 views
Uploaded on

 

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
212
On Slideshare
0
From Embeds
0
Number of Embeds
1

Actions

Shares
Downloads
2
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Geologic Time Scale (pg 6)
  • 2. Geologic Time Scale (pg 6)• A timeline of Earth’s history
  • 3. Geologic Time Scale (pg 6)• A timeline of Earth’s history• Based on both relative dating and absolute dating
  • 4. Geologic Time Scale (pg 6)• A timeline of Earth’s history• Based on both relative dating and absolute dating• Divides time into eons, eras, and periods
  • 5. Creating the Geologic Time Scale• The divisions are based on changes in the fossil record in different layers of rock
  • 6. Creating the Geologic Time Scale• The divisions are based on changes in the fossil record in different layers of rock• Scientists use radiometric dating to determine the age of each rock layer
  • 7. Eras1. Precambrian: Covers almost 90% of Earth’s history. Single-celled organisms
  • 8. Eras1. Precambrian: Covers almost 90% of Earth’s history. Single-celled organisms2. Paleozoic: Animals and plants appear. This era begins with the “Cambrian explosion” with many strange new types of animals
  • 9. Eras1. Precambrian: Covers almost 90% of Earth’s history. Single-celled organisms2. Paleozoic: Animals and plants appear. This era begins with the “Cambrian explosion” with many strange new types of animals3. Mesozoic: Dinosaurs, mammals, and flowering plants appear
  • 10. Eras1. Precambrian: Covers almost 90% of Earth’s history. Single-celled organisms2. Paleozoic: Animals and plants appear. This era begins with the “Cambrian explosion” with many strange new types of animals3. Mesozoic: Dinosaurs, mammals, and flowering plants appear4. Cenozoic: Mammals become dominant