ch 21: fossils and the rock record

Ch 21: Fossils and the Rock

Record

According to the scientific community How old is the

Earth?

About 4.6 billion years old

What evidence does the scientific community have that supports this

age?

Rock layersFossils

Radiometric dating

Where is the oldest rock on Earth located? How old are they?

• Western Green land between 3.7 – 3.8 billion years old • Rocks 3.4-3.6 billion have been found

in southern Africa, western Australia and the Great Lake region of north America

What type of rock are the oldest know rocks?

Metamorphic

According to the bible How old is the earth?

6,000 years old

What evidence does bible believers have that supports this

age? • Irish Archbishop James Ussher

(1581-1656)• Used the Bible to come up with

fairly precise dates for people and events mentioned in the Bible

• His calculations led him to determine that God created the universe on 23 October, 4004 BC

The answer is in Genesis!

http://www.answersingenesis.org/articles/2007/05/30/how-old-is-earth#fnMark_1_1_1

What do you think??

How much is a billion? IN CLASS ACTIVITY• Create a timeline of human milestones from

now to the earliest possible event.

ANY QUESTIONS?

Websites

• USGS Divisions of Geologic Timehttp://pubs.usgs.gov/fs/2007/3015/fs2007-3015.pdf• Virtual Museum of Fossils Valdosta State Universityhttp://fossils.valdosta.edu/• Smithsonian Geologic Time http://paleobiology.si.edu/geotime/main/index.html