Dating The Major Events Of Life

Question 1

Why is geostratigraphy useful?

Answer 1

It allows correlation of widespread strata from different locations

Question 2

What two factors help determine relative dating?

Answer 2

Geostratigraphy and biostratigraphy

Question 3

What is geostratigraphy?

Answer 3

Relative dating
Sequence of geological events in rock
Can be used as a marker

Question 4

What is biostratigraphy?

Answer 4

Relative dating

Sequence of biological events that determines functional relations

Question 5

What can be used to determine absolute dating?

Answer 5

Geological clocks and molecular clocks

Question 6

What are geological clocks?

Answer 6

Radiometric dating

Question 7

What are molecular clocks?

Answer 7

Mutation accumulation rate

Question 8

What are some problems with molecular clocks?

Answer 8

Wide variability around means values
Neutral variation may be uncommon
Rates can vary widely between each group