Dating The Major Events Of Life Flashcards
1
Q
Why is geostratigraphy useful?
A
It allows correlation of widespread strata from different locations
2
Q
What two factors help determine relative dating?
A
Geostratigraphy and biostratigraphy
3
Q
What is geostratigraphy?
A
Relative dating
Sequence of geological events in rock
Can be used as a marker
4
Q
What is biostratigraphy?
A
Relative dating
Sequence of biological events that determines functional relations
5
Q
What can be used to determine absolute dating?
A
Geological clocks and molecular clocks
6
Q
What are geological clocks?
A
Radiometric dating
7
Q
What are molecular clocks?
A
Mutation accumulation rate
8
Q
What are some problems with molecular clocks?
A
Wide variability around means values
Neutral variation may be uncommon
Rates can vary widely between each group
